Novel Sol-gel Route to Synthesize Transparent Conductive Oxides for Front Contact of Solar Cells

Abstract

The thin films of transparent conductive zinc oxide (ZnO) are synthesized by novel sol gel spin coating method. We deposit thin films as primary application of front contact of the thin film solar cells such as Cu2 (Zn,Sn)S4(CZTS). The thin films are deposited by varying the molar concentration of the zinc oxide solution with different molar concentrations. The effect of molar concentration and annealing are temperature dependent. The main orientation of the deposited ZnO are observed at (101) peak by X-Ray diffraction (XRD) micrographs. We observed the optical transmittance of our samples by optical spectroscopy and one of them showed the transmittance more than 90%. The deposited thin films show high transparency and are the potential candidate to be used as window layer in thin film based solar cells.