Fig. 1. Process flow of perovskite /ZnO composite photodetector

Fig. 2. Device structure and working mechanism

Fig. 3. Characterization of CsPbBrI₂ perovskite films

Fig. 4. Absorption spectra and PL spectra

Fig. 5. Transferring characteristic curves of phototransistor under illumination

Fig. 6. Performance parameters of CsPbBrI₂/ZnO photodetector

Fig. 7. Optical switch response curves and transient response time of CsPbBrI₂/ZnO photodetector