CsI-Antisolvent Adduct Formation in All-Inorganic Metal Halide Perovskites

被引：59

作者：

Moot, Taylor ^{[1
]}

Marshall, Ashley R. ^{[2
]}

Wheeler, Lance M. ^{[1
]}

Habisreutinger, Severin N. ^{[1
]}

Schloemer, Tracy H. ^{[3
]}

Boyd, Caleb C. ^{[1
,4
]}

Dikova, Desislava R. ^{[1
,5
]}

Pach, Gregory F. ^{[1
]}

Hazarika, Abhijit ^{[1
]}

McGehee, Michael D. ^{[1
,6
]}

Snaith, Henry J. ^{[2
]}

Luther, Joseph M. ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

[2] Univ Oxford, Dept Phys, Oxford OX1 3PU, England

[3] Colorado Sch Mines, Dept Chem, Golden, CO 80401 USA

[4] Stanford Univ, Dept Mat Sci & Engn, Palo Alto, CA 94305 USA

[5] Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA

[6] Univ Colorado, Dept Chem & Biol Engn, Boulder, CO 80309 USA

来源：

ADVANCED ENERGY MATERIALS | 2020年 / 10卷 / 09期

基金：

美国国家科学基金会; 英国工程与自然科学研究理事会;

关键词：

acid-base complex; adduct; antisolvent; CsPbI3; perovskite; solar cells; SOLAR-CELLS; THIN-FILMS; PHASE; STABILIZATION; CRYSTALLIZATION; COORDINATION; EFFICIENCY; STABILITY; CSPBI3;

D O I：

10.1002/aenm.201903365

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The excellent optoelectronic properties demonstrated by hybrid organic/inorganic metal halide perovskites are all predicated on precisely controlling the exact nucleation and crystallization dynamics that occur during film formation. In general, high-performance thin films are obtained by a method commonly called solvent engineering (or antisolvent quench) processing. The solvent engineering method removes excess solvent, but importantly leaves behind solvent that forms chemical adducts with the lead-halide precursor salts. These adduct-based precursor phases control nucleation and the growth of the polycrystalline domains. There has not yet been a comprehensive study comparing the various antisolvents used in different perovskite compositions containing cesium. In addition, there have been no reports of solvent engineering for high efficiency in all-inorganic perovskites such as CsPbI3. In this work, inorganic perovskite composition CsPbI3 is specifically targeted and unique adducts formed between CsI and precursor solvents and antisolvents are found that have not been observed for other A-site cation salts. These CsI adducts control nucleation more so than the PbI2-dimethyl sulfoxide (DMSO) adduct and demonstrate how the A-site plays a significant role in crystallization. The use of methyl acetate (MeOAc) in this solvent engineering approach dictates crystallization through the formation of a CsI-MeOAc adduct and results in solar cells with a power conversion efficiency of 14.4%.

引用

页数：9

共 57 条

[1] Highly Reproducible Perovskite Solar Cells with Average Efficiency of 18.3% and Best Efficiency of 19.7% Fabricated via Lewis Base Adduct of Lead(II) Iodide [J].