Perovskite quantum dot, deep ultraviolet photoelectric detector and preparation method thereof

Abstract

The invention discloses a perovskite quantum dot, a deep ultraviolet photoelectric detector and a preparation method thereof, the perovskite quantum dot prepared by a solution method is an FAPb1-xSnxI3 quantum dot, FA is formamidine, x is less than or equal to 0.11, the perovskite quantum dot has the characteristics of MEG effect, high quantum efficiency, high stability, surface modification and film preparation, and therefore, the perovskite quantum dot can be applied to the deep ultraviolet photoelectric detector. When the perovskite quantum dot is used as a photosensitive material of a deep ultraviolet photoelectric detector, the light current under deep ultraviolet light reaches up to 117%, which exceeds that of nano-material photoelectric detectors prepared by all solution methods reported at present, and the energy conversion internal quantum efficiency of the deep ultraviolet photoelectric detector is effectively improved. 本发明公开了一种钙钛矿量子点、深紫外光电探测器及其制备方法，其中，本发明采用溶液法制备得到的钙钛矿量子点为FAPb1‑xSnxI3量子点，其中，FA为甲脒，x≤0.11，该钙钛矿量子点具有MEG效应、高量子效率、高稳定性、可表面修饰以及可制备成膜的特点，因此，将该钙钛矿量子点作为深紫外光电探测器的光敏材料，在深紫外光下光电流达到最高117％，超过目前报道的所有溶液法制备的纳米材料光电探测器，有效提高了深紫外光电探测器的能量转换内量子效率。