FABRICATION OF ZNO/CU2O AND TIO2/CU2O HETEROJUNCTION SOLAR CELL USING SPRAY PYROLYSIS METHOD.

FTO-ZnO/Cu2O-Cu and FTO-TiO2/Cu2O-Cu Solar cells were fabricated by electrodeposition of Cu2O on the sprayed pyrolysised ZnO and TiO2 films, the compositional, optical as well as electrical properties of the cell was studied using EDX, UV-Visible and Solar simulator respectively. The optical measurement shows that both ZnO and TiO2 have higher transmittance when compared to Cu2O. The band gap of Cu2O TiO2, and ZnO, were found to be 2.32eV, 3.7eV and 3.75eV respectively. I-V characteristic curve confirm the rectifying behavior of the cells. The short circuit current density, open circuit voltage and efficiency of the cells were measured to be 0.093?A/cm-2, 0.0364V, 0.0076% and 5.8?A/cm-2, 0.03V, 0.037% for FTO-ZnO/Cu2O-Cu and FTO-TiO2/Cu2O-Cu cells respectively.