Fig. 4

a Absorption spectra and b Tauc plots of the ZnO nanorods on IGZO glass and the p-Cu2O/i-ZnO nanorods/n-IGZO heterojunction
a Absorption spectra and b Tauc plots of the ZnO nanorods on IGZO glass and the p-Cu2O/i-ZnO nanorods/n-IGZO heterojunction