Dong Ko
Professor, Electrical & Computer Engineering
- dong.k.ko@njit.edu
- 973-596-3515
- 215 Electrical and Computer Engineering Center (ECEC)
About Me
Dong-Kyun Ko is a Professor of Electrical and Computer Engineering at the New Jersey Institute of Technology (NJIT). He received his B.S. degree from Yonsei University, Korea, in 2005, followed by M.S. and Ph.D. degrees from the University of Pennsylvania in 2007 and 2011, respectively. Following his doctoral studies, he joined the Massachusetts Institute of Technology (MIT) as a Postdoctoral Associate, where he held a joint appointment in Chemistry and Electrical Engineering.
Professor Ko’s research focuses on colloidal quantum dot-based devices, in which semiconductor nanocrystals with tailored electronic properties serve as fundamental building blocks for the bottom-up development of electronic and optoelectronic devices. This approach enables the exploitation of unique properties that emerge at the nanoscale and provides opportunities to develop unconventional device concepts and architectures.
Professor Ko’s research focuses on colloidal quantum dot-based devices, in which semiconductor nanocrystals with tailored electronic properties serve as fundamental building blocks for the bottom-up development of electronic and optoelectronic devices. This approach enables the exploitation of unique properties that emerge at the nanoscale and provides opportunities to develop unconventional device concepts and architectures.
Education
Postdoc; Massachusetts Institute of Technology; Electrical Engineering And Chemistry; 2014
Ph.D.; University of Pennsylvania; Materials Science And Engineering; 2011
M.S.; University of Pennsylvania; Materials Science And Engineering; 2007
B.S.; Yonsei University; Materials Science And Engineering; 2005
Website
2026 Fall Courses
ECE 725 - INDEPENDENT STUDY I
ECE 657 - SEMICONDUCTOR DEVICES
ECE 701B - MASTER'S THESIS
ECE 790A - DOCTRL DISSRTN & RESEARCH
Teaching Interests
-Solid-state electronic devices
-Semiconductor device physics
-Nanoscale energy transport and conversion
-Energy harvesting, conversion, and storage
-Semiconductor device physics
-Nanoscale energy transport and conversion
-Energy harvesting, conversion, and storage
Past Courses
ECE 361: ELECTROMAG FIELDS I
ECE 416: ELECT & COMP ENGNR PROJ II - HONORS
ECE 416: ELECTRICAL AND COMPUTER ENGINEERING PROJECT II
ECE 494: ELECTRICAL ENGINEERING LABORATORY III
ECE 618: PHOTOVOLTAIC SEMICONDUCTORS AND RENEWABLE ENERGY
ECE 618: RENEWABLE ENERGY SYSTEMS
ECE 657: SEMICONDUCTOR DEVICES
ECE 657: SEMICONDUCTOR DEVICES
Research Interests
- Synthesis and Characterization of Colloidal Quantum Dots
- Infrared Photodetectors
- Solar Cells
- Thermoelectric Energy Harvesting
- Infrared Photodetectors
- Solar Cells
- Thermoelectric Energy Harvesting
Journal Article
Yuxuan Zhang, Dong Hun Lee, Honghwi Park, Sung-Jin Chang, Jinwook Baek, Byung-Hyuk Jun, Jeongmin Park, Dohyeon Kim, Han Wook Song, Han Wook Song, , Dong Kyun Ko, Hongsik Park, Chung Soo Kim, Sunghwan Lee, . 2025. "Material-Specific Diffusion Barrier Performance of Al2O3 for p-Type and n-Type Oxide Semiconductors in Oxide- Based CMOS Applications." ACS Applied Materials & Interfaces, vol. 17, no. 28, pp. 40810– 40825.
Rakina Islam, X. Wu, D. J. Lockwood, Dong Kyun Ko, Leonid Tsybeskov. 2025. "Photoluminescence dynamics and ligand exchange in PbS/CdS core/shell nanocrystal films." Journal of Applied Physics, vol. 137, pp. 014302.
Mohammad M. Al Mahfuz, Rakina Islam, Dong Kyun Ko. 2024. "Artificial Amacrine Retinal Circuits." ACS Applied Materials & Interfaces, vol. 16, no. 35, pp. 46454–46460.
Mid-wavelength infrared photoconductive film synthesized from PbSe molecular ink Al Mahfuz, Rakina Islam, Yuxuan Zhang, Jinwook Baek, Junsung Park, Sunghwan Lee, Dong Kyun Ko. 2023. "Mid-wavelength infrared photoconductive film synthesized from PbSe molecular ink." Applied Physics Letters, vol. 123, pp. 203301.
Changhyeon Yoo, Vivek Adepu, Sang Sub Han, Jung Han Kim, June-Chul Shin, Seoul National University Cao, Junsung Park, Mohammad M. Al Mahfuz, Laurene Tetard, Gwan-Hyoung Lee, Dong Kyun Ko, Parikshit Sahatiya, Yeonwoong Jung. 2023. "Low-Temperature Centimeter-Scale Growth of Layered 2D SnS for Piezoelectric Kirigami Devices." ACS Nano, vol. 17, no. 20, pp. 20680-20688.
Mohammad M. Al Mahfuz, Junsung Park, Rakina Islam, Dong Kyun Ko. 2023. "Colloidal Ag2Se intraband quantum dots." Chemical Communications, vol. 59, pp. 10722-10736 .
Mohammad M. Al Mahfuz, Junsung Park, Rock Huebner, Sunghwan Lee, Dong Kyun Ko. 2023. "Schottky Photodiodes Based on Mid-Wavelength Infrared Intraband Colloidal Quantum Dots - Surface Ligand and Metal Contact Studies." Journal of Materials Chemistry C, vol. 11, pp. 7714-7721.
Junsung Park, Mohammad M. Al Mahfuz, Rock Huebner, Dong Kyun Ko. 2023. "Uncooled Mid-Wavelength Infrared Photoconductive Detectors Based on PbSe Nanocrystals." ACS Applied Electronic Materials , vol. 5, no. 4, pp. 2386–2393.
Junsung Park, Mohammad M. Al Mahfuz, Rock Huebner, Dong Kyun Ko. 2022. "Mid-Infrared Photoconductive Detectors Fabricated From Solution-Processed PbSe Nanocrystals." ECSarXiv.
Sang Sub Han, Tae-Jun Ko, Mashiyat Sumaiya, Alex Ka Shum, Tae-Sung Bae, Hee-Suk Chung, Jinwoo Ma, Shahid Sattar, Shihab Bin Hafiz, Mohammad M. Al Mahfuz, Sohrab Alex Mofid, J. Andreas Larsson, Kyu Hwan Oh, Dong Kyun Ko, Yeonwoong Jung. 2022. "Peel-and-Stick Integration of Atomically Thin Nonlayered PtS Semiconductors for Multidimensionally Stretchable Electronic Devices." ACS Applied Materials & Interfaces, vol. 14, pp. 20268–20279.
Dong Hun Lee, Honghwi Park, Michael Clevenger, Hyeonghun Kim, Chung Soo Kim, Mingyuan Liu, Giyong Kim, Han Wook Song, Kwangsoo No, Sung Yeol Kim, Dong Kyun Ko, Anne Lucietto, Hongsik Park, Sunghwan Lee. 2021. "High-Performance Oxide-Based p-n Heterojunctions Integrating p-SnOx and n-InGaZnO." ACS Applied Materials & Interfaces, vol. 13, pp. 49043-49049.
Shihab Bin Hafiz, Mohammad M. Al Mahfuz, Sungwhan Lee, Dong Kyun Ko. 2021. "Midwavelength Infrared p-n Heterojunction Diodes Based on Intraband Colloidal Quantum Dots." ACS Applied Materials & Interfaces, vol. 13, pp. 49043-49049.
Shihab Bin Hafiz, Mohammad M. Al Mahfuz, Dong Kyun Ko. 2021. "Intraband Quantum Dot Barrier Devices - Optimization of Energy Level Alignment." ECS Transactions, vol. 102, pp. 45.
Mingyuan Liu, Xingyu Wang, HanWook Song, Hyeonghun Kim, Michael Clevenger, Dong Kyun Ko, Kwangsoo No, Sunghwan Lee. 2021. "Origin of an unintended increase in carrier density of ternary cation-based amorphous oxide semiconductors." Applied Surface Science, vol. 556, pp. 149676.
Mashiyat Sumaiya Shawkat,, Shihab Bin Hafiz, Molla Manjurul Islam , Sohrab Alex Mofid, Mohammad M. Al Mahfuz, Aritra Biswas, Hee-Suk Chung, Emmanuel Okogbue, Tae-Jun Ko, Debashis Chanda, Tania Roy, Dong Kyun Ko, Yeonwoong Jung. 2021. "Scalable Van der Waals Two-Dimensional PtTe2 Layers Integrated onto Silicon for Efficient Near-to-Mid Infrared Photodetection." ACS Applied Materials & Interfaces, vol. 13, pp. 15542–15550.
Shihab Bin Hafiz, Mohammad M. Al Mahfuz, Dong Kyun Ko. 2020. "Vertically-Stacked Intraband Quantum Dot Devices For Mid-Wavelength Infrared Photodetection." ACS Applied Materials & Interfaces, vol. 13, pp. 937–943.
Leonid Tsybeskov, M. Alam, Shihab Bin Hafiz, Dong Kyun Ko, A. M. Bratkovsky, X. Wu, D. J. Lockwood, . 2020. "Photoluminescence in PbS Nanocrystal Thin Films: Nanocrystal Density, Film Morphology and Energy Transfer." Journal of Applied Physics, vol. 128, pp. 134301.
Austin Reed, Chandon Stone, Kwangdong Roh, Han Wook Song, Xingyu Wang, Mingyuan Liu, Dong Kyun Ko, Kwangsoo No, Sunghwan Lee. 2020. "The Role of Third Cation Doping on Phase Stability, Carrier Transport and Carrier Suppression in Amorphous Oxide Semiconductors." Journal of Materials Chemistry C, vol. 8, pp. 13798-13810 .
Tae-Jun Ko, Sang Sub Han, Emmanuel Okogbue, Mashiyat Sumariya Shawkat, Mengjing Wang, Jinwoo Ma, Tae-Sung Bae, Shihab Bin Hafiz, Dong Kyun Ko, Hee-suk Chung, Kyu Hwan Oh, Yeonwoong Jung, . 2020. "Wafer-Scale 2D PtTe2 Layers-Enabled Kirigami Heaters with Superior Mechanical Stretchability and Electro-Thermal Responsiveness." Applied Materials Today, vol. 20, pp. 100718.
Shihab Bin Hafiz, Mohammad M. Al Mahfuz, Michael R Scimeca, Sungwhan Lee, Soong Ju Oh, Ayaskanta Sahu, Dong Kyun Ko. 2020. "Ligand engineering of mid-infrared Ag2Se colloidal quantum dots." Physica E: Low-dimensional Systems and Nanostructures, vol. 124, pp. 114223.
Shihab Bin Hafiz, Mohammad Mostafa Al Mahfuz, Dong Kyun Ko. 2020. "Mid-Wavelength Infrared Responsivity of Colloidal Quantum Dot/Organic Hybrid Photodetectors." ECS Transactions, vol. 97, no. 1, pp. 109-115.
Md Ashraf Hossain, Sanghyun Jeon, Junhyuk Ahn, Junsung Bang, Ho Kun Woo, Shihab Hafiz, Dong Kyun Ko, Soong Ju Oh. 2020. "Property Engineering Through Nanomaterial Chemical Transformation of Colloidal Nanocrystal Thin Films." Applied Surface Science, vol. 513, pp. 145721.
Nan Chen, Michael Scimeca, Shlok Paul, Shihab Hafiz, Dong Kyun Ko, Ayaskanta Sahu. 2019. "High-Performance Thermoelectric Silver Selenide Thin Films Cation Exchanged from a Copper Selenide Template." Nanoscale Advances , vol. 2, pp. 368–376.
Shihab Hafiz, Michael Scimeca, Ayaskanta Sahu, Dong Kyun Ko. 2019. "Mid-Infrared Colloidal Quantum Dot Based Nanoelectronics and Nano-Optoelectronics." ECS Transactions, vol. 92, no. 1, pp. 11-16.
Ho Kun Woo, Min Su Kang, Taesung Park, Junsung Bang, Sanghyun Jeon, Woo Seok Kee, Junhyuk Ahn, Geonhee Cho, Dong Kyun Ko, Younghoon Kim, Don-Hyung Ha, Soong Ju Oh. 2019. "Colloidal-Annealing of ZnO Nanoparticles to Passivate Traps and Improve Charge Extraction in Colloidal Quantum Dot Solar Cells." Nanoscale, vol. 11, pp. 17498-17505.
Shihab Hafiz, Michael Scimeca, Ayaskanta Sahu, Dong Kyun Ko. 2019. "Colloidal Quantum Dots for Thermal Infrared Sensing and Imaging." Nano Convergence, vol. 6, no. 7, pp. 1-22.
Shihab Hafiz, Michael Scimeca, Peter Zhao, Ingrid Paredes, Ayaskanta Sahu, Dong Kyun Ko. 2019. "Silver Selenide Colloidal Quantum Dots for Mid-Wavelength Infrared Photodetection." ACS Applied Nano Materials, vol. 2, no. 3, pp. 1631-1636.
Chengjun Sun, Amirhussein Goharpey, Ayush Rai, Teng Zhang, Dong Kyun Ko. 2016. "Paper-based Thermoelectric Nanocomposites and Flexible Power Generation Modules." Materials Research Society.
Chengjun Sun, Amirhossein Goharpy, Ayush Rai, Teng Zhang, Dong Kyun Ko. 2016. "Paper Thermoelectrics: Merging Nanotechnology with Naturally Abundant Fibrous Material." ACS Applied Materials and Interfaces, vol. 8, no. 34, pp. 22182–22189.
Kook-Han Kim, Dong Kyun Ko, Yong-Tae Kim, Nam Hyeong Kim, Jayadeep Paul, Christopher B Murray, Rudresh Acharya, Yong Ho Kim, William F Degradao, Gevorg Grigoryan. 2016. "Protein-Directed Self-Assembly of a Fullerene Crystal." Nature Communications, vol. 7, pp. 11429.
Dong Kyun Ko, Andrea Maurano, Su Kyung Suh, Donghun Kim, Gyuweon Hwang, Jeffery Grossman, Vladimir Bulovic, Moungi Bawendi. 2016. "Photovoltaic performance of PbS quantum dots treated with metal salts." ACS Nano, vol. 10, no. 3, pp. 3382-3388.
Conference Paper
"Intraband Colloidal Quantum Dots for Low-Cost Mid-Wavelength Infrared Detectors"
2022 IEEE Research and Applications of Photonics in Defense Conference (RAPID), September, 2022.
2022 IEEE Research and Applications of Photonics in Defense Conference (RAPID), September, 2022.
Book
Durgamadhab Misra, Z. Chen, Dong Kyun Ko, Y. Obeng, D. Bauza, T. Chikyow. "Dielectrics for Nanosystems 8: Materials Science, Processing, Reliability, and Manufacturing." 353 pages pp. ECS Transactions, The Electrochemical Society, 2020. ISBN ISBN 978-1-60768-889-1.
Conference Proceeding
"Colloidal Quantum Dot-Based Mid-Wavelength Infrared Photodetectors"
Proceedings of 2019 US-Korea Conference on Science, Technology, and Entrepreneurship, August, 2019.
Proceedings of 2019 US-Korea Conference on Science, Technology, and Entrepreneurship, August, 2019.
"Nanocomposites of Colloidal Nanocrystals and Cellulose For Paper-Based Thermoelectric Energy Harvesting Modules"
Proceedings of 2018 US-Korea Conference on Science, Technology, and Entrepreneurship, August, 2018.
Proceedings of 2018 US-Korea Conference on Science, Technology, and Entrepreneurship, August, 2018.
"Photoconductive Photodetectors Based on Thermal Infrared Colloidal Quantum Dots"
Proceedings of 2018 US-Korea Conference on Science, Technology, and Entrepreneurship, August, 2018.
Proceedings of 2018 US-Korea Conference on Science, Technology, and Entrepreneurship, August, 2018.
Conference Abstract
"Silver Selenide Colloidal Quantum Dots for Low-cost Mid- Wavelength Infrared Optoelectronics"
19th IEEE International Conference on Nanotechnology, July (3rd Quarter/Summer), 2019.
19th IEEE International Conference on Nanotechnology, July (3rd Quarter/Summer), 2019.
"Mid-Infrared Silver Chalcogenide Colloidal Quantum Dots and Devices"
Materials Research Society, April (2nd Quarter/Spring), 2019.
Materials Research Society, April (2nd Quarter/Spring), 2019.
"Silver Chalcogenide Colloidal Quantum Dots for Room Temperature Photodetection in the Mid-Wavelength Infrared"
Materials Research Society, April (2nd Quarter/Spring), 2019.
Materials Research Society, April (2nd Quarter/Spring), 2019.