journal article·2021-09-28

Narrow-Band AlGaN-Based UVB Light-Emitting Diodes

Tsung-Yen Liu, Shih-Ming Huang, Mu-Jen Lai, Rui-Sen Liu, Xiong Zhang, Yi-Tsung Chang, Lin-Jun Zhang, Ray-Ming Lin

Publisher page

Abstract

This paper reports an AlGaN-based narrow-band ultraviolet-B (NB-UVB) light-emitting diode (LED) exhibiting a single electroluminescence peak with a full-width at half-maximum (FWHM) of less than 10 nm at forward currents (If) from 10 to 200 mA, broadening to 11.6 nm when the forward current reached 350 mA. We attribute the narrow FWHM to effectively decreasing the degrees of piezoelectric polarization in the MQWs, and the excess electron overflow from the MQW to the p-layer was avoided. The maximum external quantum efficiency (EQE) of 2.16% and wall plug efficiency of 1.74% occurred when the forward current was 10 mA; the EQE dropped by 8.6% when the forward current increased from 10 to 60 mA. Furthermore, the light output power decreased to 85.4 and 82.5% of its initial value after 620 and 3500 h, respectively, under conditions of 60 mA dc aging. The characteristics of this NB-UVB LED suggest great potential for its application in phototherapy.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: GaN-based semiconductor devices and materials · Ga2O3 and related materials · Photocathodes and Microchannel Plates

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Electronic Engineering and Institute of Electronics Engineering, Chang Gung University, Taoyuan 33302, Taiwan (R.O.C.)

Department of Radiation Oncology, Chang Gung Memorial Hospital, Keelung 20401, Taiwan

Jiangxi Litkconn Academy of Optical Research Co., Ltd, Longnan City 341700, Jiangxi, P. R. China

Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, P. R. China

Department of Physics, School of Science, Jimei University, Xiamen 361021, P. R. China

Department of Radiation Oncology, Chang Gung Memorial Hospital, Linkou 33305, Taiwan (R.O.C.)

Funding

Ministry of Science and Technology, Taiwan · Chang Gung Memorial Hospital

References (26)

Show source-provided references
1. 10.1038/s41566-019-0359-910.1038/s41566-019-0359-9 ↗
2. 10.1088/1361-6633/abde9310.1088/1361-6633/abde93 ↗
3. 10.1016/j.nanoen.2020.10514910.1016/j.nanoen.2020.105149 ↗
4. Kneissl M. · 201610.1007/978-3-319-24100-5 ↗
5. 10.1111/lam.1230110.1111/lam.12301 ↗
6. 10.1149/1.240785310.1149/1.2407853 ↗
7. 10.7567/1347-4065/aaea6a10.7567/1347-4065/aaea6a ↗
8. 10.1039/C8TC03825B10.1039/C8TC03825B ↗
9. 10.1159/00033527210.1159/000335272 ↗
10. 10.1111/1523-1747.ep1252002210.1111/1523-1747.ep12520022 ↗
11. 10.7567/1347-4065/ab460b10.7567/1347-4065/ab460b ↗
12. 10.1002/pssa.20190018510.1002/pssa.201900185 ↗
13. 10.1364/OL.43193310.1364/OL.431933 ↗
14. 10.1002/adfm.20190544510.1002/adfm.201905445 ↗
15. 10.1002/pssa.20170064310.1002/pssa.201700643 ↗
16. 10.1016/j.jcrysgro.2017.01.05210.1016/j.jcrysgro.2017.01.052 ↗
17. 10.1117/12.207742610.1117/12.2077426 ↗
18. 10.1117/12.225057310.1117/12.2250573 ↗
19. 10.1021/acsaelm.0c0017210.1021/acsaelm.0c00172 ↗
20. 10.1002/pssa.20102614910.1002/pssa.201026149 ↗
21. 10.1063/1.280029010.1063/1.2800290 ↗
22. 10.1063/1.357065610.1063/1.3570656 ↗
23. 10.1063/1.492965610.1063/1.4929656 ↗
24. 10.1063/1.218742910.1063/1.2187429 ↗
25. 10.1063/1.502804710.1063/1.5028047 ↗
26. 10.1364/PRJ.7.000B3610.1364/PRJ.7.000B36 ↗