Highly Reliable Nitride-Based LEDs with SPS+ITO Upper Contacts

S. J. Chang, C. S. Chang, Y. K. Su, R. W. Chuang, Y. C. Lin, S. C. Shei, H. M. Lo, H. Y. Lin, J. C. Ke

Research output: Contribution to journalArticlepeer-review

134 Citations (Scopus)


Nitride-based blue light emitting diodes (LEDs) with an n+ -short period superlattice (SPS) tunnel contact layer and an indium tin oxide (ITO) transparent contact were fabricated. Compared with conventional nitride-based LEDs with Ni/An upper contacts, it was found that we could achieve a 60% increase in electro-luminescence (EL) intensity by using ITO upper contacts. However, it was also found that the lifetime of ITO LEDs were much shorter. Furthermore, it was found that we could achieve a longer lifetime and a smaller reverse leakage current (IR) by the deposition of a SiO2 layer on top of the ITO LEDs.

Original languageEnglish
Pages (from-to)1439-1443
Number of pages5
JournalIEEE Journal of Quantum Electronics
Issue number11
Publication statusPublished - 2003 Nov

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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