... transparent electrodes in many types of thin film solar cells, such as a-Si thin film solar cells, CdTe thin film solar cells, and CIGS thin film solar cells. It should be mentioned that, for ... transport in high-efficiency ZnO/SiO2/Si solar cells , Solar Energy Materials and Solar Cells 90,(2006) pp.3261-3267 Solar Cells – Thin- Film Technologies 126 Fig. 2. Bandgap structure ... transparency. Solar Cells – Thin- Film Technologies 110 Olsen, L. C., Addis, F. W. & Miller, W. (1981-1983). Experimental and theoretical studies of Cu2O solar cells. Sol. Cells, Vol....