The photoelectric property and thermoelectromotive force of CdIn_2O_4 or CIO thin film deposited by way of DC reactive magnetron sputtering process were investigated, as well as the effects of the O_2 concentration in reacting gas and annealing process on the property of CIO films. The results showed that CIO thin films have favorable conductivity and transmittance within visible spectrum, and the annealing process can improve obviously the transmittance and carrier concentration of the thin films. This is ...