Photoluminescence characterization of Cl -- doped Cu$_{2}$O thin film photoelectrodes

Electrodepostion was used to deposit ~Cl-doped Cu$_{2}$O thin films on ITO substrates. Photocurrent and the Photouminescence (PL) measurements were done on prepared electrodes. CuCl$_{2}$ and different pH values of the solution bath were used to control the doping level in Cu$_{2}$O. Photocurrent responses in photoelectrochemical cells clearly showed improved performance over the un-doped Cu$_{2}$O thin films as seen by the difference in the light and the dark current . A deconvoluted PL spectra assuming Gaussian spectral profile showed three underlying peaks. The temperature dependence of the ~peak energy position and intensity was analyzed. Furthermore, the electrodeposition and the nature of the conductivity of the films were also analyzed. These results of the Cl-doped Cu$_{2}$O films will be compared with those for the Cu$_{2}$O un-doped films and presented.