Filterless Near‐Infrared Narrowband Photodetectors Based on Mixed Metal Perovskite Single Crystals
Jia Liu,
Yifu Chen,
Jixuan Zhou
et al.
Abstract:Iodine‐based Sn‐Pb mixed perovskite single crystals (SCs) are promising candidates for near‐infrared (NIR) narrowband photodetectors due to their low bandgaps. However, they are highly defective when grown in ambient air due to the extremely poor air stability of Sn2+ ions in precursor solutions. It is discovered that the oxidation of Sn2+ to Sn4+ ions not only consumes Sn2+ ions but also increases the precursor solution viscosity. The increased viscosity slows down the solute diffusion and hinders the anisotr… Show more
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