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Growth and structural characteristics of the chalcopyrite semiconductor CuInSe 2
Author(s) -
Janam Ram,
Srivastava O. N.
Publication year - 1983
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170181204
Subject(s) - chalcopyrite , heterojunction , sphalerite , tetragonal crystal system , semiconductor , materials science , phase (matter) , semiconductor materials , optoelectronics , chemistry , crystal structure , crystallography , metallurgy , copper , pyrite , organic chemistry
The growth and structural characteristics of chalcopyrite semiconductor CuInSe 2 have been investigated with particular emphasis on the photovoltaic behaviour of the CdS/CuInSe 2 thin film heterojunction. It has been found that the structural phase of the CuInSe 2 has an important bearing on the photovoltaic behaviour of the heterojunction. Thus the heterojunctions having the sphalerite type cubic CuInSe 2 as one of its component have been found to possess better conversion effciency than those employing the chalcopyrite type tetragonal form of CuInSe 2 . Evidences and argument have been put forward to show that the better efficiency with sphalerite phase arises due to smaller lattice mismatch with CdS base. In addition to the type of structural phase, the state of order of CuInSe 2 phase has been found to affect the performance of heterojunctions. The heterojunctions having the disordered sphalerite type CuInSe 2 structure exhibits a much lower efficiency than those embodying the ordered CuInSe 2 phase.