Theoretical analysis of photo-recycling effect on external quantum efficiency considering spatial carrier dynamics

Hidehiro Asai, Kazunobu Kojima, Shigefusa F. Chichibu, Koichi Fukuda

Research output: Contribution to journalArticle

Abstract

We discuss the effect of photo-recycling effect on the external quantum efficiency (EQE) of radiation of semiconductor samples, considering spatial carrier dynamics. We find that the photo-recycling effect keeps a high concentration of photo-excited carrier in the sample, and it dramatically enhances the EQE. However, the strong carrier diffusion caused by the photo-recycling effect decreases the light extraction efficiency, and suppresses the EQE enhancement. Our analysis of the photo-recycling effect paves the way for accurate evaluation of crystal quality of semiconductors from the EQE.

Original languageEnglish
Article numberSGGK02
JournalJapanese journal of applied physics
Volume59
Issue numberSG
DOIs
Publication statusPublished - 2020 Apr 1

ASJC Scopus subject areas

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

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