Nanoscale investigation of grain boundary characteristics of single-crystalline-like GaAs films and solar cells on flexible metal substrates

Pavel Dutta, Jonathan Poplawsky, Harvey Guthrey, Monika Rathi, Devendra Khatiwada, Sicong Sun, Yao Yao, Bo Yu, Eduard Galstyan, Venkat Selvamanickam

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

1 Scopus citations

Abstract

High-resolution imaging with nanometer spatial resolution was carried out to unravel the grain and grain boundary (GB) properties of single-crystalline-like n-type GaAs films and single-junction solar cells on epi-ready flexible metal substrates. Electron Back Scattered Diffraction studies revealed ultra-low angle GBs with the presence of twin boundaries. The pn junction carrier collection properties were directly imaged using cross-sectional Electron Beam Induced Current measurements. Low-temperature Cathodoluminescence imaging indicated a strong component of optical emission from the GBs. Comprehensive studies of the structural, chemical, optical and electrical properties were carried out to unravel the fundamental GB properties of flexible GaAs films on metal substrates.

Original languageEnglish
Title of host publication2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages58-61
Number of pages4
ISBN (Electronic)9781538685297
DOIs
StatePublished - Nov 26 2018
Event7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - Waikoloa Village, United States
Duration: Jun 10 2018Jun 15 2018

Publication series

Name2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC

Conference

Conference7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018
Country/TerritoryUnited States
CityWaikoloa Village
Period06/10/1806/15/18

Keywords

  • MOCVD
  • epitaxial growth
  • flexible substrate
  • gallium arsenide
  • photovoltaic cells

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