Growth, microstructure, optical and electrical properties of sprayed CuInSe{sub 2} polycrystalline films
- Faculty of Science, Physics Department, El-Minia University (Egypt)
Polycrystalline thin films of CuInSe{sub 2} have been prepared by chemical spray pyrolysis technique as a function of Cu/In ratio. Incremental growth of the various ratios followed at different substrate temperatures ranging from 548 to 623 K. Characterizations by means of compositional analysis, X-ray diffraction and spectrophotometry measurements have been carried out. Voigt profile method has been used to determine the microstructure parameter (crystallite/domain size and macrostrain). The effect of Cu/In ratio as well as substrate temperature on the optical features (absorption coefficient and band gap) of these films has been investigated. The films of different Cu/In ratios (0.9-1.1) displayed a band gap from 0.92 to 1.025 eV for direct transition. The dark resistivity measurements at room temperature of Cu-rich samples show about five orders of magnitude higher than that of In-rich samples.
- OSTI ID:
- 21144027
- Journal Information:
- Materials Research Bulletin, Vol. 43, Issue 6; Other Information: DOI: 10.1016/j.materresbull.2007.06.018; PII: S0025-5408(07)00259-0; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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