Abstract
Strontium-doped Cu2O thin films of different doping concentrations (0, 3, 5 and 7%) are deposited successfully with the help of Nebulizer spray technique. All the samples were characterized by XRD, AFM, Raman, UV-Vis, photoluminescence and Hall effect, and solar cell efficiency is calculated. From the XRD studies, the cubic structural phase of Cu2O is confirmed. The micrographs of AFM explain that the particles were uniformly distributed on the surface with homogeneous grains. The band gap value ranges from 2.17 to 1.95 eV as the doping concentration increases from 0 to 7%. The PL emission at similar to 630 nm also confirms the cuprous oxide phase. The deposited film exhibits p-type conductivity with low resistivity of 0.90 x 10(2) omega cm and high carrier concentration of 22.7 x 10(15) cm(-3). A heterojunction solar cell of FTO/n-ZnO/p-Sr-doped Cu2O is fabricated, and the power conversion efficiency (eta) is 0.75% for 7% Sr-doped film.