Architectures for Efficient Photoelectrochemical Solar Cell Devices Giovanni Zangari, Dept. of Materials Science and Engineering, U. of Virginia, Charlottesville VA 22904 Suitable combinations of semiconductors made by wet chemistry routes may provide for increased solar light absorption and enhanced electron-hole separation, to achieve better efficiency. Surface modification with metallic nanostructures is expected to result in high catalytic activity for electrochemical hydrogen formation Cu2O TiO2 ITO Modification of TiO2 with Cu2O enhances photoelectrochemical response, but results in recrystallization of Cu2O In collaboration with N Swami and L Wu, ECE UVA