Bibliographic Details
| Title: |
Surface Microstructure Enhanced Cryogenic Infrared Light Emitting Diodes for Semiconductor Broadband Upconversion |
| Authors: |
Peng Bai, Hanbin Wang, Rongrong Lv, Yi Wang, Yinqiao Li, Shangjie Han, Jiaxuan Cai, Ning Yang, Weidong Chu, Yan Xie, Meng Chen, Yingxin Wang, Ziran Zhao |
| Source: |
Nanomaterials, Vol 14, Iss 24, p 2039 (2024) |
| Publisher Information: |
MDPI AG, 2024. |
| Publication Year: |
2024 |
| Collection: |
LCC:Chemistry |
| Subject Terms: |
cryogenic LEDs, electroluminescence efficiency, broadband upconversion, surface microstructure, Chemistry, QD1-999 |
| More Details: |
Broadband upconversion has various applications in solar photovoltaic, infrared and terahertz detection imaging, and biomedicine. The low efficiency of the light-emitting diodes (LEDs) limits the broadband upconversion performance. In this paper, we propose to use surface microstructures to enhance the electroluminescence efficiency (ELE) of LEDs. Systematical investigations on the cryogenic-temperature performances of microstructure-coupled LEDs, including electroluminescence efficiency, luminescence spectrum, and recombination rate, have been carried out by elaborating their enhancement mechanism and light emitting characteristics both experimentally and theoretically. We have revealed that the reason for the nearly 35% ELE enhancement of the optimized structure under cryogenic temperature and weak injection current is the efficient carrier injection efficiency and the high recombination rate in the active region. We also compare studies of the surface luminescence uniformity of the optimized LED with that of the unoptimized device. This work gives a precise description, and explanation of the performance of the optimized microstructure coupled LED at low temperatures, providing important guidance and inspiration for the optimization of broadband upconverter in the cryogenic temperature region. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2079-4991 |
| Relation: |
https://www.mdpi.com/2079-4991/14/24/2039; https://doaj.org/toc/2079-4991 |
| DOI: |
10.3390/nano14242039 |
| Access URL: |
https://doaj.org/article/9425ed63f14144e4b481f42d685ecf26 |
| Accession Number: |
edsdoj.9425ed63f14144e4b481f42d685ecf26 |
| Database: |
Directory of Open Access Journals |
