Anomalous photoluminescence in InP1-xBix

Xiaoyan Wu, Xiren Chen, Wenwu Pan, Peng Wang, Liyao Zhang, Yaoyao Li, Hailong Wang, Kai Wang, Jun Shao, Shumin Wang

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Low temperature photoluminescence (PL) from InP1-xBix thin films with Bi concentrations in the 0-2.49% range reveals anomalous spectral features with strong and very broad (linewidth of 700 nm) PL signals compared to other bismide alloys. Multiple transitions are observed and their energy levels are found much smaller than the band-gap measured from absorption measurements. These transitions are related to deep levels confirmed by deep level transient spectroscopy, which effectively trap free holes and enhance radiative recombination. The broad luminescence feature is beneficial for making super-luminescence diodes, which can theoretically enhance spatial resolution beyond 1 μm in optical coherent tomography (OCT).
Original languageEnglish
Pages (from-to)27867
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 1 Jun 2016
Externally publishedYes

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