@article{oai:oist.repo.nii.ac.jp:00002045,
 author = {You, Peng and Tang, Guanqi and Cao, Jiupeng and Shen, Dong and Ng, Tsz-Wai and Hawash, Zafer and Wang, Naixiang and Liu, Chun-Ki and Lu, Wei and Tai, Qidong and Qi, Yabing and Lee, Chun-Sing and Yan, Feng},
 issue = {1},
 journal = {Light: Science & Applications},
 month = {Mar},
 note = {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.},
 title = {2D materials for conducting holes from grain boundaries in perovskite solar cells},
 volume = {10},
 year = {2021}
}