Graded Crystalline HfO₂ Gate Dielectric Layer for High-k/Ge MOS Gate Stack

Chan Ho Lee, Jeong Yong Yang, Junseok Heo,* and Geonwook Yoo*

IEEE Journal of the Electron Devices Society 9, 295 (2021), DOI: 10.1109/JEDS.2021.3058631

Pt-Decorated Graphene Gate AlGaN/GaN MIS-HEMT for Ultrahigh Sensitive Hydrogen Gas Detection

Jungho Ahn, Dahee Kim, Kyung-Ho Park, Geonwook Yoo,* and Junseok Heo* 

IEEE Transactions on Electron Devices 68, 1255 (2021) , DOI: 10.1109/TED.2021.3053515

Ultrahigh Deep-Ultraviolet Responsivity of a β-Ga₂O₃/MgO Heterostructure-Based Phototransistor

Jungho Ahn, Jiyeon Ma, Doeon Lee, Qiubao Lin, Youngseo Park, Oukjae Lee, Sangwan Sim, Kyusang Lee,* Geonwook Yoo,* and Junseok Heo*

ACS Photonics 8, 557 (2021), DOI: 10.1021/acsphotonics.0c01579

A comparative study of charge trapping effect in p-type MoTe₂ and WSe₂ FETs using pulsed current voltage measurements

Jeong Yong Yang, Chan Ho Lee, Young Taek Oh, Jiyeon Ma, Junseok Heo,* and Geonwook Yoo* 

Japanese Journal of Applied Physics 60, 011003 (2021), DOI: 10.35848/1347-4065/abd6d5

Side-chain engineering of conjugated polymers toward highly efficient near-infrared organic photo-detectors via morphology and dark current management

Yeongkwon Kang, Hyeong Ju Eun, Hyojin Kye, Dahee Kim, Junseok Heo, Jong H. Kim, and Bong-Gi Kim

Journal of Materials Chemistry C 8, 7765 (2020), DOI: 10.1039/D0TC00082E 

Hetero-integration enables fast switching time-of-flight sensors for light detection and ranging

Minseong Park, Yongmin Baek, Mesgana Dinare, Doeon Lee, Kyung-Ho Park, Jungho Ahn, Dahee Kim, Joseff Medina, Won-Jin Choi, Sihwan Kim, Changjie Zhou, Junseok Heo, and Kyusang Lee

Scientific Reports 10, 2764 (2020), DOI: 10.1038/s41598-020-59677-x

Improved visible-blindness of AlGaN deep ultraviolet photodiode with monolithically integrated angle-insensitive Fabry-Perot filter

Dohyun Kim, Seungho Han, Joocheol Jung, Yongmin Baek, John Son, Kyusang Lee, and Junseok Heo*

Optics Express 27, 37446 (2019), DOI: 10.1364/OE.27.037446

Performance improvement of III-V compound solar cells using nanomesh electrode and nanostructured antireflection structures

Li-Yi Jian, Chun-Ning Wu, Hsin-Ying Lee, Junseok Heo, and Ching-Ting Lee 

Solar Energy 188, 51 (2019), DOI: 10.1016/j.solener.2019.05.066

Modeling and simulation study of reduced self-heating in bottom-gate β-Ga₂O₃ MISFETs with a h-BN gate insulator

Sangwook Jo, Geonwook Yoo, and Junseok Heo

Journal of the Korean Physical Society 74, 1171 (2019), DOI: 10.3938/jkps.74.1171

Asymmetric double-gate β-Ga₂O₃ nanomembrane field-effect transistor for energy-efficient power devices

Jiyeon Ma, Hyung Jun Cho, Junseok Heo, Sunkook Kim, and Geonwook Yoo 

Advanced Electronic Materials 5, 1800938 (2019), DOI: 10.1002/aelm.201800938

Enhanced Photoresponsivity of Multilayer MoS₂ Phototransistor Using Localized Au Schottky Junction Formed by Spherical-Lens Photolithography

Sanghyun Lee, Jinwoo Park, Yeojun Yun, Jaejin Lee, and Junseok Heo* 

Advanced Materials Interfaces 6, 1900053 (2019), DOI: 10.1002/admi.201900053

CdSe/ZnS quantum dot encapsulated MoS₂ phototransistor for enhanced radiation hardness

Jinwu Park, Geonwook Yoo, and Junseok Heo* 

Scientific Reports 9, 1411 (2019), DOI: 10.1038/s41598-018-37902-y

Threshold Voltage Tuning in Multilayer MoS₂ Transistors via Fluorine-Based Plasma Treatment

Geonwook Yoo, Jiyeon Ma, Youngseo Park, So Hyeon Kim, Young Woo Joo, Junseok Heo, Min Suk Oh 

Science of Advanced Materials 10, 1427 (2018), DOI: 10.1166/sam.2018.3346

Photoacoustic Energy Sensor for Nanosecond Optical Pulse Measurement

Pil Gyu Sang, Junseok Heo, Hui Joon Park, and Hyoung Won Baac 

Sensors 18, 3879 (2018), DOI: 10.3390/s18113879

Bias-Dependent Photoresponsivity of Multi-Layer MoS₂ Phototransistors

Jinwu Park, Youngseo Park, Geonwook Yoo, and Junseok Heo*

Nanoscale Research Letters 12, 599 (2017), DOI: 10.1186/s11671-017-2368-2

Wavelength-selective enhancement of photo-responsivity in metal-gated multi-layer MoS₂ phototransistors

Sanghyun Lee, Youngseo Park, Geonwook Yoo, and Junseok Heo*

Applied Physics Letters 111, 223106 (2017), DOI: 10.1063/1.5003315

1.3 um Optical Interconnect on Silicon: A Monolithic III-Nitride Nanowire Photonic Integrated Circuit

Arnab Hazari, Fu Chen Hsiao, Lifan Yan, Junseok Heo, Joanna Mirecki Millunchick, John M. Dallesasse, and Pallab Bhattacharya 

IEEE Journal of Quantum Electronics 53, 6300109 (2017), DOI: 10.1109/JQE.2017.2708526

Al_XGa_1-XN cladding effect on intraband absorption of InGaN disk embedded in GaN nanowire

Afroja Akter, Geonwook Yoo, Sangin Kim, Hyoung Won Baac, and Junseok Heo*

Journal of Nanoscience and Nanotechnology 17, 3279 (2017), DOI: 10.1166/jnn.2017.14060

Enhanced photoresponsivity of multilayer MoS₂ transistors using high work function MoO_x overlayer

Geonwook Yoo, Seongin Hong, Junseok Heo, and Sunkook Kim

Applied Physics Letters 110, 053112 (2017), DOI: 10.1063/1.4975626

Flexible and wavelength-selective MoS₂ phototransistors with monolithically integrated transmission color filters

Geonwook Yoo, Sol Lea Choi, Sang Jin Park, Kyu-Tae Lee, Sanghyun Lee, Min Suk Oh, Junseok Heo,* and Hui Joon Park*

Scientific Reports 7, 40945 (2017), DOI: 10.1038/srep40945