Abstract
Self-powered broadband photodetector was fabricated using PbS/CdS-decorated TiO2 nanorods (NRs). TiO2 NRs were grown using hydrothermal method and CdS/PbS layers were deposited by chemical bath deposition process. Metal-free top electrode of the photodetector was prepared using chemically reduced graphene oxide (rGO). PbS/CdS-decorated TiO2 NRs based photodetector showed significant photocurrent over broad spectral range. The maximum responsivity \((R_{\lambda } ) \) and detectivity (\(D_{\lambda }\)) of the photodetector at zero bias was obtained, ~0.34 A W–1 and ~162742.42 Hz1/2 W–1, respectively, at 400 nm. TiO2/CdS/PbS/rGO device showed sharp rise and decline of photocurrent under ON/OFF of white light. This device also demonstrated excellent self-powered nature with open circuit voltage ~0.40 V, short circuit current ~0.077 mA and power conversion efficiency ~0.16%.
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We acknowledge the Central Research Facility (CRF) of NIT Agartala for XRD characterizations. We also acknowledge the DST-FIST project, Department of Physics, for UV-VIS-NIR spectroscopy measurements.
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Deka, N., Chakraborty, P., Patra, D.C. et al. Study of self-powered and broadband photosensing properties of CdS/PbS-decorated TiO2 nanorods/reduced graphene oxide junction. Bull Mater Sci 44, 289 (2021). https://doi.org/10.1007/s12034-021-02574-4
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DOI: https://doi.org/10.1007/s12034-021-02574-4