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Title: High-performance broadband optical coatings on InGaN/GaN solar cells for multijunction device integration

We demonstrate InGaN/GaN multiple quantum well solar cells grown by metalorganic chemical vapor deposition on a bulk (0001) substrate with high-performance broadband optical coatings to improve light absorption. A front-side anti-reflective coating and a back-side dichroic mirror were designed to minimize front surface reflections across a broad spectral range and maximize rear surface reflections only in the spectral range absorbed by the InGaN, making the cells suitable for multijunction solar cell integration. Application of optical coatings increased the peak external quantum efficiency by 56% (relative) and conversion efficiency by 37.5% (relative) under 1 sun AM0 equivalent illumination.
Authors:
; ; ;  [1] ; ;  [2] ; ; ;  [1] ;  [3]
  1. Materials Department, University of California, Santa Barbara, California 93106 (United States)
  2. Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106 (United States)
  3. (United States)
Publication Date:
OSTI Identifier:
22262572
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 16; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHEMICAL VAPOR DEPOSITION; GALLIUM NITRIDES; QUANTUM EFFICIENCY; QUANTUM WELLS; SOLAR CELLS; SURFACES