Small-area perovskite photodiodes with an active area of 50 μm × 50 μm are achieved, showing both high specific detectivity and excellent stability. The device exhibits a low dark current density of ~ 1.6×10 -8 A/cm2 at a reverse bias of 0.1 V, a peak photoresponsivity of 1.74 A/W, and a peak specific detectivity of 1.5×10 13 Jones. Moreover, the device also shows superior photoresponse and thermal stability after continuous 1000 cycles of light switching and 400 h of thermal aging at 85 °C. The high performance is ascribed to the blocking of minority carrier injection from electrodes under a reverse bias and the high crystal quality and thermal stability of the CH3NH3(MA)-free perovskite photoactive layer.

中文翻译：

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具有高检测率和稳定性的小面积钙钛矿光电二极管


实现了有效面积为50μm×50μm的小面积钙钛矿光电二极管，表现出高比探测率和优异的稳定性。该器件在0.1 V反向偏压下表现出约1.6×10 -8 A/cm2的低暗电流密度、1.74 A/W的峰值光响应性和1.5×10 13 Jones的峰值比探测率。此外，该器件在连续1000次光开关循环和85℃下400小时热老化后还表现出优异的光响应和热稳定性。高性能归因于在反向偏压下阻挡少数载流子注入以及不含CH3NH3(MA)的钙钛矿光敏层的高晶体质量和热稳定性。