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- W4306293785 abstract "Sphere imagers featuring specific wavelength recognition and wide-angle imaging are required to meet the fast development of modern technology. However, it is still challenging to deposit high-quality photosensitive layers on sphere substrates from low-cost solution processes. Here we report spray-coated quasi-two-dimensional phenylethylammonium/formamidinium lead halide (PEA2FAn-1PbnX3n+1) perovskite hemispherical photodetectors. The crystallization speed is manipulated by perovskite compositions, and the film thickness can be controlled by spray-coating cycles and solution concentration from tens of nanometers to hundreds of micrometers with a fast velocity of 1.28 × 10-4 cm3 s-1. The lens-free hemispherical photodetectors allow light response at a wide incident angle of 180°. Simultaneously, the wavelength selective response from visible to the near-infrared range is achieved with full width at half maximums (FWHMs) of ~20 nm, comparable to single-crystal devices. Wide-angle and wavelength-selective imaging are also demonstrated, which can find potential applications in intelligent recognition and intraoperative navigated surgery." @default.
- W4306293785 created "2022-10-15" @default.
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- W4306293785 date "2022-10-15" @default.
- W4306293785 modified "2023-10-18" @default.
- W4306293785 title "Spray-coated perovskite hemispherical photodetector featuring narrow-band and wide-angle imaging" @default.
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- W4306293785 doi "https://doi.org/10.1038/s41467-022-33934-1" @default.
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