Spray-coated perovskite hemispherical photodetector featuring narrow-band and wide-angle imaging.

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 (PEA₂FA_n-1Pb_nX_3n+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 pho

SUBMITTER: Feng X 

PROVIDER: S-EPMC9569351 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature