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Deep-UV light detection has important application in surveillance and homeland security regions. CH 3 NH 3 PbX 3  (X = Cl, Br, I) materials have outstanding optical absorption and electronic transport properties suitable for obtaining excellent deep-UV photoresponse. In this work, we have grown high-quality CH 3 NH 3 PbX 3  (X = Cl, Br, I) bulk crystals and used them to fabricate photodetectors. We found that they all have high-sensitive and fast-speed response to 255 nm deep-UV light. Their responsivities are 10–10 3  times higher than MgZnO and Ga 2 O 3  detectors, and their response speeds are 10 3  times faster than Ga 2 O 3  and ZnO detectors. These results indicate a new promising route for deep-UV detection.

High-sensitive and fast response to 255 nm deep-UV light of CH 3 NH 3 PbX 3 (X = Cl, Br, I) bulk crystals

High-sensitive and fast response to 255 nm deep-UV light of CH ₃ NH ₃ PbX ₃ (X = Cl, Br, I) bulk crystals