Effects of various carboxylic acids on properties of chemical-bath-deposited In(S,O,OH) films as buffer layers for Cu(In,Ga)Se2 solar cells

摘要

The surface morphologies,compositions,crystal structures,and optical properties of In(S,O,OH) films deposited with the carboxylic acids such as acetic acid,citric acid,formic acid,or succinic acid on the soda-lime glass substrates by the chemical bath deposition (CBD) process were investigated.The conformal coverage of In(S,O,OH) films on the glass substrates was achieved by optimizing the pH values in the bath solution.The hexagonal and cubic crystal structure coexisted in the In(S,O,OH) films.Except the succinic acid,the wider bandgap energies of In(S,O,OH) films deposited with the various carboxylic acids than that of CdS films were achieved.