Journal
OPTICAL AND QUANTUM ELECTRONICS
Volume 52, Issue 4, Pages -Publisher
SPRINGER
DOI: 10.1007/s11082-020-02329-1
Keywords
ZnO; Nanorods; Hydrothermal; Visible-blind photodetector; Photodetector
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In the present work, we have synthesized ZnO nanorods (ZnO NRs) by using hydrothermal technique. The morphological, structural and optical properties of ZnO NRs were investigated using x-ray diffraction (XRD), scanning electron microscope (SEM) and UV-Vis absorption. XRD pattern confirms the deposited film was highly oriented crystalline ZnO NRs along [002] direction. SEM shows the formation of submicron and NRs morphology. The optical absorption studies depict that the optical energy gap of the film was 3.5 eV. The fabricated n-ZnO NRs/p-Si heterojunction photodetector exhibits rectification properties with an ideality factor of 2.2. The highest responsivity and quantum efficiency of the photodetector were nearly 0.27 A/W and 89% at 350 nm, respectively, without using buffer layer.
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