PUBLICATIONS

Homogeneous ZrO2 gate dielectrics with intermediate ozone oxidation for improved interface stability and leakage suppression in Ge-based MOS devices

J Lee, H Choi, J Heo

Materials Science in Semiconductor Processing 192, 109435

Vertically Stacked Broadband GNIF-MoS2/p-Ge Photodetector for Dark Current Suppression, High Photoresponse, and Ultrafast Transient Response

RK Pandey, H Choi, YH Kim, S Jeong, Y Kim, J Heo

Advanced Optical Materials 12 (31), 2401363

Network of artificial olfactory receptors for spatiotemporal monitoring of toxic gas

Y Baek, B Bae, J Yang, W Cho, I Sim, G Yoo, S Chung, J Heo, K Lee

Science Advances 10 (42), eadr2659

Optical sensor having 2d-3d heterojunction structure and manufacturing method thereof

HEO Junseok, A Hwang, P Youngseo

US Patent App. 18/032,720

High Detectivity Near Infrared Organic Photodetectors Using an Asymmetric Non-Fullerene Acceptor for Optimal Nanomorphology and Suppressed Dark Current

Jong-Woon Ha, Ah Young Lee, Hyeong Ju Eun, Jae-Hyun Kim, Hyungju Ahn, Sungjun Park, Changjin Lee, Deok Won Seo, Junseok Heo, Sung Cheol Yoon, Seo-Jin Ko, and Jong H. Kim

ACS Nano 2023 17 (19), 18792-18804, DOI: 10.1021/acsnano.3c03171

Novel SHAL base derived cobalt containing organic semiconducting metallogel thin film for self-powered high-performance photodetector application

Vinay Kumar Pandey, Young Hoon Kim, Hwayong Choi, Mrigendra Dubey, Sayad Hadi Hasan, Junseok Heo, Rajiv Kumar Pandey

Optical Materials 143, 114178(2023), DOI: https://doi.org/10.1016/j.optmat.2023.114178

Facile controlled synthesis of bifunctional ZnO nanoparticles for application as a high-performance self-powered UV photosensor and highly selective vapor sensor

Rajiv Kumar Pandey, Hwayong Choi, Junsin Yi, Junseok Heo, Praveen Kumar Sahu

Materials Science and Engineering: B 293, 116470 (2023), DOI: 10.1016/j.mseb.2023.116470

Cationic Molecular Metal Chalcogenide Ligand-Passivated Colloidal Quantum Dots and Their Application to Suppressed Dark-Current Near-Infrared Photodetectors

Haewoon Seo, Hyeong Ju Eun, Donghyeuk Choi, Hyon Bin Na, Yeongseok Shim, Junseok Heo, Kyung-Sang Cho, Jong H Kim, Sang-Wook Kim

Advanced Materials Technologies, 2201864 (2023), DOI: 10.1002/admt.202201864

Effect of Cyano Substitution on Non-Fullerene Acceptor for Near-Infrared Organic Photodetectors above 1000 nm

Jong-Woon Ha, Hyeong Ju Eun, Byoungwook Park, Hyungju Ahn, Dong Ryeol Hwang, Yeong Seok Shim, Junseok Heo, Changjin Lee, Sung Cheol Yoon, Jong H Kim, Seo-Jin Ko

Advanced Functional Materials 33(8), 2370042 (2023), DOI: 10.1002/adfm.202370042

Ultrahigh photoresponse in strain-and domain-engineered large-scale MoS 2 monolayer films

Ye Seul Jung, Jae Woo Park, Ji Yeon Kim, Youngseo Park, Dong Gue Roe, Junseok Heo, Jeong Ho Cho, Yong Soo Cho*

Journal of Materials Chemistry A (2023), DOI: 10.1039/D3TA00642E

Achieving Highly Sensitive Near-Infrared Organic Photodetectors using Asymmetric Non-Fullerene Acceptor

Un-Hak Lee, Byoungwook Park, Seunghyun Rhee, Jong-Woon Ha, Dong Ryeol Whang, Hyeong Ju Eun, Jong H Kim, Yeongseok Shim, Junseok Heo, Changjin Lee, Bumjoon J Kim, Sung Cheol Yoon, Jaewon Lee, Seo-Jin Ko

Advanced Optical Materials/Early View/2300312 (2023), DOI:10.1002/adom.202300312

Large-area metal surface plasmon polymer coupled nanocomposite thin film at air liquid interface for low voltage operated high-performance photodetector

Manish Kumar Singh, Richa Mishra, Rajiv Prakash, Junsin Yi, Junseok Heo,* Rajiv Kumar Pandey*

Progress in Organic Coatings 174, 107231 (2023), DOI: 10.1016/j.porgcoat.2022.107231

In-sensor image memorization and encoding via optical neurons for bio-stimulus domain reduction toward visual cognitive processing

Doeon Lee, Minseong Park, Yongmin Baek, Byungjoon Bae, Junseok Heo,* and Kyusang Lee*

Nature Communications 13, 5223 (2022), DOI: 10.1038/s41467-022-32790-3

Reconfigurable Radio-Frequency High-Electron Mobility Transistors via Ferroelectric-Based Gallium Nitride Heterostructure

Jeong Yong Yang, Min Jae Yeom, Jaeyong Lee, Kyusang Lee, Changkun Park,* Junseok Heo,* and Geonwook Yoo*

Advanced Electronic Materials 8, 2101406 (2022), DOI: 10.1002/aelm.202101406

Strain-durable dark current in near-infrared organic photodetectors for skin-conformal photoplethysmographic sensors

Hyeong Ju Eun, Hanbee Lee, Yeongseok Shim, Gyeong Uk Seo, Ah Young Lee, Jong Jin Park, Junseok Heo, Sungjun Park,* and Jong H. Kim*

iScience 25, 104194 (2022), DOI:10.1016/j.isci.2022.104194

Origin of the anisotropic-strain-driven photoresponse enhancement in inorganic halide-based self-powered flexible photodetectors

Da Bin Kim, Ju Han, Ye Seul Jung, Kwan Sik Park, Youngseo Park, Junseok Heo and Yong Soo Cho*

Materials Horizons 9, 1207 (2022), DOI: 10.1039/D1MH02055B

Mid-infrared photon sensing using InGaN/GaN nanodisks via intersubband absorption

Zhang Xing, Afroja Akter, Hyun S Kum, Yongmin Baek, Yong-Ho Ra, Geonwook Yoo, Kyusang Lee, Zetian Mi, Junseok Heo*

Scientific reports 12, 4301 (2022), DOI: 10.1038/s41598-022-08323-9?

Albedo-Enabled Enhanced Energy Harvesting via GaAs Bifacial Thin-Film Solar Cells

Zhang Xing, Seonghyun Nam, Dahee Kim, Yongmin Baek, Dohyun Kim, Youngseo Park, Hsin-Ying Lee, Ching-Ting Lee, Kyusang Lee*, Junseok Heo*

Advanced Photonics Research, 2100297 (2022), DOI: 10.1002/adpr.202100297

Visible and Infrared Dual-band Imaging via Ge/MoS2 van der Waals Heterostructure

Aujin Hwang, Minseong Park, Youngseo Park, Yeongseok Shim, Sukhyeong Youn, Chan-Ho Lee, Han Beom Jeong, Hu Young Jeong, Jiwon Chang, Kyusang Lee,* Geonwook Yoo,* and Junseok Heo*

Science Advances 7, eabj2521 (2021), DOI: 10.1126/sciadv.abj2521

Low Subthreshold Slope AlGaN/GaN MOS-HEMT with Spike-Annealed HfO2 Gate Dielectric

Min Jaeo Yeom, Jeong Yong Yang, Chan Ho Lee, Junseok Heo, Roy Byung Kyu Chung,* and Geonwook Yoo*

Micromachines 12, 1441 (2021), DOI: 10.3390/mi12121441

Design of p-WSe2/n-Ge Heterojunction for High-Speed Broadband Photodetectors

Chan Ho Lee, Youngseo Park, Sukhyeong Youn, Min Jae Yeom, Hyun S. Kum, Jiwon Chang, Junseok Heo,* and Geonwook Yoo*

Advanced Functional Materials, 2107992 (2021), DOI: 10.1002/adfm.202107992

Ferroelectric α-In2Se3 Wrapped-Gate β-Ga2O3 Field-Effect Transistors for Dynamic Threshold Voltage Control

Jeong Yong Yang, Min Jae Yeom, Youngseo Park, Junseok Heo,* and Geonwook Yoo*

Advanced Electronic Materials 7, 2100306 (2021), DOI: 10.1002/aelm.202100306

Effective Dark Current Suppression for High-Detectivity Organic Near-Infrared Photodetectors Using a Non-Fullerene Acceptor

Hyeong Ju Eun, Hyojin Kye, Dahee Kim, In Su Jin, Jae Woong Jung, Seo-Jin Ko, Junseok Heo,* Bong-Gi Kim,* and Jong H. Kim*

ACS Applied Materials & Interfaces 13, 11144(2021), DOI: 10.1021/acsami.0c22808

Interface Trap-Induced Temperature Dependent Hysteresis and Mobility in β-Ga2O3 Field-Effect Transistors

Youngseo Park, Jiyeon Ma, Geonwook Yoo,* and Junseok Heo*

Nanomaterials 11, 494 (2021), DOI: 10.3390/nano11020494

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

AlXGa1-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 MoOx 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

Hybrid metal-halide perovskite-MoS2 Phototransistor

Youngseo Park, Sanghyun Lee, Hui Joon Park, Hyoung Won Baac, Geonwook Yoo, Junseok Heo*

Journal of Nanoscience and Nanotechnology 16, 11722 (2016), DOI: 10.1166/jnn.2016.13581

High-frequency optoacoustic transmitter based on nanostructured germanium via metal-assisted chemical etching

Geonwook Yoo, Youngseo Park, Pilgyu Sang, Hyoung Won Baac, and Junseok Heo*

Opticals Materials Express 6, 2567 (2016), DOI: 10.1364/OME.6.002567

Highly efficient single-junction GaAs thin-film solar cell on flexible substrate

Sunghyun Moon, Kangho Kim, Youngjo Kim, Junseok Heo,* and Jaejin Lee*

Scientific Reports 6, 30107 (2016), DOI: 10.1038/srep30107

Thermally activated trap charges responsible for hysteresis in multilayer MoS2 field-effect transistors

Youngseo Park, Hyoung Won Baac, Junseok Heo,* and Geonwook Yoo*

Applied Physics Letters 108, 083102 (2016), DOI: 10.1063/1.4942406

Angle- and position-insensitive electrically tunable absorption in graphene by epsilon-near-zero effect

Sangjun Lee, Thang Q. Tran, Myunghwan Kim, Hyungjun Heo, Junseok Heo, and Sangin Kim

Optics Express 23, 33350 (2015), DOI: 10.1364/OE.23.033350

All-Optical Ultrasound Transducer Using CNT-PDMS and Etalon Thin-Film Structure

Geonwook Yoo, Hyunmin Yoon, Jeongmin Heo, Ujwal Kumar Thakur, Hui Joon Park, Hyoung Won Baac, and Junseok Heo*

IEEE Photonics Journal 7, 6803708 (2015), DOI: 10.1109/JPHOT.2015.2496862

InGaN/GaN nanowires grown on SiO2 and light emitting diodes with low turn on voltages

Youngseo Park, Shafat Jahangir, Yongjun Park, Pallab Bhattacharya, and Junseok Heo*

Optics Express 23, A650 (2015), DOI: 10.1364/OE.23.00A650

Characteristics of AlN/GaN nanowire Bragg mirror grown on (001) silicon by molecular beam epitaxy

Junseok Heo, Zifan Zhou, Wei Guo, Boon S. Ooi, and Pallab Bhattacharya

Applied Physics Letters 103, 181102 (2013), DOI: 10.1063/1.4827338

Room temperature polariton lasing from GaN nanowire array clad by dielectric microcavity

Junseok Heo, Shafat Jahangir, Bo Xiao, and Pallab Bhattacharya

Nano Letters 13, 2376 (2013), DOI: 10.1021/nl400060j

Solid state electrically injected exciton-polariton laser

Pallab Bhattacharya, Bo Xiao, Ayan Das, Sishir Bhowmick, and Junseok Heo

Physical Review Letters 110, 206403 (2013), DOI: 10.1103/PhysRevLett.110.206403

Electrically driven polarized single-photon emission from an InGaN quantum dot in a GaN nanowire

Saniya Deshpande, Junseok Heo, Ayan Das, and Pallab Bhattacharya

Nature Communications 4, 1675 (2013), DOI: 10.1038/ncomms2691

Polariton Bose-Einstein condensate at room temperature in a Al(Ga)N nanowire-dielectric microcavity with a spatial potential trap

Ayan Das, Pallab Bhattacharya, Junseok Heo, Animesh Banerjee, and Wei Guo

Proceedings of the National Academy of Sciences of the United States of America 110, 2735 (2013), DOI: 10.1073/pnas.1210842110

A quantum dot rolled-up microtube directional coupler

Sishir Bhowmick, Junseok Heo, and Pallab Bhattacharya

Applied Physics Letters 101, 171111(2012), DOI: 10.1063/1.4764530

Room temperature strong coupling effects from single ZnO nanowire microcavity

Ayan Das, Junseok Heo, Adrian Bayraktaroglu, Wei Guo, Tien-Khee Ng, Jamie Phillips, Boon S. Ooi, and Pallab Bhattacharya

Optics Express 20, 11830 (2012), DOI: 10.1364/OE.20.011830

Room temperature single GaN nanowire spin valves with FeCo/MgO tunnel contacts

Hyun Kum, Junseok Heo, Shafat Jahangir, Animesh Banerjee, Wei Guo, and Pallab Bhattacharya

Applied Physics Letters 100, 182407 (2012), DOI: 10.1063/1.4711850

Threshold Characteristics of Quantum Dot Rolled-up Microtube Lasers

Junseok Heo, Sishir Bhowmick, and Pallab Bhattacharya

IEEE Journal of Quantum Electronics 48, 927 (2012), DOI: 10.1109/JQE.2012.2197177

Coherent and directional emission at 1.55 μm from PbSe colloidal quantum dot electroluminescent device on silicon

Junseok Heo, Zhenyu Jiang, Jian Xu, and Pallab Bhattacharya

Optics Express 19, 26394 (2011), DOI: 10.1364/OE.19.026394

Spin relaxation in InGaN quantum disks in GaN nanowire

Animesh Banerjee, Fatih Dogan, Junseok Heo, Aurelien Manchon, Wei Guo, and Pallab Bhattacharya

Nano Letters 11, 5396 (2011), DOI: 10.1021/nl203091f

Room Temperature Ultralow Threshold GaN Nanowire Polariton Laser

Ayan Das, Junseok Heo, Marc Jankowski, Wei Guo, Lei Zhang, Hui Deng, and Pallab Bhattacharya

Physical Review Letters 107, 066405 (2011), DOI: 10.1103/PhysRevLett.107.066405

Monolithic single GaN nanowire laser with photonic crystal microcavity on silicon

Junseok Heo, Wei Guo, and Pallab Bhattacharya

Applied Physics Letters 98, 021110 (2011), DOI: 10.1063/1.3540688

Auger Recombination in III-Nitride Nanowires and Its Effect on Nanowire Light Emitting Diode Characteristics

Wei Guo, Meng Zhang, Pallab Bhattacharya, and Junseok Heo

Nano Letters 11, 1434 (2011), DOI: 10.1021/nl103649d

An Electrically Injected Quantum Dot Spin Polarized Single Photon Source

Pallab Bhattacharya, Ayan Das, Debashish Basu, Wei Guo, and Junseok Heo

Applied Physics Letters 96, 101105 (2010), DOI: 10.1063/1.3357426

Electroluminescence from Silicon-Based Photonic Crystal Microcavities with PbSe Quantum Dots

Junseok Heo, Ting Zhu, Chunfeng Zhang, Jian Xu, and Pallab Bhattacharya

Optics Letters 35, 547 (2010), DOI: 10.1364/OL.35.000547

Enhanced photoluminescence from embedded PbSe colloidal quantum dots in silicon-based random photonic crystal microcavities

Jun Yang, Junseok Heo, Ting Zhu, Jian Xu, Juraj Topolancik, Frank Vollmer, Rob Ilic, and Pallab Bhattacharya

Applied Physics Letters 92, 261110 (2008), DOI: 10.1063/1.2954007

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