CAO group @  济南大学 (Univ Jinan)
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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!

 二维码 344

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.