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

Abstract

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 cellsmore » with a power conversion efficiency of 14.4%.« less

Authors:
 [1];  [2]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1];  [1];  [1];  [3];  [2]; ORCiD logo [1]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. Oxford University
  3. University of Colorado
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
U.S. Department of Defense (DOD); USDOE National Renewable Energy Laboratory (NREL), Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B); USDOE Office of Science (SC), Office of Workforce Development for Teachers and Scientists, Science Undergraduate Laboratory Internship (SULI) Program
OSTI Identifier:
1598483
Report Number(s):
NREL/JA-5900-75166
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Name: Advanced Energy Materials
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; acid-base complex; adduct antisolvent; CsPbI3; perovskite; solar cells

Citation Formats

Moot, Taylor, Marshall, Ashley R., Wheeler, Lance M, Habisreutinger, Severin N, Schloemer, Tracy, Boyd, Caleb, Dikova, Desislava, Pach, Gregory, Hazarika, Abhijit, McGehee, Michael D., Snaith, Henry J., and Luther, Joseph M. CsI-Antisolvent Adduct Formation in All-Inorganic Metal Halide Perovskites. United States: N. p., 2020. Web. doi:10.1002/aenm.201903365.
Moot, Taylor, Marshall, Ashley R., Wheeler, Lance M, Habisreutinger, Severin N, Schloemer, Tracy, Boyd, Caleb, Dikova, Desislava, Pach, Gregory, Hazarika, Abhijit, McGehee, Michael D., Snaith, Henry J., & Luther, Joseph M. CsI-Antisolvent Adduct Formation in All-Inorganic Metal Halide Perovskites. United States. doi:10.1002/aenm.201903365.
Moot, Taylor, Marshall, Ashley R., Wheeler, Lance M, Habisreutinger, Severin N, Schloemer, Tracy, Boyd, Caleb, Dikova, Desislava, Pach, Gregory, Hazarika, Abhijit, McGehee, Michael D., Snaith, Henry J., and Luther, Joseph M. Fri . "CsI-Antisolvent Adduct Formation in All-Inorganic Metal Halide Perovskites". United States. doi:10.1002/aenm.201903365.
@article{osti_1598483,
title = {CsI-Antisolvent Adduct Formation in All-Inorganic Metal Halide Perovskites},
author = {Moot, Taylor and Marshall, Ashley R. and Wheeler, Lance M and Habisreutinger, Severin N and Schloemer, Tracy and Boyd, Caleb and Dikova, Desislava and Pach, Gregory and Hazarika, Abhijit and McGehee, Michael D. and Snaith, Henry J. and Luther, Joseph M},
abstractNote = {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%.},
doi = {10.1002/aenm.201903365},
journal = {Advanced Energy Materials},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {1}
}

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