Affiliation:
1. 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 China
2. Department of Materials Science and Engineering City University of Hong Kong Kowloon, Hong Kong 999077 China
3. The Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China
4. Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China
Abstract
AbstractThe 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.
Funder
National Natural Science Foundation of China
Ministry of Science and Technology of the People's Republic of China
Natural Science Foundation of Hebei Province
Subject
General Chemistry,Catalysis
Cited by
11 articles.
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