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Title: Radiation response of multi-quantum well solar cells: Electron-beam-induced current analysis

Solar cells utilizing multi-quantum well (MQW) structures are considered promising candidate materials for space applications. An open question is how well these structures can resist the impact of particle irradiation. The aim of this work is to provide feedback about the radiation response of In{sub 0.01}Ga{sub 0.99}As solar cells grown on Ge with MQWs incorporated within the i-region of the device. In particular, the local electronic transport properties of the MQW i-regions of solar cells subjected to electron and proton irradiation were evaluated experimentally using the electron beam induced current (EBIC) technique. The change in carrier collection distribution across the MQW i-region was analyzed using a 2D EBIC diffusion model in conjunction with numerical modeling of the electrical field distribution. Both experimental and simulated findings show carrier removal and type conversion from n- to p-type in MQW i-region at a displacement damage dose as low as ∼6.06–9.88 × 10{sup 9} MeV/g. This leads to a redistribution of the electric field and significant degradation in charge carrier collection.
Authors:
; ; ;  [1] ; ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ; ;  [7]
  1. Naval Research Laboratory, Washington, DC 20375 (United States)
  2. The George Washington University, Washington, DC 20052 (United States)
  3. Sotera Defense Solutions, Herndon, Virginia 20171 (United States)
  4. University of Maryland Baltimore County, Baltimore, Maryland 21250 (United States)
  5. QuantaSol Ltd, Kingston-upon-Thames KT1 3GZ (United Kingdom)
  6. Japan Aerospace Exploration Agency (JAXA), Tsukuba, Ibaraki 305-8505 (Japan)
  7. Japan Atomic Energy Agency (JAEA), Takasaki, Gunma 370-1292 (Japan)
Publication Date:
OSTI Identifier:
22493113
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHARGE CARRIERS; DAMAGE; ELECTRIC FIELDS; ELECTRON TRANSFER; ELECTRONS; EXPERIMENT RESULTS; GALLIUM ARSENIDES; GERMANIUM; INDIUM ARSENIDES; MEV RANGE; N-TYPE CONDUCTORS; PROTONS; P-TYPE CONDUCTORS; QUANTUM WELLS; RADIATION DOSES; SCANNING ELECTRON MICROSCOPY; SIMULATION; SOLAR CELLS