Some results from CuGaSe2 solar cells prepared by rapid thermal processing

We report measurements on CuGaSe2 solar cells and absorbers prepared by rap id thermal processing of stacked elemental layers deposited by evaporation, in situ conductivity measurements are presented as a method of absorber ch aracterization. I-V-curves, spectral response and EBIC measurements are per formed, A selenium deficiency in the absorber is one of the first obstacles that this formation process needs to overcome. A second selenisation step is of some help but better process parameters need to be found. The main li mitations of the cells are the small open circuit voltage (<600 mV) and fil l factor (<0.55). Spectral Response measurements reveal a poor performance in the long wavelength region. (C) 2000 Elsevier Science S.A. All rights re served.