| Summary: | We have fabricated planar interdigitated photodetectors exhibiting high responsivity. These detectors are based on thin layers of methylammonium lead bromide (MAPbBr<sub>3</sub>) at 90 nm thickness. MAPbBr<sub>3</sub> thin films were first characterized on glass (borosilicate) substrates using absorption and photoluminescence measurements showing a high absorption edge at 521 nm and strong emission at 530 nm, as expected. MAPbBr<sub>3</sub> thin films were then deposited on top of interdigitated electrodes, hence producing planar photodetectors with responsivity up to 0.4 A/W. Such higher performances were attributed to the interdigitated design, low crack density (0.05 µm<sup>−2</sup>), and lower resistivity (20 MΩ.cm) compared to MAPbBr<sub>3</sub> single crystal. Therefore, this work highlights MAPbBr<sub>3</sub> thin films as very promising for photodetection applications.
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