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

作　　者：Jiang You Fei Guo Shudi Qiu Wenxin He Chuan Wang Xianhu Liu Weijian Xu Yaohua Mai 

机构地区：[1]State Key Laboratory for Chemo/Biosensing and Chemometrics,College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,Hunan,China [2]Institute of New Energy Technology,College of Information Science and Technology,Jinan University,Guangzhou 510632,Guangdong,China [3]National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450002,Henan,China

出　　处：《Journal of Energy Chemistry》2019年第11期192-198,共7页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant no. 61705090)

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, P3 HT, 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( V OC) 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.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, P3 HT, 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（ V OC） 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.

关 键 词：PEROVSKITE Non-wetting HOLE-TRANSPORT materials Surface modification Aluminum oxide 

分 类 号：TB3[一般工业技术—材料科学与工程]