GaInNAs p-i-n photodetectors with multiquantum wells structure

Yung Feng Chen, Wei Cheng Chen, Wen-Kuei Chuang, Yan Kuin Su, Huo Lieh Tsai

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

GaInNAs/GaAs p-i-n photodetectors with 3 and 15 periods multiquantum wells (MQW) as the i-layer have been grown by metal-organic vapor-phase epitaxy (MOVPE). The cutoff wavelength of spectral responsivity occurs at around 1150nm and reflects the transition energy of the GaInNAs/GaAs MQW. Because of to the good crystal quality that the devices with three periods MQW have, a two orders of magnitude increase in the responsivity rejection ratio is realized between 1150 and 1250 nm at a reverse bias of 2.0 V. The junction breakdown voltage is obtained at a reverse bias of 18.4 V. The ideality factor indicates that the conduction mechanism is dominated by the diffusion process, and the defect scattering effect caused by the misfit dislocations is only slight. On the other hand, the device with 15 periods MQW induces a higher value of misfit dislocations, and shows a partial relaxation phenomenon and thus it shows relatively poor characteristics.

Original languageEnglish
Pages (from-to)2982-2986
Number of pages5
JournalJapanese Journal of Applied Physics
Volume47
Issue number4 PART 2
DOIs
Publication statusPublished - 2008 Apr 25

All Science Journal Classification (ASJC) codes

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

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