Improving Crystalline Quality of Non-Vacuum Processed Cu(In,Ga) Se-2 Thin Films by Femtosecond Laser Annealing

Abstract

We demonstrate the advantages of femtosecond laser annealing on non-vacuum CIGS thin films. The PL spectra implied some defect-levels or band-fluctuations were eliminated, and the conversion efficiency and ideal factor were enhanced after laser annealing.