In CIGS and CdTe technologies, nanostructured aluminium zinc oxide layer is used as TCO and is deposited on the top of the absorber and intermediate layer by magnetron sputtering. But in case of a-Si, nanostructured AlZnO is used as the reflective layer on lower substrate or as TCO on top layer. The nanostructured AlZnO has high transparency to visible and near infrared solar spectrum and low electrical resistivity. This also provides textured surface geometry, which enhances the reflection and has high chemical stability and provide better efficiency [97].