Shin Seong Gwan, Bark Chung Wung, Choi Hyung Wook
Department of Electrical Engineering, Gachon University, 1342 Seongnam Daero, Seongnam-Si 13120, Korea.
Nanomaterials (Basel). 2021 Apr 13;11(4):1000. doi: 10.3390/nano11041000.
In this study, a simply structured perovskite-based ultraviolet C (UVC) sensor was prepared using a one-step, low-temperature solution-processing coating method. The UVC sensor utilized CHNHPbBr perovskite as the light-absorbing layer. To improve the characteristics of CHNHPbBr, an antisolvent process using toluene and the addition of CHNHCl were introduced. The device with these modifications exhibited a response rise/fall time of 15.8/16.2 ms, mobility of 158.7 cm/V·s, responsivity of 4.57 mA/W, detectivity of 1.02 × 10 Jones, and external quantum efficiency of 22.32% under the 254-nm UV illumination. Therefore, this methodology could be a good approach in facilitating UVC detection.
在本研究中，采用一步低温溶液处理涂层法制备了一种结构简单的钙钛矿基紫外C（UVC）传感器。该UVC传感器利用CHNHPbBr钙钛矿作为光吸收层。为了改善CHNHPbBr的特性，引入了使用甲苯的反溶剂工艺和CHNHCl的添加。经过这些改进的器件在254nm紫外光照下的响应上升/下降时间为15.8/16.2ms，迁移率为158.7cm²/V·s，响应度为4.57mA/W，探测率为1.02×10 Jones，外量子效率为22.32%。因此，这种方法可能是促进UVC检测的一种好方法。
