Figure 5

EL spectra of the MIS devices and AFM image of the ZnO thin film. (a) EL spectra of the MIS devices. The inset of (a) is the schematic diagram of the MIS devices. (b) AFM image of the ZnO thin film.
EL spectra of the MIS devices and AFM image of the ZnO thin film. (a) EL spectra of the MIS devices. The inset of (a) is the schematic diagram of the MIS devices. (b) AFM image of the ZnO thin film.