Fig. 18: 2D perovskite nanosheets and arrayed photodetector applications.
From: Recent progress in the patterning of perovskite films for photodetector applications
a Schematic of the solution process to fabricate 2D PbI2 nanosheets and the vapor-phase conversion process to transfer PbI2 into 2D MAPbI3 perovskite nanosheets. Reproduced with permission123, Copyright 2016, American Chemical Society. b Left: High-magnification optical image of 2D MAPbI3 nanosheets. Scale bar: 4 μm. Right: Optical images of the as-grown MAPbI3 nanosheet with different thicknesses (thin MAPbI3 sheet with a thicker region at the center). Scale bar: 10 μm. Reproduced with permission123, Copyright 2016, American Chemical Society. c Schematic of a transistor device based on 2D perovskite. Reproduced with permission123, Copyright 2016, American Chemical Society. d Optical image of the 2D perovskite device. Scale bars: 10 μm. Reproduced with permission123, Copyright 2016, American Chemical Society. e photoluminescence map of the 2D perovskite device. Scale bars: 10 μm. Reproduced with permission123, Copyright 2016, American Chemical Society. f Schematic of a digital sensor based on a large-area array 1665-pixel PD. Reproduced with permission117. Copyright 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. g A large-area array MXene electrode and the corresponding microscopic pattern. Scale bar: 1 mm. Reproduced with permission117. Copyright 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. h SEM image of 2D CsPbBr3. Reproduced with permission117. Copyright 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. i Schematic of a single PD based on a MXene electrode. Reproduced with permission117. Copyright 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. j Image of the PDs at a 60° bending angle. Reproduced with permission117. Copyright 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. k SEM image of a perovskite film with a periodic square array pattern. Reproduced with permission117. Copyright 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. l Illustration of the procedures for preparing patterned perovskite films. Reproduced with permission155. Copyright 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. m Optical photograph of a typical 6 × 6 perovskite PD arrays fixed onto a printed circuit board, the inset shows an SEM image of a single pixel device. Reproduced with permission155. Copyright 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. n Schematic of the measurement setup for the perovskite PD arrays to realize visible light imaging sensing. Reproduced with permission155. Copyright 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. o Corresponding 2D current map of the PD arrays upon illumination with white light (350 µW cm−2) and blue light (450 nm, 1.45 mW cm−2). Reproduced with permission155. Copyright 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
