Effect of P-type last barrier on efficiency droop of blue InGaN light-emitting diodes

Yen Kuang Kuo, Miao Chan Tsai, Sheng Horng Yen, Ta Cheng Hsu, Yu Jiun Shen

Research output: Contribution to journalArticle

93 Citations (Scopus)


P-type doping in the last barrier is proposed to improve the efficiency droop of the blue InGaN light-emitting diodes (LEDs). The lightcurrent curves, energy band diagrams, carrier concentrations, radiative recombination efficiency, and internal quantum efficiency of the blue LEDs under study are investigated. The simulation results show that the efficiency droop is significantly improved when the last undoped GaN barrier in a typical blue LED is replaced by a p-type GaN barrier. The simulation results suggest that the improvement in efficiency droop is mainly due to the decrease of electron current leakage and increase of hole injection efficiency.

Original languageEnglish
Article number31
Pages (from-to)1214-1220
Number of pages7
JournalIEEE Journal of Quantum Electronics
Issue number8
Publication statusPublished - 2010 May 3


All Science Journal Classification (ASJC) codes

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

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