Preparation and performance of self-powered Ag/Bi2O3 nanoblocks ultraviolet photodetector
To effectively detect ultraviolet(UV)light without an external power source,a self-powered UV photodetector(UVPD)was developed using Ag/Bi2O3 nanoblocks.Initially,Bi2O3 nanoblocks were prepared through a calcination process,followed by the successful synthesis of Ag/Bi2O3 nanoblocks by de-positing Ag nanoparticles on their surface via a solution reaction method at room temperature.The crystal structure and microstructures of the samples were analyzed,revealing that the Ag/Bi2O3 nanoblocks had an average diameter of approximately 1 μm,with Ag nanoparticles randomly distributed on the surface of the Bi2O3 nanoblocks.The Ag/Bi2O3 nanoblocks were then coated on FTO as the working electrode,lead-ing to the construction of the self-powered UVPD.Upon exposure to UV light(365 nm),the Ag/Bi2O3 nanoblocks UVPD quickly detected UV light at zero bias voltage,showcasing its self-powered capability.Compared to the Bi2O3 nanoblocks UVPD,the Ag/Bi2O3 nanoblocks UVPD displayed significantly im-proved photocurrents,with rise and decay times reduced to 29.1 ms and 40.2 ms,respectively,and dem-onstrated excellent cycling stability.
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