Systematic study on size and temporal dependence of micro-LED arrays for display applications
Journal article, 2023
Micro-LEDs are one of the most promising candidates for next-generation displays, yet they are inconvenienced by the efficiency reduction induced by the sidewall defects when pursuing further scaled-down device dimensions. We have systematically investigated both the size and temporal dependence of micro-LEDs. Micro-LED arrays with a mesa size ranging from 7 to 100 μm were prepared for display purposes. The luminance and external quantum efficiency (EQE) were measured and discussed. Surprisingly, micro-LED arrays with a smaller mesa size exhibit a higher EQE under 100 ns pulse duration operation when compared with longer pulse duration operations. Under certain short-pulsed excitation, a 7 × 7 μm2 micro-LED array even exhibits a >20% higher EQE as compared to the direct current (DC) or the long duration pulse operation condition.We thus concluded that the notorious efficiency reduction induced by sidewall defects in small-sized micro-LED arrays could be significantly reduced by applying short-pulse voltages.
Author
Junyang Nie
Fuzhou University
Xi'an Jiaotong University
Zhi Zhang
Fuzhou University
Kongjie Chen
Fuzhou University
Yifeng Liu
Fuzhou University
Shuang He
Fuzhou University
Zhonghang Huang
Fuzhou University
Xiaoning Zhang
Xi'an Jiaotong University
Jie Sun
Fuzhou University
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Fan Zhang
Fujian Prima Optoelectronics Company Ltd.
Yongsheng Wu
Fujian Prima Optoelectronics Company Ltd.
Qun Yan
Fuzhou University
Rich Sense Electronics Technology Inc.
Xi'an Jiaotong University
Photonics Research
2327-9125 (ISSN)
Vol. 11 4 549-557Subject Categories
Atom and Molecular Physics and Optics
Other Physics Topics
Condensed Matter Physics
DOI
10.1364/PRJ.479593