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Opt Express. 2016 Apr 18;24(8):8411-9. doi: 10.1364/OE.24.008411.

Visible blind ultraviolet photodetector based on CH<sub>3</sub>NH<sub>3</sub>PbCl<sub>3</sub> thin film.


We report a prototypical device of CH<sub>3</sub>NH<sub>3</sub>PbCl<sub>3</sub> film ultraviolet photodetectors that were fabricated with a coplanar metal-semiconductor-metal Au interdigital electrode configuration. Pure phase CH<sub>3</sub>NH<sub>3</sub>PbCl<sub>3</sub> films with a good crystallinity were formed by a hybrid sequential deposition process featured with inter-diffusion of PbCl<sub>2</sub> and CH<sub>3</sub>NH<sub>3</sub>Cl upon annealing. The CH<sub>3</sub>NH<sub>3</sub>PbCl<sub>3</sub> film photodetector exhibits a high responsivity of 7.56 A /W at 360 nm, a ultraviolet/visible rejection ratio (R360 nm/R500 nm) was about two orders of magnitude and fast response speed with a rising time of 170 μs and a decay time of 220 μs. All the above results demonstrate CH<sub>3</sub>NH<sub>3</sub>PbCl<sub>3</sub> film photodetector as a competitive candidate in the application of visible blind UV detectors.


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