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Investigation of InAs/GaAs1-xSbx quantum dots for applications in intermediate band solar cells

  • Y. Cheng
  • , M. Fukuda
  • , V. R. Whiteside
  • , M. C. Debnath
  • , P. J. Vallely
  • , A. J. Meleco
  • , A. J. Roeth
  • , T. D. Mishima
  • , M. B. Santos
  • , K. Hossain
  • , S. Hatch
  • , H. Y. Liu
  • , I. R. Sellers
  • University of Oklahoma
  • Amethyst Research Inc
  • University College London

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The reduction of the effective band gap and the valence band offset are observed by increasing the Sb composition in GaAs1-xSbx matrix encapsulating InAs quantum dots (QDs). To investigate the potential of the InAs/GaAs1-xSbx system for intermediate band solar cells a p-i-n solar cell with a degenerate valence band is grown. An enhancement in the QDs region with increasing temperature is observed in temperature dependent external quantum efficiency measurements. An 's-shape' behavior of the short circuit current density, Jsc, is observed as the temperature increases. Ongoing investigations to illuminate the physical mechanisms contributing to the 's-shape' behavior of Jsc will also be presented.

Original languageEnglish
Title of host publication2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3371-3375
Number of pages5
ISBN (Electronic)9781509056057
DOIs
StatePublished - 2017
Event44th IEEE Photovoltaic Specialist Conference, PVSC 2017 - Washington, United States
Duration: Jun 25 2017Jun 30 2017

Publication series

Name2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017

Conference

Conference44th IEEE Photovoltaic Specialist Conference, PVSC 2017
Country/TerritoryUnited States
CityWashington
Period06/25/1706/30/17

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