晶界
钙钛矿(结构)
材料科学
粒度
晶粒生长
电子迁移率
工作(物理)
光电子学
工程物理
纳米技术
复合材料
结晶学
化学
微观结构
机械工程
物理
工程类
作者
Peng You,Gongguo Tang,Jiangwei Cao,Dong Shen,Tsz Wai Ng,Zafer Hawash,Naixiang Wang,Chun Ki Liu,Wei Lü,Qidong Tai,Yabing Qi,Chun‐Sing Lee,Feng Yan
标识
DOI:10.1038/s41377-021-00515-8
摘要
Abstract Grain boundaries in organic–inorganic halide perovskite solar cells (PSCs) have been found to be detrimental to the photovoltaic performance of devices. Here, we develop a unique approach to overcome this problem by modifying the edges of perovskite grain boundaries with flakes of high-mobility two-dimensional (2D) materials via a convenient solution process. A synergistic effect between the 2D flakes and perovskite grain boundaries is observed for the first time, which can significantly enhance the performance of PSCs. We find that the 2D flakes can conduct holes from the grain boundaries to the hole transport layers in PSCs, thereby making hole channels in the grain boundaries of the devices. Hence, 2D flakes with high carrier mobilities and short distances to grain boundaries can induce a more pronounced performance enhancement of the devices. This work presents a cost-effective strategy for improving the performance of PSCs by using high-mobility 2D materials.
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