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Comparison of X-Ray and Proton Irradiation Effects on the Characteristics of InGaN/GaN Multiple Quantum Wells Light-Emitting Diodes

  • Lei Wang
  • , Ningyang Liu
  • , Bo Li
  • , Huiping Zhu
  • , Xiaoting Shan
  • , Qingxi Yuan
  • , Xuewen Zhang
  • , Zheng Gong
  • , Fazhan Zhao
  • , Naixin Liu
  • , Mengxin Liu
  • , Binhong Li
  • , Jiantou Gao
  • , Yang Huang
  • , Jianqun Yang
  • , Xingji Li
  • , Jiajun Luo
  • , Zhengsheng Han
  • , Xinyu Liu
  • Key Laboratory of Silicon Device Technology
  • Guangdong Institute of Semiconductor Industrial Technology
  • CAS - Institute of High Energy Physics
  • Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of the white-light X-ray and 170-keV proton beam irradiation on the electrical and optical characteristics of the InGaN/GaN multiple quantum wells (MQWs) light-emitting diodes (LEDs) are analyzed and compared. Different from the negative effects of the proton irradiation, the X-ray irradiation shows positive effects on the LEDs' performance. In detail, after the 100 Mrad(Si) X-ray irradiation, the p-n junction resistance decreases from the original 2.51 to 2.08Ω , the light output power increases from 170 to 203 mW (at a forward voltage of 3.2 V), and the maximal external quantum efficiency (EQE) increases from 56.7% to 61.8%. Based on the ABC model fittings, both the Shockley-Read-Hall recombination rate and the radiative recombination rate in the MQWs are improved by the X-ray irradiation. The Hall effect measurements reveal the chemical bond breaking of the Mg-H complex in the p-type GaN. Therefore, the improvement of the LED by the X-ray irradiation should be caused by the chemical bond variations of the defect-related complex in the MQWs and the Mg-H complex in the p-type GaN.

Original languageEnglish
Article number9003180
Pages (from-to)1345-1350
Number of pages6
JournalIEEE Transactions on Nuclear Science
Volume67
Issue number7
DOIs
StatePublished - Jul 2020
Externally publishedYes

Keywords

  • ABC model
  • InGaN/GaN multiple quantum wells (MQWs)
  • Mg-H
  • X-ray
  • external quantum efficiency (EQE)
  • hall measurement
  • p-type GaN
  • proton

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