Significantly improved carrier lifetime and reduced interface recombination velocity for CdTe/MgCdTe double heterostructures

Shi Liu, Xin Hao Zhao, Calli M. Campbell, Maxwell B. Lassise, Yuan Zhao, Yong-Hang Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

The carrier lifetime of CdTe/MgCdTe double heterostructures has been enhanced significantly up to 2.1 μs through using 30 nm Mg0.48Cd0.52Te barriers. Temperature-dependent photoluminescence measurements indicate that the radiative recombination contributes significantly to the total recombination at room temperature, and the internal quantum efficiency is estimated to be 40 %. A radiative and a non-radiative lifetimes have thus been calculated to be 5.25 μs and 3.5 μs, respectively. The interface recombination velocity of CdTe/Mg0.48Cd0.52Te is determined to be smaller than 2.7 cm/s, which is better or very close to the best values reported for GaAs/AlGaAs and GaAs/Ga0.5In0.5P double heterostructures.

Original languageEnglish (US)
Title of host publication2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479979448
DOIs
StatePublished - Dec 14 2015
Event42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States
Duration: Jun 14 2015Jun 19 2015

Other

Other42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
CountryUnited States
CityNew Orleans
Period6/14/156/19/15

Keywords

  • cadmium compounds
  • carrier lifetime
  • photoluminescence
  • semiconductor growth
  • semiconductor materials
  • x-ray diffraction

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Liu, S., Zhao, X. H., Campbell, C. M., Lassise, M. B., Zhao, Y., & Zhang, Y-H. (2015). Significantly improved carrier lifetime and reduced interface recombination velocity for CdTe/MgCdTe double heterostructures. In 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 [7356225] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2015.7356225