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Jing Liu,Yuanze Xu,Xiaoxiao Liang,Mingming Yan,Bo Wang,Tianchong Zhang,Zhen Hong,Futing Yi 대한금속·재료학회 2021 ELECTRONIC MATERIALS LETTERS Vol.17 No.6
Utilizing silica micropillar arrays as substrate, a kind of Zinc oxide (ZnO) nanowires/Cadmium sulfi de (CdS) nanopillars heterojunctionstructure is prepared successfully by twice hydrothermal reaction method. This ZnO nanowires/CdS nanorods/silicamicropillars structure is tree-liked morphology from the SEM and TEM images, and both the ZnO nanowires and CdS nanorodsare well crystallinity on the silica surface from the X-ray diff raction curves. The CdS nanorods/silica micropillars structure has alow refl ectivity to the incoming light for wavelength from 200 to 800 nm. After the ZnO nanowires growing, the refl ectivity oftree-liked structure is much lower than that without ZnO nanowires especially for the wavelength less than 350 nm. The resistanceresponse of the CdS nanorods/silica micropillars based photoresistors with and without ZnO nanowires are tested. And theresults reveal that the ZnO nanowires covering can improve the response of the CdS nanorods/silica micropillars photoresistors. The best photosensitivity response of the ZnO nanowires/CdS nanorods/silica micropillars photoresistor for 450 nm wavelengthlight with 5 mW/cm 2 illumination can achieve to 23.3, while that for CdS nanorods/silica micropillars photoresistors is 18.8.