Publications
Control of Lasaing Modes from Halide Perovskite Thin Films
Gayoung Lee, Barry P. Rand, and Kwangdong Roh
(In preparation)
Electrically-assisted lasing in metal halide perovskite semiconductors
Alex Grede, Robert Cawthorn, Lianfeng Zhao, John Murphy, Kwnagdong Roh, Khaled Al Kurdi, Stephen Barlow, Seth Marder, Barry P. Rand and Noel C. Giebink
Progress on metal halide perovskite light emitters: from LEDs to lasers
Gayoung Lee, Yejin Jun, Hyeonji Lee and Kwnagdong Roh
Advanced Photonics Research (Under Revision)
Pixelated vertical-cavity surface-emitting laser arrays from colloidal quantum dot films
Kwnagdong Roh
Toward non-epitaxial laser diodes
William B. Gunnarsson, Kwnagdong Roh, Lianfeng Zhao, John P. Murphy, Alex J. Grede, Noel C. Giebink, and Barry P. Rand
Hot-casting assisted liquid additive engineering for efficient and stable perovskite solar cells
Hanul Min, Junnan Hu, Zhaojian Xu, Tianran Liu, Kwangdong Roh, and Barry P. Rand
Highly transparent, scalable, and stable perovskite solar cells with minimal aesthetic compromise
Tiaran Liu, Xiaoming Zhao, Ping Wang, Quinn C. Burlingame, Junnan Hu, Kwangdong Roh, Barry P. Rand, Minjie Chen, and Yueh-Lin Loo
Hybrid Silicon-Polymer Photodetector Engineered Using Oxidative Chemical Vapor Deposition for High-Performance and Bias-Switchable Multi-Functionality
Hyeonghun Kim, Molly Rothschild, Kwangdong Roh, Yunseok Kim, Ho Seong Jang, Byung-Cheol Min, Sunghwan Lee
Electrochemically n-doped CsPbBr3 nanocrystals thin films
Sungyeon Heo, Kwangdong Roh, Fengyu Zhang, Steven E. Tignor, Andrew B. Bocarsly, Antoine Kahn, and Barry P. Rand
Nanosecond-pulsed perovskite light-emitting diodes at high current density
Lianfeng Zhao*, Kwangdong Roh*, Sara Kacmoli, Khaled Al Kurdi, Xiao Liu, Stephen Barlow, Seth R. Marder, Claire Gmachl, and Barry P. Rand
Advanced Materials 33 (44) 2104867 (*Equally contributed) (2021)
Tuning laser threshold within the large optical gain bandwidth of halide perovskite thin films
Kwangdong Roh, Lianfeng Zhao, and Barry P. Rand
Organic hole transport material ionization potential dictates diffusion kinetics of iodine species in halide perovskite devices
Ross Kerner, Sungyeon Heo, Kwangdong Roh, Kyle MacMillan, Bryon Larson, and Barry P. Rand
The role of third cation doping on phase stability, carrier transport and carrier suppression in amorphous oxide semiconductors
Austin Reed, Chandon Stone, Kwangdong Roh, Han Wook Song, Xingyu Wang, Mingyuan Liu, Dong-Kyun Ko, Kwangsoo No, Sunghwan Lee
Thermal management enables bright and stable perovskite light-emitting diodes
Lianfeng Zhao, Kwangdong Roh, Sara Kacmoli, Stephen Barlow, Seth R. Marder, Claire Gmachl, and Barry P. Rand
Optically pumped lasing from hybrid perovskite light-emitting diodes
Hoyeon Kim*, Kwangdong Roh*, John P. Murphy, Lianfeng Zhao, William B. Gunnarsson, Elena Longhi, Stephen Barlow, Seth R. Marder, Barry P. Rand, and Noel C. Giebink
Advanced Optical Materials 8 (1) 201901297 (*Equally contributed) (2020)
Widely tunable, room temperature, single-mode lasing operation from mixed-halide perovskite thin films
Kwangdong Roh, Lianfeng Zhao, William B. Gunnarsson, Zhengguo Xiao, Yufei Jia, Noel C. Giebink, Barry P. Rand
Work function investigations of Al-doped ZnO for band-alignment in electronic and optoelectronic applications
Grant Drewelow, Austin Reed, Chandon Stone, Kwangdong Roh, Zhong-Tao Jiang, Hongsik Park, Sunghwan Lee
Mixed lead-tin halide perovskites for efficient and wavelength-tunable near infrared light emitting diodes
Weiming Qiu, Zhengguo Xiao, Kwangdong Roh, Nakita K. Noel, Andrew Shapiro and Barry P. Rand
Hybrid perovskite light emitting diodes under intense electrical excitation
Hoyeon Kim, Lianfeng Zhao, Jared Price, Alex Grede, Kwangdong Roh, Alyssa Brigeman, Mike Lopez, Barry P. Rand and Noel Giebink
Improved outcoupling efficiency and stability of perovskite light emitting diodes using thin emitting layers
Lianfeng Zhao, Kyung Min Lee, Kwangdong Roh, Saeed Uz Zaman Khan and Barry P. Rand
Spectroscopy of optical gain in low threshold colloidal quantum dot laser media: dominance of single-exciton states at room temperature
Kwangdong Roh, Joonhee Lee, Cuong Dang and Arto Nurmikko
A photonic crystal laser from solution based organo-lead iodide perovskite thin films
Songtao Chen, Kwangdong Roh, Joonhee Lee, Wee Kiang Chong, Yao Lu, Nripan Mathews, Tze Chien Sum and Arto Nurmikko
Surface-emitting red, green, and blue colloidal quantum dot distributed feedback lasers
Kwangdong Roh, Cuong Dang, Joonhee Lee, Songtao Chen, Jonathan S. Steckel, Seth Coe-Sullivan and Arto Nurmikko
Highly efficient, spatially coherent distributed feedback lasers from dense colloidal quantum dot films
Cuong Dang, Joonhee Lee, Kwangdong Roh, Hanbit Kim, Sungmo Ahn, Heonsu Jeon, Craig Breen, Jonathan S. Steckel, Seth Coe-Sullivan and Arto Nurmikko
Study on elimination of twin image in a combined dual-type digital hologram microscope system
Moonseok Kim, Sukjoon Hong, Kwangdong Roh, Kwangsup Soh, Sanghoon Shin, Jung-Young Son, Kim, Jaisoon