Institute of Optoelectronic Technology, Fuzhou University , Fuzhou 350002, People's Republic of China.
Department of Electronic Engineering, Hanyang University , Seoul 133-791, Korea.
ACS Appl Mater Interfaces. 2017 Apr 5;9(13):11662-11668. doi: 10.1021/acsami.7b01379. Epub 2017 Mar 27.
Hybrid perovskite CHNHPbI has attracted extensive research interests in optoelectronic devices in recent years. Herein an inkjet printing method has been employed to deposit a perovskite CHNHPbI layer. By choosing the proper solvent and controlling the crystal growth rate, hybrid perovskite CHNHPbI nanowires, microwires, a network, and islands were synthesized by means of inkjet printing. Electrode-gap-electrode lateral-structured photodetectors were fabricated with these different crystals, of which a hybrid perovskite microwire-based photodetector would balance the uniformity and low defects to obtain a switching ratio of 16000%, responsivity of 1.2 A/W, and normalized detectivity of 2.39 × 10 Jones at a light power density of 0.1 mW/cm. Furthermore, the hybrid perovskite microwire-based photodetector arrays were fabricated and applied in an imaging sensor, from which the clear mapping of the light source signal was successfully obtained. This work paves the way for the realization of low-cost, solution-processed, and high-performance hybrid perovskite-based photodetector arrays.
近年来，混合钙钛矿 CHNHPbI 在光电设备领域引起了广泛的研究兴趣。本文采用喷墨打印方法来沉积钙钛矿 CHNHPbI 层。通过选择合适的溶剂并控制晶体生长速率，通过喷墨打印合成了混合钙钛矿 CHNHPbI 纳米线、微米线、网络和岛状结构。使用这些不同的晶体制备了电极-间隙-电极横向结构型光电探测器，其中基于混合钙钛矿微米线的光电探测器可以平衡均匀性和低缺陷，从而获得 16000%的开关比、1.2 A/W 的响应率和归一化探测率为 2.39×10 琼斯，在光功率密度为 0.1 mW/cm 时。此外，还制备了基于混合钙钛矿微米线的光电探测器阵列，并将其应用于成像传感器，成功获得了光源信号的清晰成像。这项工作为实现低成本、溶液处理和高性能的基于混合钙钛矿的光电探测器阵列铺平了道路。
