Zhou Xianfang, Ge Chuangye, Liang Xiao, Wang Fei, Duan Dawei, Lin Haoran, Zhu Quanyao, Hu Hanlin
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
Hoffmann Institute of Advanced Materials, Postdoctoral Innovation Practice Base, Shenzhen Polytechnic, Nanshan District, Shenzhen 518055, China.
Molecules. 2022 Nov 4;27(21):7566. doi: 10.3390/molecules27217566.
Mixed-dimensional perovskite engineering has been demonstrated as a simple and useful approach to achieving highly efficient and more-durable perovskite solar cells (PSCs), which have attracted increasing research interests worldwide. In this work, 1D/3D mixed-dimensional perovskite has been successfully obtained by introducing DMAI via a two-step deposition method. The additive DMA can facilitate the crystalline growth and form 1D DMAPbI at grain boundaries of 3D perovskite, leading to improved morphology, longer charge carrier lifetime, and remarkably reduced bulk trap density for perovskite films. Meanwhile, the presence of low-dimension perovskite is able to prevent the intrusion of moisture, resulting in enhanced long-term stability. As a result, the PSCs incorporated with 1D DMAPbI exhibited a first-class power conversion efficiency (PCE) of 21.43% and maintained 85% of their initial efficiency after storage under ambient conditions with ~45% RH for 1000 h.
混合维度钙钛矿工程已被证明是一种实现高效且更耐用的钙钛矿太阳能电池（PSC）的简单而有效的方法，该电池在全球范围内引起了越来越多的研究兴趣。在这项工作中，通过两步沉积法引入二甲基碘化铵（DMAI）成功获得了一维/三维混合维度钙钛矿。添加剂二甲基胺（DMA）可促进晶体生长，并在三维钙钛矿的晶界处形成一维二甲基铵碘化铅（DMAPbI），从而改善了形貌，延长了电荷载流子寿命，并显著降低了钙钛矿薄膜的体陷阱密度。同时，低维度钙钛矿的存在能够防止水分侵入，从而提高长期稳定性。结果，掺入一维DMAPbI的PSC表现出21.43%的一流功率转换效率（PCE），并在相对湿度约45%的环境条件下储存1000小时后仍保持其初始效率的85%。
