Choi Ga In, Choi Hyung Wook
Department of Electrical Engineering, Gachon University, 1342 Seongnam-daero, Seongnam-si 13120, Korea.
Nanomaterials (Basel). 2022 Mar 29;12(7):1132. doi: 10.3390/nano12071132.
Photodetectors convert optical signals into electrical signals and demonstrate application potential in various fields, such as optical communication, image detection, environmental monitoring, and optoelectronics. In this study, a mixed cation-halide perovskite-based ultraviolet C photodetector was fabricated using a solution process. The higher the mobility of the perovskite carrier, which is one of the factors affecting the performance of electronic power devices, the better the carrier diffusion. The on/off ratio and responsivity indicate the sensitivity of the response, and together with the detectivity and external quantum efficiency, these parameters demonstrate the performance of the detector. The detector fabricated in this study exhibited a mobility of 202.2 cm/Vs and a high on/off ratio of 10% at a -2 V bias, under 254 nm light irradiation with an intensity of 0.6 mW/cm. The responsivity, detectivity, and external quantum efficiency of the as-fabricated detector were 5.07 mA/W, 5.49 × 10 Jones, and 24.8%, respectively. These findings demonstrate that the solution process employed in this study is suitable for the fabrication of mixed cation-halide perovskites which show immense potential for use as photodetectors.
光电探测器将光信号转换为电信号，并在光通信、图像检测、环境监测和光电子学等各个领域展现出应用潜力。在本研究中，采用溶液法制备了一种基于混合阳离子卤化物钙钛矿的紫外C光电探测器。钙钛矿载流子迁移率是影响电子功率器件性能的因素之一，其迁移率越高，载流子扩散越好。开/关比和响应度表明响应的灵敏度，与探测率和外量子效率一起，这些参数展示了探测器的性能。在本研究中制备的探测器在-2 V偏压下，于强度为0.6 mW/cm²的254 nm光照射下，表现出202.2 cm²/Vs的迁移率和10⁵的高开/关比。所制备探测器的响应度、探测率和外量子效率分别为5.07 mA/W、5.49×10¹² Jones和24.8%。这些发现表明，本研究中采用的溶液法适用于制备混合阳离子卤化物钙钛矿，其作为光电探测器具有巨大的应用潜力。
