Annealing Effects on Photoconductivity Spectra of CuInSe2 Single Crystals

Abstract
Photoconductivity spectra of as‐grown n‐type and p‐type CuInSe2 single crystals and of crystals annealed under maximum and minimum selenium pressure are measured in the photon energy range hv = 0.75 – 3.0 eV and as a function of temperature in the range T = 80 – 320 K. A model with trapping of minority carriers is used to explain the temperature dependence of the photoconductivity. The trap energies present in the samples depend on their preparation conditions.