Fig. 1. Characterization of morphology and photoelectric properties of ZnO microwires. (a) SEM image of ZnO MWs with photoluminescence spectrum of ZnO MW shown in insert; (b) voltage-current characteristic curves of ZnO MW; (c) full spectral response of ZnO MW; (d) current-time characteristic curve of ZnO MW photodetector

Fig. 2. Characterization of morphology and luminescence characteristics of ZnO MWs modified by CdSe quantum dots. (a) Photoluminescence and absorbance spectra of CdSe QDs with physical picture of CdSe QDs shown in insert; (b) TEM image of CdSe QDs modified ZnO MW with partial enlargement shown in inset; (c) comparison of photoluminescenc spectra of ZnO MW and CdSe QDs modified ZnO MW; (d) comparison of light and dark currents of ZnO MW and CdSe QDs modified ZnO MW

Fig. 3. Characterization of photoelectric properties of ZnO MWs modified by CdSe quantum dots. (a) Current-voltage curves of CdSe QDs modified ZnO MW photodetector under different power densities; (b) responsivity comparison of ZnO MWs and CdSe QDs modified ZnO MW under different laser powers; (c) spectral response curve of CdSe QDs modified ZnO MW at 0.5 V with rapid separation mechanism of CdSe QDs modified ZnO MW shown in inset; (d) current-time characteristic curve of CdSe QDs modified ZnO MW

Fig. 4. Comparison of rise and decay time of ZnO MW and CdSe QDs modified ZnO MW. (a) ZnO; (b) ZnO＋CdSe QDs

Fig. 5. Temperature dependences of light and dark currents of CdSe QDs modified ZnO MW photodetector before and after annealing