祝贺苑帅同学关于钙钛矿电池溶剂分子辅助生长方面的工作被ACS Appl Mater Interface接收！

High-qualityPerovskite Films Grown with a Fast Solvent-assistedMolecule Inserting Strategy for Highly Efficient and Stable Solar Cells

ShuaiYuan,^† Zhiwen Qiu,^† Chaomin Gao,^‡ HailiangZhang,^† Yanan Jiang,^† Cuncheng Li,^‡ Jinghua Yu,^‡ Bingqiang Cao^†*

Materials Research Center for Energy and Photoelectrochemical Conversion,    ^†School of Material Scienceand Engineering, ^‡Schoolof Chemistry and Chemical Engineering, University of Jinan, Jinan 250022,Shandong, China

*E-mail: mse_caobq@ujn.edu.cn

Abstract

The performance oforganolead halide perovskites based solar cells has been enhanced dramaticallydue to the morphology control of the perovskite films. In this paper, we present a fast solvent-assisted molecule inserting (S-AMI) strategy to grow high-quality perovskite film, in which themethylammonium iodide/2-propanol (MAI/IPA) solution is spin-coated onto adimethylformamide (DMF) wetted mixed lead halide (PbX₂) precursor film. TheDMF can help the inserting of MAI molecules into the PbX₂precursor film andprovide a solvent environment to help the grain growth of the perovskite film.The perovskite film grown by S-AMI approach shows large and well-oriented grainsand long carrier lifetime due to the reduced grain boundary. Solar cellsconstructed with these perovskite films yield an average efficiency over 17%along with a high average fill factor of 80%. Moreover, these unsealed solarcell devices exhibit good stability in ambient atmosphere.