Efficiency improvement of GaN-based micro-light-emitting diodes embedded with Ag NPs into a periodic arrangement of nano-hole channel structure by ultra close range localized surface plasmon coupling

Zaifa Du; Enguo Chen; Hongjuan Feng; Fengsong Qian; Fangzhu Xiong; Penghao Tang; Weiling Guo; Jibin Song; Qun Yan; Tailiang Guo; Jie Sun

doi:10.1088/1361-6528/ac8f98

Efficiency improvement of GaN-based micro-light-emitting diodes embedded with Ag NPs into a periodic arrangement of nano-hole channel structure by ultra close range localized surface plasmon coupling

Nanotechnology. 2022 Sep 21;33(49). doi: 10.1088/1361-6528/ac8f98.

Authors

Affiliations

¹ Key Laboratory of Optoelectronics Technology, College of Microelectronics, Beijing University of Technology, Beijing 100124, People's Republic of China.
² Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350100, China, and National and Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350100, People's Republic of China.
³ MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou 350100, People's Republic of China.

PMID: 36067721
DOI: 10.1088/1361-6528/ac8f98

Abstract

NH-μLED, namely a micro light-emitting diode structure with nano-holes dug all the way through the active region, is designed to make silver nanoparticles in extremely close contact with the quantum wells for improving the coupling between the localized surface plasmon and the quantum wells (LSP-QWs coupling) and thus enhancing the optical properties of theμLED. The experimental results show that, thanks to this deep nanohole structure, the LSP-QWs coupling can be realized effectively, which ultimately increases the optical performance of theμLED. The internal quantum efficiency of the NH-μLED filled with silver nanoparticles is increased by 12%, and the final optical output power is also enhanced. We have further carried out a comparison study which measures the transient lifetime of two different types ofμLEDs, and the results provide convincing evidence for the existence of the ultra close range LSP-QWs coupling effect.

Keywords: Micro-LED; internal quantum; localized surface plasmon.