Optimization of the CdS Buffer Layer in Effective Solar Cells Based on Cu(In,Ga)Se2.

The dependence of the microstructure and spectral parameters of thin cadmium sulfide layers on the thickness of these layers and conditions of their chemical deposition from salt solutions has been investigated by methods of absorption spectroscopy and atomic‐force microscopy. The chemical composition of the mixture of salt solutions and conditions of deposition of homogeneous buffer layers of definite thickness, the optimum structure, and reproducible composition have been determined on the basis of experimental data. Our investigations have made it possible to fabricate film‐type solar cells based on Cu(In,Ga)Se₂ with a conversion efficiency of 10–11%. [ABSTRACT FROM AUTHOR]