Li Hua, Ding Chao, Liu Dong, Yajima Shota, Takahashi Kei, Hayase Shuzi, Shen Qing
Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610065, China.
Nanomaterials (Basel). 2023 Apr 6;13(7):1292. doi: 10.3390/nano13071292.
Methylammonium lead iodide (MAPbI) perovskite quantum dots (QDs) have become one of the most promising materials for optoelectronics. Understanding the dynamics of the charge transfer from MAPbI QDs to the charge transport layer (CTL) is critical for improving the performance of MAPbI QD photoelectronic devices. However, there is currently less consensus on this. In this study, we used an ultrafast transient absorption (TA) technique to investigate the dynamics of charge transfer from MAPbI QDs to CTL titanium dioxide (TiO), elucidating the dependence of these kinetics on QD size with an injection rate from 1.6 × 10 to 4.3 × 10 s. A QD solar cell based on MAPbI/TiO junctions with a high-power conversion efficiency (PCE) of 11.03% was fabricated, indicating its great potential for application in high-performance solar cells.
甲基碘化铅（MAPbI）钙钛矿量子点（QDs）已成为光电子学领域最具潜力的材料之一。了解电荷从MAPbI量子点转移到电荷传输层（CTL）的动力学过程对于提高MAPbI量子点光电器件的性能至关重要。然而，目前对此尚无定论。在本研究中，我们使用超快瞬态吸收（TA）技术研究了电荷从MAPbI量子点转移到CTL二氧化钛（TiO）的动力学过程，以1.6×10至4.3×10 s的注入速率阐明了这些动力学对量子点尺寸的依赖性。制备了基于MAPbI/TiO结的量子点太阳能电池，其功率转换效率（PCE）高达11.03%，表明其在高性能太阳能电池中的巨大应用潜力。
