Reducing the current crowding effect on nitride-based light-emitting diodes using modulated p-extension electrode thickness

Chun Kai Wang, Tsung Hsun Chiang, Yu Zung Chiou, Sheng Po Chang

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, nitride-based light-emitting diodes (LEDs) with the modulated thickness of p-extension electrode were proposed and fabricated. The current crowding is always occurred in the end of p-extension electrode. Thus, the resistance of p-extension electrode will be increased by reducing its thickness to prevent current crowding. The modulated thickness of p-extension electrode can be employed to enhance the light output power and reduce overall operated temperature. Compared to the conventional LED, the enhancement in light output power is 13.9% at 150mA and the reduction in average operated temperature is about 14.6% at 80 mA. Regarding the characteristics of electrostatic discharge (ESD), the failure mode of new electrode design occurred on the terminal of thick p-extension electrode rather than current crowding region.

Original languageEnglish
Article number01AG05
JournalJapanese journal of applied physics
Volume52
Issue number1 PART2
DOIs
Publication statusPublished - 2013 Jan 1

All Science Journal Classification (ASJC) codes

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

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