Study of the sub-bandgap absorption and the optical transitions in CuInSe2 polycrystalline thin films

Kavcar N.

SOLAR ENERGY MATERIALS AND SOLAR CELLS, vol.52, pp.183-195, 1998 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 52
  • Publication Date: 1998
  • Doi Number: 10.1016/s0927-0248(97)00287-0
  • Journal Name: SOLAR ENERGY MATERIALS AND SOLAR CELLS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.183-195
  • Keywords: optical transitions, CuInSe2, absorption coefficient, photon energy, SOLAR-CELLS
  • Dokuz Eylül University Affiliated: No

Abstract

Optical transitions near the fundamental band edge are studied for CuInSe2 films having various Cu/In ratios by analysing the variations of the absorption coefficient with incident photon energy. The results indicate different transitions depending upon the Cu/In ratio. There are sub-bandgap absorption for near stoichiometric and Cu-rich films. The results are compared to some literature data. (C) 1998 Elsevier Science B.V. All rights reserved.