Crystal Growth Regulation of Ruddlesden-Popper Perovskites via Self-Assembly of Semiconductor Spacers for Efficient Solar Cells
By
Chen, MQ (Chen, Mingqian) [1] , [2] , [3] ; Dong, XY (Dong, Xiyue) [1] , [2] ; Xin, YF (Xin, Yufei) [1] , [2] ; Gao, YP (Gao, Yuping) [1] , [2] ; Fu, Q (Fu, Qiang) [1] , [2] , [3] ; Wang, R (Wang, Rui) [1] , [2] ; Xu, ZY (Xu, Zhiyuan) [1] , [2] ; Chen, Y (Chen, Yu) [4] ; Liu, YS (Liu, Yongsheng) [1] , [2] , [5]
(provided by Clarivate)
Early Access
DEC 2023
Indexed
2023-12-28
Document Type
Article; Early Access
Abstract
The crystal growth and orientation of two-dimensional (2D) perovskite films significantly impact solar cell performance. Here, we incorporated robust quadrupole-quadrupole interactions to govern the crystal growth of 2D Ruddlesden-Popper (RP) perovskites. This was achieved through the development of two unique semiconductor spacers, namely PTMA and 5FPTMA, with different dipole moments. The ((5FPTMA)0.1(PTMA)0.9)2MAn-1PbnI3n+1 (nominal n=5, 5F/PTMA-Pb) film shows a preferred vertical orientation, reduced grain boundaries, and released residual strain compared to (PTMA)2MAn-1PbnI3n+1 (nominal n=5, PTMA-Pb), resulting in a decreased exciton binding energy and reduced electron-phonon coupling coefficients. In contrast to PTMA-Pb device with an efficiency of 15.66 %, the 5F/PTMA-Pb device achieved a champion efficiency of 18.56 %, making it among the best efficiency for 2D RP perovskite solar cells employing an MA-based semiconductor spacer. This work offers significant insights into comprehending the crystal growth process of 2D RP perovskite films through the utilization of quadrupole-quadrupole interactions between semiconductor spacers.
We incorporated robust quadrupole-quadrupole interactions to regulate the crystal growth of 2D Ruddlesden-Popper (RP) perovskites. This was achieved through the development of two unique semiconductor spacers, namely PTMA and 5FPTMA, with different dipole moments. Devices utilizing films incorporating these interactions exhibited a significant efficiency enhancement, increasing from 15.66 % to 18.56 %.
