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Title: Ordered defect compounds in CuInSe{sub 2} for photovoltaic solar cell application

Due to the complete compensation, defect complex (2V{sub Cu}+In{sub Cu}), namely two Cu vacancies and In located at Cu site, is stable in CuInSe{sub 2} (CIS). It is known that the series of ordered defect compounds (ODC) are constracted by ordering the defect complex. Based on the total energy calcalation by using the Korringa-Kohn-Rostoker coherent potential approxiamtion (KKR-CPA) method, we discuss phase separation of the CIS with the defect complexes into ODC and CIS. Since the band alignment between ODC and CIS is calculated to be type 2, effective electron-hole separation at the interface between ODC and CIS can be expected. This causes the enhancement of conversion efficiency of CIS-based solar cell materials.
Authors:
 [1] ;  [2]
  1. Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University and PRESTO, Japan Science and Technology Agency (JST) (Japan)
  2. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University (Japan)
Publication Date:
OSTI Identifier:
22263679
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1583; Journal Issue: 1; Conference: ICDS-2013: 27. international conference on defects in semiconductors, Bologna (Italy), 21-26 Jul 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CONVERSION; DEFECTS; EFFICIENCY; PHOTOVOLTAIC EFFECT; SOLAR CELLS