Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells by A Albadarin, Nusayba, Takrif, Mohd Sobri, Tan, Sin Tee, Shahahmadi, Seyed Ahmad, Jeffery Minggu, Lorna, Kadhum, Abdul Amir Hassan, Yin, Wong Wai, Salehmin, Mohd Nur Ikhmal, M Alkhalqi, Ensaf, Abdul Hamid, Muhammad Azmi, Amin, Nowshad