Emission mechanism of mixed-color InGaN/GaN multi-quantum-well light-emitting diodes

Shih Chang Shei, Jinn Kong Sheu, Chi Ming Tsai, Wei Chi Lai, Ming Lun Lee, Cheng Huang Kuo

研究成果: Article

33 引文 斯高帕斯(Scopus)

摘要

In this study, GaN-based light-emitting diodes (LEDs) were designed with a multi-quantum-well active region, including a yellow-green and a blue quantum well in each period. Photoluminescence (PL) and electroluminescence (EL) measurements revealed two emission bands (at λ∼ 450 and 560 nm) originating from the two well regions. The ratio of blue to yellow-green emission intensities changes with the excitation intensity. In EL, the intensity of the blue emission peak exceeds that of the yellow-green emission peak when a low DC current (I 40mA) is applied. However, when a high pulsed current is applied (I ≧ 100mA) to the LEDs, the intensity of the yellow-green band exceeds that of the blue band, because of the competition between carrier tunneling and band-to-band recombination.

原文English
頁(從 - 到)2463-2466
頁數4
期刊Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
45
發行號4 A
DOIs
出版狀態Published - 2006 四月 7

    指紋

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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