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2D Materials · Quantum Information

Quantum states, one atom-thin layer at a time.

Synthesize the crystal. Engineer the quantum state.

We grow atomically thin crystals and engineer them into the devices behind tomorrow's low-power chips and quantum computers.

News
New · Nat. Rev. Elec. Eng. (2026): Indium selenides for next-gen low-power computing New · Nanoscale (2025): MOCVD review of 2D chalcogenides & heterostructures Open · Postdoc vacancy — 2D heterostructure QIS · Graduate students welcome New · Nat. Rev. Elec. Eng. (2026): Indium selenides for next-gen low-power computing New · Nanoscale (2025): MOCVD review of 2D chalcogenides & heterostructures Open · Postdoc vacancy — 2D heterostructure QIS · Graduate students welcome

We do it all in-house — growth to measurement

Synthesis → Device
MOCVD growth schematic
01 · Synthesize

Wafer-scale growth

MOCVD & thermal CVD

Atomic-resolution STEM of Mn-doped WS2
02 · Characterize

Atomic-scale check

Raman · STEM · AFM

van der Waals device optical micrograph
03 · Fabricate

Interface & process engineering

vdW assembly · gating · litho

Device transport measurement
04 · Measure

Device & quantum measurement

Transport · I–V · optical

Three research missions

Research
Mission 01

Quantum Light & Information

Single-photon emitters & excitons in engineered 2D interfaces.

Mission 02 · New

Ferroelectric Logic & Memory

Low-power & cryogenic nanoelectronics from 2D ferroelectrics.

Mission 03

Cryogenic & Quantum Electronics

Superconducting & topological hardware for quantum computing.

We Are Recruiting

Open positions for postdoctoral researchers and graduate students with backgrounds in physics, materials science, chemistry, or electrical engineering.

Postdoctoral Researcher

1 vacancy — 2D heterostructure fabrication for QIS. [email protected]

Integrated M.S.–Ph.D. Students

Ongoing recruitment. SKKU Department of Energy Science.

Undergraduate Interns (URP)

SKKU Undergraduate Research Program — each semester.

Research — Areas & Opportunities

Engineering quantum states in solid-state materials.

One platform — atomically precise growth — driving quantum light, ferroelectric low-power electronics, and cryogenic quantum hardware.

One platform, three missions

How our research connects

Everything starts from a single capability — atomically precise growth. The same crystals and tools then drive three application missions: engineering quantum light, building ferroelectric low-power electronics, and creating cryogenic quantum hardware.

Shared foundation · feeds every mission

Atomic-Layer Synthesis Platform

Wafer-scale, phase-pure epitaxy with atomic-level interface control — MOCVD, source-confined CVD, and ML-guided growth.

grows ↓
Mission 01

Quantum Light & Information

Manipulating quantum states of light and excitons in engineered 2D interfaces.

Targets
  • Site-defined single-photon emitters
  • Ferroelectric-gated bound excitons
WS₂MoSe₂2D ferroelectrics
Mission 02 · New

Ferroelectric Logic & Memory

Low-power and cryogenic nanoelectronics from 2D ferroelectric devices.

Targets
  • Ferroelectric & negative-capacitance FETs
  • Non-volatile memory
  • Cryogenic nanoelectronics
In₂Se₃AlScNInSe
Mission 03

Cryogenic & Quantum Electronics

Superconducting and topological hardware for quantum computing.

Targets
  • van der Waals transmon qubits
  • Josephson Ferroelectric FET
  • Topological spin–charge devices
FeSePtTe₂Te

Materials × Missions

What each material enables
Material grown ↓  /  Mission →
01 · Quantum Light
02 · Ferroelectric Logic & Memory
03 · Cryogenic & Quantum
TMD semiconductors
WS₂ · MoSe₂
Single-photon emitters
FeFET channels & memory
Cryogenic transport devices
2D ferroelectrics
In₂Se₃ · AlScN · CuInP₂S₆
Bound-exciton control
FeFET · NC-FET · memory
Josephson FeFET · cryogenic nanoelectronics
III–VI compounds
InSe · In₂Se₃ · (In,Ga)Se
Single-photon emitters
Low-power logic channels
Cryogenic nanoelectronics
Topological
PtTe₂ · Te · MoTe₂
Te ferroelectric logic
Spin–charge conversion
Superconductors
FeSe
vdW transmon qubits
Active Ferroelectric-driven
Mission 01

Quantum Light & Information

Build site-defined emitters in 2D interfaces, then program them with ferroelectric fields.

0D/2D MoSe2-WS2 heterostructure for single-photon emission
1.1 · Quantum Emitters

Fabrication of Quantum Emitters

Site-defined single-photon sources from 0D/2D lateral heterostructures, with spatial confinement engineered to control spin and charge dynamics. Wafer-scale WS₂ targets high coherence; Mn doping adds local magnetic moments.

Grows from WS₂MoSe₂
Ferroelectric-induced bound excitons in a 2D channel
1.2 · Excitonics

Ferroelectric-Induced Bound Excitons

Ferroelectric polarization creates spatially programmable bound excitons. Gate-modulated, field-dependent dynamics give dynamical control of quantum emission through field and doping.

Grows from 2D ferroelectrics
Mission 02 · New

Ferroelectric Logic & Memory

2D ferroelectrics as a route to low-power and cryogenic nanoelectronics.

Ferroelectric-gated topological transistor
2.1 · Ferroelectric Devices

Ferroelectric FETs & Negative-Capacitance

2D ferroelectrics (In₂Se₃, AlScN) gate semiconductor channels to build non-volatile ferroelectric FETs, steep-slope negative-capacitance transistors, and low-power memory — extensible to cryogenic nanoelectronics.

Grows from In₂Se₃AlScNCuInP₂S₆
MOCVD growth of Ga:InxSey III-VI compound on sapphire
2.2 · III–VI Semiconductors

III–VI Compound Semiconductors

InSe and In₂Se₃ host rich structural phases and high thermal velocity. We tune composition continuously between InSe and In₂Se₃ and alloy with gallium — (In,Ga)Se — to engineer band structure for low-power channels.

Grows from InSeIn₂Se₃(In,Ga)Se
Mission 03

Cryogenic & Quantum Electronics

Topological and superconducting materials grown into quantum hardware.

Pressure-controlled growth of PtTe2 topological semimetal
3.1 · Topological

Topological Materials

Type-II semimetals and Weyl semiconductors (PtTe₂, Te) with topological protection and spin–charge conversion, grown by solid-state recrystallization for clean, scalable crystals.

Grows from PtTe₂TeMoTe₂
FeSe superconductor: layer-dependent Tc, synthesis, and Josephson junction
3.2 · Superconductors

Superconductors

To overcome quasiparticle poisoning and parasitic two-level systems in 3D Josephson junctions, we pursue a Josephson Ferroelectric FET (Target 1) and van der Waals transmon qubits (Target 2).

Grows from FeSe

Research Sponsors

Institute for Basic Science (IBS) National Research Foundation of Korea (NRF) Sungkyunkwan University (SKKU) Korea Basic Science Institute (KBSI) Brain Korea 21 (BK21 FOUR)

QS LabPeople
A multidisciplinary team across physics, materials science, chemistry & EE.
1 PI1 Postdoc1 Research Assoc.8 Graduate5 Interns
QS Lab group photo
QS Lab · Sungkyunkwan University · 2026

A small group that grows together.

From wafer-scale crystal growth to cryogenic measurement, we work side by side across disciplines — sharing tools, ideas, and the occasional late-night lab run. We're always looking for curious students who want to build quantum technology from the atom up.

Prof. Seunguk Song
SS
Click to change photo
Seunguk Song, Ph.D. (송승욱; 宋昇昱)
Assistant Professor · Energy Science & Energy, SKKU

Dr. Song earned his Ph.D. from UNIST (2021) on synthesis and electrical characterization of van der Waals heterostructures. As postdoctoral fellow at the University of Pennsylvania under Prof. Deep Jariwala, he worked on wafer-scale 2D/3D heterostructure integration for ultra-low power logic, memory, and neuromorphic computing. He joined SKKU as Assistant Professor in 2024.

Education

  • Ph.D. MSE, UNIST (2015–2021)
  • B.S. MSE, Pusan National Univ.
  • Visiting Scholar, Univ. of Minnesota

Awards

  • Postdoc Fellowship, NRF (2021–24)
  • Global Ph.D. Fellowship, NRF (2016–21)
  • KCS SK-Hynix Award (2021)
  • MRS Poster Award, Boston (2017)

Service

  • Nano Korea 2025/26 Committee
  • KCS 2025/26 Committee
  • Referee: Nature, ACS Nano, Adv. Mater.

Experience

  • Asst. Prof., SKKU (2024–present)
  • Postdoc, Univ. Pennsylvania (2021–24)
Postdoctoral Fellows
🔬
We Are Hiring
Postdoctoral Researcher
2D heterostructure fabrication for QIS
Contact: [email protected]
Research Associate
Sooyoung Choi
Sooyoung Choi
Research Associate (Mar 2026)
Received M.S. in Electrical Engineering from the University of Pennsylvania. Joined the lab as Research Associate in March 2026. Research interests include 2D superconductors and twist angle-dependent electronic properties in 2D heterostructures.
Graduate Students
Wonchan Lee
Wonchan Lee
Integrated M.S.-Ph.D. (Mar 2025)
Joined as research assistant in October 2024, transitioned to Integrated M.S.-Ph.D. program in March 2025. Research focuses on quantum phase transitions in 2D transistors and low-power computing technologies leveraging novel quantum phenomena.
Yunjung Cho
Yunjung Cho
Integrated M.S.-Ph.D. (Mar 2025)
Joined as research assistant in November 2024, transitioned to Integrated M.S.-Ph.D. program in March 2025. Research: (1) Large-area epitaxy of 2D semiconductors; (2) 0D quantum dot–TMD heterostructure fabrication.
Inbae Song
Inbae Song
Integrated M.S.-Ph.D. (Mar 2025)
Integrated M.S.-Ph.D. student since March 2025, started as undergraduate intern in January 2025. Research: growth of 2D transition metal tellurides via thermal CVD.
Kangpyo Cho
Kangpyo Cho
Integrated M.S.-Ph.D. (Mar 2025)
Integrated M.S.-Ph.D. student since March 2025, research assistant since February 2025. Focuses on growth of 2D ferroelectric materials for quantum-engineered logic and memory applications.
Jihwan Jeon
Jihwan Jeon
Integrated M.S.-Ph.D. (Sep 2025)
Integrated M.S.-Ph.D. student since September 2025, research assistant since April 2025. Focuses on wafer-scale synthesis of 2D III-VI compound semiconductors for single-photon emitters and ferroelectric memory applications.
Chaehui Lim
Chaehui Lim
Integrated M.S.-Ph.D. (Sep 2025)
Master-PhD Combined Program student since September 2025. Research focuses on MOCVD-based synthesis of lateral in-plane 2D heterostructures for quantum information science applications.
Kyungwu Kwon
Kyungwu Kwon
Graduate Student (Mar 2026)
Undergraduate intern since March 2025, transitioning to graduate student in March 2026. Research on synthesis of 2D topological semimetals and semiconductors for nanoelectronics.
Yerin So
Yerin So
Graduate Student (Mar 2026)
Physics undergraduate at Sookmyung Women's University, research intern since August 2025, graduate studies starting March 2026. Research: 2D superconductors and fundamental physical properties for superconducting qubit applications.
Interns and Undergraduate Research Program (URP)
Seohee Park
Seohee Park
Intern (Sep 2025)
Undergraduate intern since September 2025. Research: synthesizing 2D ferroelectric materials and fabricating devices for next-generation semiconductor applications.
Taeyoung Jeon
Taeyoung Jeon
Undergrad Intern
Chemical Engineering undergraduate. Research: MOCVD-based synthesis of 2D heterostructures and their applicability.
Sungwoo Yoon
Sungwoo Yoon
Undergrad Intern
Chemical Engineering undergraduate. Research: wafer-scale synthesis of PtTe₂ via TCVD for next-generation semiconductor interconnects and spintronics.
Minseok Kim
Minseok Kim
Intern (Mar 2026)
Undergraduate intern since March 2026. Research: quantum transport in 2D ferroelectric devices and low-power circuit design.
Minseo Kim
Minseo Kim
Intern (Apr 2026)
Energy undergraduate, intern since April 2026. Research: CVD synthesis of 2D heterostructures for low-power, high-performance computing.
Minseong Choi
Minseong Choi
Intern (Mar 2026)
Undergraduate intern since March 2026. Research: growth and characterization of 2D layered materials for energy and electronic applications.
JL
Juhyung Lee
URP (Mar 2026)
Chemical Engineering major, URP since March 2026. Research: ML-based analysis of 2D materials for next-generation semiconductors.
DO
Dahyeon Oh
URP (Mar 2026)
Chemical Engineering major, URP since March 2026. Research: epitaxial growth control of wafer-scale WS₂ via MOCVD and data-driven optimization.
HK
Hyeonsu Kim
URP
Advanced Materials Science and Engineering major. Research: growth of 2D ferroelectric materials and integration into ferroelectric-gated Te FETs.
SL
Seoyoung Lim
URP (Mar 2026)
Chemical Engineering major, URP since March 2026. Research: growth and electrical properties of 2D semiconductor thin films via MOCVD.
SJ
Sangmin Joo
URP
Advanced Materials Science and Engineering major. Research: CVD growth of 2D materials and investigation of electronic/structural properties for device applications.
SY
Siwon Yang
URP
URP participant. Research: intercalation of MoTe₂ for modulating material properties for next-generation semiconductor applications.
JK
Jaeho Kang
URP
Chemical Engineering major. Research: MOCVD growth of 2D III-VI semiconductors and ferroelectric properties for electronic/optoelectronic applications.
Institute Joint Researchers
Juueun Park
KICET
Doyeol Ko
KITECH
Shujin Lee
KITECH
Kyung-Rok Kang
KITECH
Alumni
Dr. Nasir Ali
Dr. Nasir Ali
Alumni (ex-Postdoc) · 2020–2025
Received B.Sc./M.Sc. from Aligarh Muslim University and Ph.D. in Physics from Jawaharlal Nehru University (2020). Postdoc at SAINT, SKKU (2020–2025). Research focused on quantum phase metal-insulator transitions, metallic transport, and critical phenomena in 2D materials via semimetal and 2D metallic contacts.
Chengyun Hong
Alumni (ex-Ph.D.) · → Postdoc, POSTECH MSE
Alumni — Hyemyeong Lee · Hyungjeong Lee · Yunyeong Kim · Gunmo Koo · Sangwon Yun · Eunpyo Lee
QS LabPublications
Peer-reviewed work in 2D materials, quantum devices & nanoelectronics. * corresponding · † co-first
38
Papers
5+
Nature family
2018–26
Span
Representative Papers
Pending / Under Review
34
Reconfigurable, non-volatile control of optical anisotropy in ReS₂ via ferroelectric gating
Mahfujur Rahaman†, Seunguk Song†*, Aaliyah C. Khan, Bongjun Choi, Aaron M. Schankler, Kwan-Ho Kim, Wonchan Lee, Jason Lynch, Hyeon Suk Shin, Andrew M. Rappe, Deep Jariwala*
Under review (Sept 2025) · arXiv:2509.11897
33
Observation of giant remnant polarization in ultrathin AlScN at cryogenic temperatures
Seunguk Song†, Dhiren K. Pradhan†, Zekun Hu†, Yinuo Zhang, Rachael N. Keneipp, Michael A. Susner, Pijush Bhattacharya, Marija Drndić, Roy H. Olsson III*, Deep Jariwala*
Under revision (June 2025) · arXiv:2503.19491
2026
31
Indium selenides for next-generation low-power computing devices
Seunguk Song*, Michael Altvater, Wonchan Lee, Hyeon Suk Shin, Nicholas Glavin*, Deep Jariwala*
Nature Reviews Electrical Engineering (2026)
2025
27
Metal-organic chemical vapour deposition of van der Waals 2D chalcogenides and heterostructures: a review
Yunjung Cho, Wonchan Lee, Inbae Song, Kangpyo Cho, Jihwan Jeon, Nasir Ali, Seunguk Song*
Nanoscale, 17, 22606-22628 (2025)
26
Interfacial Control of Degradation Pathways in 2D Heterostructures
Yeoseon Sim, Se-Yang Kim, Soon-Dong Park, Hyeonwoo Lee, Jeong Hwa Kim, Sora Jang, Jaewon Wang, Seunguk Song, Jinsung Kwak, Zonghoon Lee, Changwook Jeong, Sung Youb Kim*, Soon-Yong Kwon*
Advanced Functional Materials (2025)
25
Reconfigurable single-walled carbon nanotube ferroelectric field-effect transistors
Dongjoon Rhee, Kwan-Ho Kim, Jeffrey Zheng, Seunguk Song, Lian-Mao Peng, Roy H. Olsson III, Joohoon Kang*, Deep Jariwala*
Nature Communications, 16, 7655 (2025)
23
High Current and Carrier Densities in 2D MoS₂/AlScN Field-Effect Transistors via Ferroelectric Gating and Ohmic Contacts
Seunguk Song†, Kwan-Ho Kim†, Rachael Keneipp, Myeongjin Jung, Nicholas Trainor, Chen Chen, Jeffrey Zheng, Joan M. Redwing, Joohoon Kang, Marija Drndić, Roy H. Olsson III, Deep Jariwala*
ACS Nano, 15, 8985-8996 (2025)
2024
22
Confinement of excited states in two-dimensional, in-plane, quantum heterostructures
Gwangwoo Kim, Benjamin Huet, Christopher E. Stevens, Kiyoung Jo, Jeng-Yuan Tsai, Saiphaneendra Bachu, Meghan Leger, Seunguk Song, Mahfujur Rahaman, Kyung Yeol Ma, Nicholas R. Glavin, Hyeon Suk Shin, Nasim Alem, Qimin Yan, Joshua R. Hendrickson, Joan M. Redwing, Deep Jariwala*
Nature Communications, 15, 6361 (2024)
19
Can 2D semiconductors be game changers for nanoelectronics and photonics?
Seunguk Song†, Mahfujur Rahaman†, Deep Jariwala*
ACS Nano, 18, 10955-10978 (2024)
18
Tuning Polarity in WSe₂/AlScN FeFETs via Contact Engineering
Kwan-Ho Kim†, Seunguk Song†, Bumho Kim, Pariasadat Musavigharavi, Nicholas Trainor, Keshava Katti, Chen Chen, Shalini Kumari, Jeffrey Zheng, Joan M. Redwing, Eric A. Stach, Roy H. Olsson III, Deep Jariwala*
ACS Nano, 18, 4180-4188 (2024)
2023
14
Scalable CMOS back-end-of-line-compatible AlScN/two-dimensional channel ferroelectric field-effect transistors
Kwan-Ho Kim, Seyong Oh, Merrilyn Mercy Adzo Fiagbenu, Jeffrey Zheng, Pariasadat Musavigharavi, Pawan Kumar, Nicholas Trainor, Areej Aljarb, Yi Wan, Hyong Min Kim, Keshava Katti, Seunguk Song, Gwangwoo Kim, Zichen Tang, Jui-Han Fu, Mariam Hakami, Vincent C. Tung, Joan M. Redwing, Eric A. Stach, Roy H. Olsson III*, Deep Jariwala*
Nature Nanotechnology, 18, 1044-1050 (2023)
13
Negative capacitance field-effect transistors based on ferroelectric AlScN and 2D MoS₂
Seunguk Song†, Kwan-Ho Kim†, Srikrishna Chakravarthi†, Zirun Han, Gwangwoo Kim, Kyung Yeol Ma, Hyeon Suk Shin, Roy H. Olsson III, Deep Jariwala*
Applied Physics Letters, 123, 183501 (2023)
12
Wafer-scale growth of two-dimensional, phase-pure InSe (Featured Article)
Seunguk Song, Sungho Jeon, Mahfujur Rahaman, Jason Lynch, Dongjoon Rhee, Pawan Kumar, Srikrishna Chakravarthi, Gwangwoo Kim, Xingyu Du, Eric Blanton, Mike Snure, Kim Kisslinger, Nicholas R. Glavin, Eric A. Stach, Troy Olsson, Deep Jariwala*
Matter, 6, 3483-3498 (2023)
11
Fabrication of p-type 2D single-crystalline transistor arrays with Fermi-level-tuned van der Waals semimetal electrodes
Seunguk Song†, Aram Yoon†, Sora Jang†, Jason Lynch, Jihoon Yang, Juwon Han, Young Ho Jin, Cindy Yueli Chen, Yeryun Cheon, Jinsung Kwak, Changwook Jeong, Hyeonsik Cheong, Deep Jariwala, Zonghoon Lee*, Soon-Yong Kwon*
Nature Communications, 14, 4747 (2023)
2022
8
Atomic transistors based on seamless lateral metal-semiconductor junctions with a sub-1-nm transfer length
Seunguk Song, Aram Yoon, Jong-Kwon Ha, Jihoon Yang, Sora Jang, Chloe Leblanc, Jaewon Wang, Yeoseon Sim, Deep Jariwala, Seung Kyu Min, Zonghoon Lee*, Soon-Yong Kwon*
Nature Communications, 13, 4916 (2022)
2021
2020
5
Wafer-scale production of patterned transition metal ditelluride layers for 2D metal-semiconductor contacts at the Schottky–Mott limit
Seunguk Song, Yeoseon Sim, Se-Yang Kim, Jung Hwa Kim, Inseon Oh, Woong Ki Na, Do Hee Lee, Jaewon Wang, Shili Yan, Yinan Liu, Jinsung Kwak, Jian-Hao Chen, Hyeonsik Cheong, Jung-Woo Yoo, Zonghoon Lee, Soon-Yong Kwon*
Nature Electronics, 3, 207-215 (2020)
2019
2
Electrically robust single-crystalline WTe₂ nanobelts for nanoscale electrical interconnects (Frontispiece)
Seunguk Song, Se-Yang Kim, Jinsung Kwak, Yongsu Jo, Jung Hwa Kim, Jong Hwa Lee, Jae-Ung Lee, Jong Uk Kim, Hyung Duk Yun, Yeoseon Sim, Jaewon Wang, Do Hee Lee, Shi-Hyun Seok, Tae-il Kim, Hyeonsik Cheong, Zonghoon Lee, Soon-Yong Kwon*
Advanced Science, 6, 1801370 (2019)
2018
1
Single-crystalline nanobelts composed of transition metal ditellurides
Jinsung Kwak, Yongsu Jo, Seunguk Song, Jung Hwa Kim, Se-Yang Kim, Jae-Ung Lee, Sungwoo Lee, Jungmin Park, Kangwon Kim, Gun-Do Lee, Jung-Woo Yoo, Sung Youb Kim, Young-Min Kong, Gwan-Hyoung Lee, Wan-Gyu Lee, Jucheol Park, Xiaodong Xu, Hyeonsik Cheong, Euijoon Yoon, Zonghoon Lee, Soon-Yong Kwon*
Advanced Materials, 30, 1707260 (2018)
QS LabEquipment & Facilities
Synthesis & characterization at N-Center, SKKU.
In-houseIBS 2DQH · AQTCINAP

Lab-Dedicated Instruments

QS Lab · in-house

Core synthesis and low-temperature transport systems operated solely by our group at N Center, SKKU — the backbone of our day-to-day growth and device measurement.

Cold-Wall MOCVD system
01
Cold-Wall MOCVD
III–VI Compound Semiconductors

Metal-organic CVD with cold-wall reactor for wafer-scale growth of III–VI compound semiconductors — InSe, In₂Se₃, and GaₓIn₁₋ₓSeᵧ alloys — with controlled composition and layer number.

MOCVDInSe · In₂Se₃(In,Ga)SeWafer-scale
MOCVD Quantum Heterostructures system
02
Cold-Wall MOCVD
Superconductors & vdW Heterostructures

Dedicated MOCVD with in-situ monitoring for FeSe₁₋ₓTeₓ topological superconductor films and lateral in-plane 2D heterostructures.

HeterostructuresFeSeTeTopological SC
Thermal CVD system
03
Thermal CVD
Topological Semimetals & Chalcogenides

Tube-furnace CVD for PtTe₂, WTe₂, MoTe₂, CuCrP₂S₆, CuCrS₂. SCVD protocols with halide salt precursors.

Thermal CVDDitelluridesSCVD
Cryogenic Probe Station
04
Cryogenic Probe Station
Magnetotransport & Superconductivity

Low-temperature transport to ≈4 K with magnetic fields. BKT transitions, quantum phase transitions, magnetotransport.

Cryogenic 4KMagnetotransportBKT
Optical microscopy & device wiring station
05
Optical Microscopy & Device Wiring
Sample Preparation

Optical microscopy with micromanipulator for layer identification, wire bonding, and probe contacts.

OpticalLayer IDWire bonding
Hot-wall MOCVD system
06
Hot-Wall MOCVD
TMD Semiconductor Growth

Hot-wall metal-organic CVD for wafer-scale growth of 2D semiconductors such as WS₂ and MoSe₂ with uniform layer control.

MOCVDHot-wallWS₂ · MoSe₂

Shared Fab Facilities

Our member centers

Beyond our own systems, our group is a participating group of the IBS Center for 2D Quantum Heterostructures (2DQH) and a member of SKKU's shared-instrument centers — so the instruments below are part of our everyday workflow, not occasional collaborations.

SKKU AQT · operated by IBS 2DQH · in our building

Advanced Quantum Technology Instrumentation Center

성균관대학교 양자기술첨단기기센터 · N-Center C, Rm 86275

AQT is operated under the IBS Center for 2D Quantum Heterostructures (2DQH), which our group is part of — and it shares our building at N-Center, so its core systems sit steps from our growth reactors.

01
Cs-corrected STEM / TEM
JEM-ARM300CF · ARM200CF

Aberration-corrected scanning/transmission electron microscopy with EDS and EELS — atomic-scale structure and chemistry of 2D crystals, defects, and heterointerfaces.

Atomic-resSTEM/TEMEDSEELS
02
PPMS Dynacool
Cryogenic Magnetotransport

Cryogen-free physical property measurement at 1.8–400 K and up to 14 T (and 9 T) — magnetotransport, Hall, and superconducting characterization of our devices.

1.8–400 K14 THall
03
X-ray Diffractometer
SmartLab 9 kW

High-resolution X-ray diffraction for phase identification, crystal orientation, and thin-film structural analysis of as-grown 2D layers.

XRDThin-filmPhase
04
Confocal Raman Imaging
2D Layer Characterization

Confocal Raman mapping for layer number, strain, doping, and quality across wafer-scale as-grown 2D semiconductors.

RamanImagingLayer ID
05
Ultra-low-frequency Raman
Interlayer Phonons

Access to ultra-low-frequency shear and breathing modes to probe interlayer coupling and stacking order in van der Waals heterostructures.

Low-freq RamanInterlayerStacking
06
THz Near-field Microscope
Nanoscale Optics · SNOM

Terahertz scanning near-field optical microscopy for sub-diffraction conductivity and carrier-density imaging, complemented by femtosecond transient-absorption and time-resolved PL.

THzSNOMUltrafast
SKKU CINAP

Center for Integrated Nanostructure Physics

성균관대학교 나노물리과학연구소

Our lab is affiliated with CINAP, whose nanofabrication cleanroom provides the full device process flow — deposition, lithography, and etching — to turn our crystals into devices.

A full nanofabrication cleanroom — the standard process tools we use to build devices.
01
E-beam Evaporator
Metal Deposition

Electron-beam evaporation of high-purity metals for source/drain contacts and gate electrodes.

EvaporationContacts
02
Sputtering System
Thin-Film Deposition

Sputter deposition of metals and dielectrics for device stacks and encapsulation layers.

SputterDielectrics
03
E-beam Lithography
Nanoscale Patterning

Direct-write electron-beam lithography for sub-100 nm device geometries and fine electrodes.

EBLSub-100 nm
04
Mask Aligner
Photolithography

UV contact-aligner photolithography for rapid, wafer-scale device patterning.

PhotolithoWafer-scale
05
Reactive Ion Etcher
Dry Etching

Plasma-based reactive ion etching for anisotropic pattern transfer and layer thinning.

RIEPlasma etch
QS LabTeaching
Courses by Prof. Seunguk Song.
Dept. of Energy ScienceDept. of Energy · SKKU
2026 Spring
UG / Master

Nanoscale Surface and Thin Film Science

ESC4023-41
Thin film engineering — deposition fundamentals, vacuum technology, surface science, microstructure control, and analytical characterization.
Undergraduate

Mathematics for Energy

COO2002
Mathematical modeling for energy systems. Translating physical phenomena into frameworks for design, analysis, and optimization.
2025 Fall
UG / Master

Low-Power Semiconductor Process

Semiconductor fabrication: diffusion, oxidation, lithography, deposition, CMOS integration.
Thursday 15:00–16:15, 16:30–17:45
Graduate

Low-Dimensional Heterostructures and Electrical Devices

2D material properties, band structure engineering, ferroelectric transistors, low-energy computing platforms.
Friday 15:00–16:15, 16:30–17:45
2025 Spring
UG / Master

Nanoscale Surface and Thin Film Science

ESC4023-41
Same curriculum as 2026 Spring.
Friday 15:00–16:15, 16:30–17:45
Graduate

Introduction to Low-Dimensional van der Waals Materials

ESC518-41
2D material fundamentals, analytical tools, vdW heterostructures and applications.
Thursday 15:00–16:15, 16:30–17:45
2024 Fall
Graduate

Energy Nanomaterials 1 (에너지나노소재1)

ESC5002-41
Energy-efficient electrical devices: materials science and chemistry.
Thursday 12:00–13:15, 13:30–14:45
QS LabNews & Gallery
Publications, awards, grants & events from the lab.
Mar 2026
Latest update
2026-03-20

Sooyoung Choi joins as Research Associate

Sooyoung Choi has officially joined our group as a Research Associate (effective March 19, 2026). She earned her M.S. in Electrical Engineering from the University of Pennsylvania, bringing expertise in next-generation quantum materials.

2026-03-19

Prof. Song selected as Nanoscale 2026 Emerging Investigator

Prof. Seunguk Song has been selected as a Nanoscale 2026 Emerging Investigator by the Royal Society of Chemistry (RSC). Our MOCVD review is featured in the themed collection.

Prof. Song selected as Nanoscale 2026 Emerging Investigator
2026-03-02

New undergraduate interns join QS Lab

Taeyoung Jeon, Minseok Kim, Seonwoo Youn, Juhyung Lee, Dahyeon Oh, Hyeonsu Kim, Seoyoung Lim, Sangmin Joo, Siwon Yang, and Jaeho Kang have joined QS Lab as undergraduate interns. Welcome, all!

2026-01-28

33rd Korean Conference on Semiconductors

All QS Lab members participated in the 33rd Korean Conference on Semiconductors (반도체학술대회). Three graduate students presented research posters and engaged in active discussions.

33rd Korean Conference on Semiconductors
2026-01-26

International Joint Workshop with NUS IFIM (Singapore)

We organized an international joint workshop with the Institute for Functional Intelligent Materials (IFIM) at the National University of Singapore, with talks, open discussions, and a lab tour.

International Joint Workshop with NUS IFIM (Singapore)
2026-01-06

Nature Reviews Electrical Engineering — Indium selenides review published

Our Perspective “Indium selenides for next-generation low-power computing devices” is published in Nature Reviews Electrical Engineering.

Nature Reviews Electrical Engineering — Indium selenides review published
2026-01-05

Gunmo Koo joins as undergraduate intern

Gunmo Koo has joined QS Lab as an undergraduate intern. Welcome, Gunmo!

2025-12-12

Joint Workshop with IBS & University of Cambridge at ICAMD, Busan

Our lab, the IBS Center for 2D Quantum Heterostructures, and the University of Cambridge held a joint workshop at ICAMD in Busan — with talks by Profs. Mete Atatüre, Andrea Ferrari, and Manish Chhowalla.

Joint Workshop with IBS & University of Cambridge at ICAMD, Busan
2025-11-21

Device (Cell Press) — Low-voltage ferroelectric FET paper published

Our collaborative work “Low-voltage ferroelectric field-effect transistors with ultrathin aluminum scandium nitride and 2D channels” is published in Device, 4, 100989 (2025).

Device (Cell Press) — Low-voltage ferroelectric FET paper published
2025-10-31

Small Science — Edge-contacted nanosheet transistor paper published

Our work demonstrating wafer-scale fabrication of edge-contacted MoTe₂ nanosheet transistors via alloying-mediated phase engineering is published in Small Science.

Small Science — Edge-contacted nanosheet transistor paper published
2025-10-28

Sangwon Yun joins as undergraduate intern

Sangwon Yun has joined QS Lab as an undergraduate intern. Welcome, Sangwon!

2025-10-14

Joint Workshop with Active Soft Materials & Robots Lab

Our Quantum Semiconductors Lab held a joint workshop with the Active Soft Materials & Robots Lab (Mechanical Engineering, SKKU), planning a collaborative project on ionic-gel–based damage-free transfer of 2D materials.

Joint Workshop with Active Soft Materials & Robots Lab
2025-09-24

Nanoscale review — MOCVD of 2D chalcogenides published

Our review “Metal-organic chemical vapour deposition of van der Waals 2D chalcogenides and heterostructures” is published in Nanoscale.

Nanoscale review — MOCVD of 2D chalcogenides published
2025-09-08

Seohee Park joins as undergraduate intern

Seohee Park has joined QS Lab as an undergraduate intern. Welcome, Seohee!

2025-09-06

Advanced Functional Materials — Interfacial control in 2D heterostructures

Our collaborative study “Interfacial Control of Degradation Pathways in 2D Heterostructures” is published in Advanced Functional Materials.

Advanced Functional Materials — Interfacial control in 2D heterostructures
2025-08-17

Nature Communications — Reconfigurable carbon-nanotube ferroelectric FET published

Our collaborative work “Reconfigurable single-walled carbon nanotube ferroelectric field-effect transistors” is published in Nature Communications, 16, 7655 (2025).

Nature Communications — Reconfigurable carbon-nanotube ferroelectric FET published
2025-08-11

Chaehui Lim joins as graduate student

Chaehui Lim has joined QS Lab as a graduate student. Welcome, Chaehui!

2025-08-04

Yerin So joins as undergraduate intern

Yerin So has joined QS Lab as an undergraduate intern. Welcome, Yerin!

2025-08-01

Dr. Nasir Ali joins as postdoctoral researcher

Dr. Nasir Ali has joined QS Lab as a postdoctoral researcher, focusing on quantum-phase metal–insulator transitions, metallic transport, and critical phenomena in 2D materials. Welcome, Nasir!

2025-07-31

IBS Global Partner Lab with University of Cambridge (2025–2031)

As a participating group of the IBS Center for 2D Quantum Heterostructures (2DQH), our lab began collaboration with the University of Cambridge’s Cavendish Laboratory through the IBS Global Partner Lab.

IBS Global Partner Lab with University of Cambridge (2025–2031)
2025-07-15

IBS 2DQH 2025 Summer Workshop, Vivaldi Park

From July 15–17, 2025 we joined the IBS 2DQH Summer Workshop at Vivaldi Park, Hongcheon — sharing current research and discussing future plans across the 2DQH center.

IBS 2DQH 2025 Summer Workshop, Vivaldi Park
2025-07-01

Ceramist — Review on electrical measurement of 2D transistors published

Kyungwu Kwon published a first-author review “Methodologies for Electrical Measurement and Parameter Analysis of 2D Semiconductor Transistors” in Ceramist.

Ceramist — Review on electrical measurement of 2D transistors published
2025-03-04

New graduate students join QS Lab

Wonchan Lee, Yunjung Cho, Inbae Song, and Kangpyo Cho have joined QS Lab as graduate students.

2025-03-01

National research project awarded — vdW ferroelectric transistors

Awarded a national research project, “Development of Quantum Phase Transition Non-Volatile Control Technology via Large-Area van der Waals Ferroelectric Transistors,” funded by MSIT and the NRF of Korea (2025.03–2030.02).

2025-03-01

National research infrastructure awarded — Cold-Wall MOCVD

Selected for a national research-infrastructure project to establish a Cold-Wall MOCVD system for quantum-semimetal synthesis, funded by MSIT and the Korea Basic Science Institute (2025.03–2026.02).

2025-02-26

ACS Nano — High-performance MoS₂/AlScN FeFET paper published

Our paper “High Current and Carrier Densities in 2D MoS₂/AlScN Field-Effect Transistors via Ferroelectric Gating and Ohmic Contacts” is published in ACS Nano.

ACS Nano — High-performance MoS₂/AlScN FeFET paper published
2024-09-02

Participation in the BK21 FOUR program

QS Lab is participating in the BK21 FOUR Educational and Research Group for Fostering Innovative Talents in Integrated Renewable Energy Systems, funded by MOE and MSIT (through 2027).

2024-08-01

QS Lab at SKKU officially started!

The Quantum Semiconductor Laboratory at Sungkyunkwan University has officially started. We are located at N Center 3F #86383, SKKU.

QS Lab at SKKU officially started!
2024-08-01

SKKU 2024 Start-up Fund awarded

Received funding through the 2024 Start-up Fund Support Program by Sungkyunkwan University (2024.08–2026.07).

2024-08-01

IBS collaborative project joined

Participating in the IBS collaborative project “Correlation between Structure and Properties of Quantum Heterostructures at the Atomic Scale,” funded by MSIT (from 2024, for eight years).

QS LabContact & Openings
Find us at N-Center, SKKU · We are recruiting.
RecruitingGraduate studentsPostdoc

Quantum Semiconductor Laboratory

Address
N Center 3F #86383, Sungkyunkwan University (SKKU)
2066 Seobu-ro, Cheoncheon-dong, Jangan-gu, Suwon-si, Gyeonggi-do, South Korea
주소
16419 경기도 수원시 장안구 서부로 2066, 성균관대학교 N센터 86383호
PI
Prof. Seunguk Song

Open positions

Join the lab

We are recruiting motivated undergraduates, graduate students, and postdoctoral researchers interested in low-dimensional semiconductor synthesis and quantum technologies. Our work spans chemistry, chemical engineering, physics, electrical engineering, and materials science. We offer full tuition scholarships, top-tier stipends, publication incentives, and support for international research exchange.

Graduate students · M.S.–Ph.D. / Ph.D.

Low-dimensional materials for emerging computing & quantum information

Enrollment in the Department of Energy Science, SKKU, with research scholarship and stipend per SKKU and project regulations, plus international collaboration and conference opportunities.

What you'll work on
  • MOCVD growth of low-temperature, large-area 2D materials
  • Transfer & patterning of heterostructure devices
  • Single-photon emission characterization (photon correlation, low-T spectroscopy)
  • Structural & chemical analysis
Who we're looking for
  • B.S. or M.S. in materials science, chemical engineering, physics, EE, chemistry, or related
  • Basic understanding of semiconductor physics (coursework is sufficient)
Postdoctoral researcher

Quantum information science with 2D semiconductor heterostructures

One-year contract (renewable), full-time, with competitive salary commensurate with experience. Experience in photonics is preferred.

What you'll work on
  • MOCVD growth of low-temperature, large-area 2D materials
  • Transfer & patterning of heterostructure devices
  • Single-photon emission characterization
  • Structural & chemical analysis
Who we're looking for
  • Ph.D. in a relevant field (or expected by start date)
  • Strong proposal/manuscript writing and communication skills
Interested? Email a single PDF (CV + transcript + a short statement of research interest) to [email protected]. Selection is by document review, an interview with research presentation and lab tour (Zoom option available), and final guidance on the SKKU graduate application.