Gao Yuping, Dong Xiyue, Liu Yongsheng
The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, People's Republic of China.
Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin, 300071, People's Republic of China.
Nanomicro Lett. 2023 Jul 5;15(1):169. doi: 10.1007/s40820-023-01141-2.
Layered two dimensional (2D) or quasi-2D perovskites are emerging photovoltaic materials due to their superior environment and structure stability in comparison with their 3D counterparts. The typical 2D perovskites can be obtained by cutting 3D perovskites along < 100 > orientation by incorporation of bulky organic spacers, which play a key role in the performance of 2D perovskite solar cells (PSCs). Compared with aliphatic spacers, aromatic spacers with high dielectric constant have the potential to decrease the dielectric and quantum confinement effect of 2D perovskites, promote efficient charge transport and reduce the exciton binding energy, all of which are beneficial for the photovoltaic performance of 2D PSCs. In this review, we aim to provide useful guidelines for the design of aromatic spacers for 2D perovskites. We systematically reviewed the recent progress of aromatic spacers used in 2D PSCs. Finally, we propose the possible design strategies for aromatic spacers that may lead to more efficient and stable 2D PSCs.
层状二维（2D）或准二维钙钛矿作为新兴的光伏材料，与三维钙钛矿相比，具有更优异的环境和结构稳定性。典型的二维钙钛矿可通过引入大体积有机间隔基团沿<100>方向切割三维钙钛矿获得，这些间隔基团在二维钙钛矿太阳能电池（PSC）的性能中起着关键作用。与脂肪族间隔基团相比，具有高介电常数的芳香族间隔基团有潜力降低二维钙钛矿的介电和量子限制效应，促进高效电荷传输并降低激子结合能，所有这些都有利于二维PSC的光伏性能。在本综述中，我们旨在为二维钙钛矿芳香族间隔基团的设计提供有用的指导方针。我们系统地回顾了二维PSC中使用的芳香族间隔基团的最新进展。最后，我们提出了可能的芳香族间隔基团设计策略，这可能会带来更高效、稳定的二维PSC。
