Liu Xiao, Geng Xiangshun, Dun Guanhua, Wang Zeshu, Du Jingbo, Xie Dan, Yang Yi, Ren Tianling
The Beijing National Research Center for Information Science and Technology (BNRist), School of Integrated Circuits, Tsinghua University, Beijing 100084, China.
Materials (Basel). 2024 May 28;17(11):2599. doi: 10.3390/ma17112599.
Recently, the combination of two-dimensional (2D) materials and perovskites has gained increasing attention in optoelectronic applications owing to their excellent optical and electrical characteristics. Here, we report a self-driven photodetector consisting of a monolayer graphene sheet and a centimeter-sized CHNHPbBr single crystal, which was prepared using an optimized wet transfer method. The photodetector exhibits a short response time of 2/30 μs by virtue of its high-quality interface, which greatly enhances electron-hole pair separation in the heterostructure under illumination. In addition, a responsivity of ~0.9 mA/W and a detectivity over 10 Jones are attained at zero bias. This work inspires new methods for preparing large-scale high-quality perovskite/2D material heterostructures, and provides a new direction for the future enhancement of perovskite optoelectronics.
最近，二维（2D）材料与钙钛矿的结合因其优异的光学和电学特性而在光电子应用中受到越来越多的关注。在此，我们报道了一种由单层石墨烯片和厘米级CHNHPbBr单晶组成的自驱动光电探测器，该单晶是使用优化的湿法转移方法制备的。由于其高质量的界面，该光电探测器表现出2/30 μs的短响应时间，这大大增强了光照下异质结构中电子-空穴对的分离。此外，在零偏压下实现了约0.9 mA/W的响应度和超过10 Jones的探测率。这项工作启发了制备大规模高质量钙钛矿/二维材料异质结构的新方法，并为未来钙钛矿光电子学的增强提供了新方向。
