Effect of selenium content of CuInSex alloy nanopowder precursors on recrystallization of printed CuInSe2 absorber layers during selenization heat treatment

Title
Effect of selenium content of CuInSex alloy nanopowder precursors on recrystallization of printed CuInSe2 absorber layers during selenization heat treatment
Author(s)
김우경Armin E. Zaghi[Armin E. Zaghi]Marie Buffiere[Marie Buffiere]구자석Guy Brammertz[Guy Brammertz]Maria Batuk[Maria Batuk]Christophe Verbist[Christophe Verbist]Joke Hadermann[Joke Hadermann]Marc Meuris[Marc Meuris]Jef Poortmans[Jef Poortmans]Jef Vleugels[Jef Vleugels]
Keywords
FILM SOLAR-CELLS; THIN-FILM; NANOPARTICLE PRECURSORS; CIGS; GROWTH; SYSTEM
Issue Date
201505
Publisher
ELSEVIER SCIENCE SA
Citation
THIN SOLID FILMS, v.582, pp.11 - 17
Abstract
Polycrystalline CuInSe2 semiconductors are efficient light absorber materials for thin film solar cell technology, whereas printing is one of the promising low cost and non-vacuum approaches for the fabrication of thin film solar cells. The printed precursors are transformed into a dense polycrystalline CuInSe2 semiconductor film via thermal treatment in ambient selenium atmosphere (selenization). In this study, the effect of the selenium content in high purity mechanically synthesized CuInSex (x= 2, 1.5, 1 or 0.5) alloy precursors on the recrystallization of the CuInSe2 phase during the selenization process was investigated. The nanostructure and phase variation of CuInSex nanopowders were investigated by different characterization techniques. The recrystallization process of the 1-2 mu m thick CuInSex coatings into the CuInSe2 phase during selenization in selenium vapor was investigated via in-situ high temperature X-ray diffraction. The CuInSex precursors with lower selenium content showed a more pronounced phase conversion into CuInSe2 compared to the higher selenium content CuInSex precursors. Moreover, the CuInSex (x= 0.5 and 1) precursor resulted in a denser polycrystalline CuInSe2 semiconductor film with larger crystals. This could be attributed to a more intensive atomic interdiffusion within the CuInSex precursor system compared to a CuInSe2 phase precursor, and the formation of intermediate CuSe and CuSe2 fluxing phases during selenization. (C) 2014 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/32305http://dx.doi.org/10.1016/j.tsf.2014.10.003
ISSN
0040-6090
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공과대학 > 화학공학부 > Articles
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