, Volume 23, Issue 11, pp 4071-4075

Optical properties of CulnSe2 thin films

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Abstract

The optical constants of vacuum-deposited CulnSe2 films were determined from the measured transmittance and reflectance at normal incidence of light in the wavelength range 500 to 2000 nm. The analysis of the experimental points of the absorption coefficient revealed the existence of two optical transition processes: an allowed direct transition withE g=1.03±0.01 eV and a forbidden direct transition withE f=1.254±0.001 eV. The optical constants of the films were independent of the substrate temperature.

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