The fabrication of homogeneous perovskite films on non-wetting interfaces enabled by physical modification

• 作者: Chuan Wang Fei Guo Jiang You Shudi Qiu Weijian Xu Wenxin He Xianhu Liu Yaohua Mai
• 来源期刊: 能源化学
• 年，卷（期）: 2019,（11）
• 页码范围: 192-198
• 页数: 7页
• 语种: 英文

摘要

Conjugated polymers are commonly used as effective hole transport materials (HTMs) for preparation of high-performance perovskite solar cells.However,the hydrophobic nature of these materials renders it difficult to deposit photovoltaic perovskite layers on top via solution processing.In this article,we report a generic surface modification strategy that enables the deposition of uniform and dense perovskite films on top of non-wetting interfaces.In contrast to the previous proposed chemical modifications which might alter the optoelectronic properties of the interfacial layers,we realized a nondestructive surface modification enabled by introducing a layer of insulating mesoporous aluminum oxide (Al2O3).The surface energies of the typical non-wetting hole-transport layers (PTAA,P3HT,and Poly-TPD) were significantly reduced by the Al2O3 modification.Benefiting from the intact optoelectronic properties of the HTMs,perovskite solar cells deposited on these interface materials show full open-circuit voltages (Voc) with high fill factors (FF) up to 80％.Our method provides an effective avenue for exploiting the full potential of the existing as well as newly developed non-wetting interface materials for the fabrication of high-performance inverted perovskite solar cells.