Grain Boundary Engineering with Cl-Terminated Ti2C Quantum Dots for Enhancing Perovskite Solar Cell Performance

• DOI: 10.1021/acssuschemeng.2c07754
• Publication Date: 2023-04-27T20:07:58Z
• Authors: Zhao Luo; Yuhua Liu; Xiaoyu Zhang; Chen Wang; Shanpeng Wen; Wei Zhang; Shumin Chen; Weitao Zheng
• Keywords: Passivation; Perovskite solar cell

The power conversion efficiency and stability of polycrystalline perovskite solar cells are compromised by grain-boundary-dominated ion migration. Herein, the grain boundaries CH3NH3PbI3 films were engineered using Ti2C quantum dots. dots had a strong interaction with Pb2+ I– ions, which retarded crystal growth, resulting in larger size less boundary films. Additionally, at could anchor ions passivate defects, increasing activation energy for hopping reducing trap density. In consequence, used to fabricate significantly improved stability. These findings may allow development versatile modifiers optoelectronic devices that combine efficiency.