Discovery of a New Intermediate Enables One-Step Deposition of High-Quality Perovskite Films via Solvent Engineering

被引：28

作者：

Hu, Chen ^{[1
]}

Shivarudraiah, Sunil B. ^{[1
]}

Sung, Herman H. Y. ^{[1
]}

Williams, Ian D. ^{[1
]}

Halpert, Jonathan E. ^{[1
]}

Yang, Shihe ^{[1
,2
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Clear Water Bay, Hong Kong, Peoples R China

[2] Peking Univ, Shenzhen Grad Sch, Sch Chem Biol & Biotechnol, Guangdong Prov Key Lab Nanomicro Mat Res, Shenzhen 518055, Peoples R China

来源：

SOLAR RRL | 2021年 / 5卷 / 04期

关键词：

film formations; intermediates; perovskite solar cells; SOLAR-CELLS; EFFICIENT;

D O I：

10.1002/solr.202000712

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Bromide-based organo-metal halide perovskites have shown great potential for use in tandem solar cells (SCs), light-emitting diodes (LEDs), and photodetectors. Herein, a new protocol using a one-step deposition method for producing formamidinium lead bromide (FAPbBr(3)) perovskites is reported, which features a solvent-engineered intermediate phase to achieve superior films. For the first time, a FABr-PbBr2-DMSO intermediate is identified and single crystals of the same intermediate compound are synthesized. A systematic investigation of phase evolution in the film formation process reveals that DMSO enables crystallization of the FABr-PbBr2-DMSO intermediate and thus modulates the crystallization process of FAPbBr(3) perovskite, achieving uniform, smooth films with Volmer-Weber morphology. To prevent hole leakage arising from the larger bandgap of FAPbBr(3) than FAPbI(3), an additional layer of Mg-doped ZnO nanoparticles is added. As a result, inverted SCs using these solvent engineered films achieve power conversion efficiencies (PCEs) of up to 9.06%, the highest reported efficiency for inverted FAPbBr(3) perovskite devices.

引用

页数：9