Dou Wei, Yin Ziwei, Zhang Yi, Deng Huiyong, Dai Ning
State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Nanomaterials (Basel). 2022 Jul 25;12(15):2556. doi: 10.3390/nano12152556.
Perovskite materials have been widely used to fabricate solar cells, laser diodes and other photodevices, owing to the advantage of high absorption coefficient, long carrier life and shallow defect energy levels. However, due to easy hydrolysis, it is difficult to fabricate perovskite micro-nano devices. Herein, we developed a water-free device fabrication technology and fabricated a two-dimensional (CHCHNH)PbI ((PEA)PbI) two-color blue-green light detector, which exhibits high detection performance under the illumination of two-color lasers (λ = 460 nm, 532 nm). Compared with bulk devices, the dark current of the fabricated devices (10 A) was reduced by 2 orders of magnitude. The peak responsivity and detectivity are about 1 A/W and 10 Jones, respectively. The photodetection performance of the device is basically the same under the two-color lasers. Our results provide a new process to fabricate perovskite microelectronic devices, and the fabricated photodetector shows great application prospects in underwater detection, owing to the blue-green window existing in water.
由于具有高吸收系数、长载流子寿命和浅缺陷能级等优点，钙钛矿材料已被广泛用于制造太阳能电池、激光二极管和其他光电器件。然而，由于易于水解，制造钙钛矿微纳器件存在困难。在此，我们开发了一种无水器件制造技术，并制造了一种二维(CHCHNH)PbI((PEA)PbI)双色蓝绿光探测器，该探测器在双色激光(λ = 460 nm，532 nm)照射下表现出高检测性能。与体器件相比，所制造器件的暗电流(10 A)降低了2个数量级。峰值响应度和探测率分别约为1 A/W和10 Jones。该器件在双色激光下的光电探测性能基本相同。我们的结果为制造钙钛矿微电子器件提供了一种新方法，并且由于水中存在蓝绿光窗口，所制造的光电探测器在水下探测中显示出巨大的应用前景。
