Efficiency enhancement of micro-light-emitting diode with shrinking size by localized surface plasmons coupling
Journal article, 2024
The external quantum efficiency (EQE) enhancement of different sized GaN micro-light-emitting diodes (μLEDs) by using localized surface plasmons (LSPs) have been studied. Silver nanoparticles (Ag NPs) are attached to the sidewalls of μLEDs by spin-coating so as to be effectively coupled with the multiple quantum well (MQW) of μLEDs and generate the LSPs. In the μLEDs with 20 × 20 μm2 large mesas, the LSPs can effectively inhibit the efficiency droop. Compared to the μLED samples without the LSPs coupling, the EQE has been enhanced by about 8% at a high current density of 20,000 A/cm2. This work confirms the effectiveness of the LSPs technology in improving the μLED performances, which is originally practiced only on the basal faces of conventional LEDs.
Author
Zaifa Du
Weifang University
Jie Sun
Fuzhou University
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Hongjuan Feng
Fuzhou University
Peng Hao Tang
Beijing University of Technology
Weiling Guo
Beijing University of Technology
Kai Han
Weifang University
Enguo Chen
Fuzhou University
Tailiang Guo
Fuzhou University
Jibin Song
Fuzhou University
Qun Yan
Fuzhou University
Applied Physics B: Lasers and Optics
0946-2171 (ISSN)
Vol. 130 3 36Subject Categories
Atom and Molecular Physics and Optics
Condensed Matter Physics
DOI
10.1007/s00340-024-08174-4