Nitride-based near-ultraviolet multiple-quantum well light-emitting diodes with AlGaN barrier layers

C. H. Kuo, S. J. Chang, Y. K. Su, L. W. Wu, J. K. Sheu, T. C. Wen, W. C. Lai, J. M. Tsai, S. C. Chen

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The In0.05Ga0.95N/GaN, In0.05Ga0.95N/Al0.01Ga0.9N, and In0.05Ga0.95N/Al0.18Ga0.82N multiple-quantum well (MQW) light-emitting diodes (LEDs) were prepared by metal-organic chemical-vapor deposition. (MOCVD). It was found that the 20-mA electroluminescence (EL) intensity of the InGaN/Al0.1Ga0.9N MQW LED was two times larger than that of the InGaN/GaN MQW LED. The larger maximum-output intensity and the fact that maximum-output intensity occurred at a larger injection current suggest that Al0.1Ga0.9N-barrier layers can provide a better carrier confinement and effectively reduce leakage current. In contrast, the EL intensity of the InGaN/Al0.18Ga0.82N MQW LED was smaller because of the relaxation that occurred in the MQW active region of the sample.

Original languageEnglish
Pages (from-to)415-418
Number of pages4
JournalJournal of Electronic Materials
Issue number5
Publication statusPublished - 2003 May

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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