Reveal the growth mechanism in perovskite films via weakly coordinating solvent annealing

Yafei Wang; Detao Liu; Peng Zhang; Ting Zhang; Waseem Ahmad; Xiangxiao Ying; Feng Wang; Jian Li; Li Chen; Jiang Wu; Zhi David Chen; Shibin Li

doi:10.1007/s40843-018-9263-7

Reveal the growth mechanism in perovskite films via weakly coordinating solvent annealing

Translated title of the contribution: Reveal the growth mechanism in perovskite films via weakly coordinating solvent annealing

Yafei Wang, Detao Liu, Peng Zhang, Ting Zhang, Waseem Ahmad, Xiangxiao Ying, Feng Wang, Jian Li, Li Chen, Jiang Wu, Zhi David Chen, Shibin Li

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

In this study, we investigated the nucleation mechanism of perovskite films by employing isopropanol (IPA), a weakly coordinating solvent, to anneal both PbI₂ and CH₃NH₃PbI₃ in the sequential deposition and CsPbI₃ in the one-step deposition. IPA solvent annealing (IPA SA) of PbI₂ films was carried out at different temperatures. The grain size, compactness, roughness and morphology of PbI₂ and CH₃NH₃PbI₃ films were seriously affected by annealing methods. Similarly, weakly coordinating solvent annealing process was also employed to anneal all inorganic CsPbI₃ perovskite in a one-step method. A continuous and dense CsPbI₃ film with uniform grain size was obtained. We recognized that weakly coordinating solvent annealing for perovskite could regulate the dissolution-recrystallization process via controlling the volume of residual solvent in perovskite intermediate films. The power conversion efficiency (PCE) of conventional CH₃NH₃PbI₃ perovskite solar cells (PSCs) reached 17.4% and that of CsPbI₃ PSCs reached 2.5% based on this sequential IPA SA process.

Translated title of the contribution	Reveal the growth mechanism in perovskite films via weakly coordinating solvent annealing
Original language	English
Pages (from-to)	1536-1548
Number of pages	13
Journal	Science China Materials
Volume	61
Issue number	12
DOIs	https://doi.org/10.1007/s40843-018-9263-7
State	Published - Dec 1 2018

Bibliographical note

Publisher Copyright:
© 2018, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.

Keywords

perovskite solar cells
recrystallization
solvent annealing
weak coordinating solvent

ASJC Scopus subject areas

General Materials Science

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10.1007/s40843-018-9263-7

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title = "Reveal the growth mechanism in perovskite films via weakly coordinating solvent annealing",

abstract = "In this study, we investigated the nucleation mechanism of perovskite films by employing isopropanol (IPA), a weakly coordinating solvent, to anneal both PbI2 and CH3NH3PbI3 in the sequential deposition and CsPbI3 in the one-step deposition. IPA solvent annealing (IPA SA) of PbI2 films was carried out at different temperatures. The grain size, compactness, roughness and morphology of PbI2 and CH3NH3PbI3 films were seriously affected by annealing methods. Similarly, weakly coordinating solvent annealing process was also employed to anneal all inorganic CsPbI3 perovskite in a one-step method. A continuous and dense CsPbI3 film with uniform grain size was obtained. We recognized that weakly coordinating solvent annealing for perovskite could regulate the dissolution-recrystallization process via controlling the volume of residual solvent in perovskite intermediate films. The power conversion efficiency (PCE) of conventional CH3NH3PbI3 perovskite solar cells (PSCs) reached 17.4% and that of CsPbI3 PSCs reached 2.5% based on this sequential IPA SA process.",

keywords = "perovskite solar cells, recrystallization, solvent annealing, weak coordinating solvent",

author = "Yafei Wang and Detao Liu and Peng Zhang and Ting Zhang and Waseem Ahmad and Xiangxiao Ying and Feng Wang and Jian Li and Li Chen and Jiang Wu and Chen, {Zhi David} and Shibin Li",

note = "Publisher Copyright: {\textcopyright} 2018, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.",

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doi = "10.1007/s40843-018-9263-7",

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T1 - Reveal the growth mechanism in perovskite films via weakly coordinating solvent annealing

AU - Wang, Yafei

AU - Liu, Detao

AU - Zhang, Peng

AU - Zhang, Ting

AU - Ahmad, Waseem

AU - Ying, Xiangxiao

AU - Wang, Feng

AU - Li, Jian

AU - Chen, Li

AU - Wu, Jiang

AU - Chen, Zhi David

AU - Li, Shibin

PY - 2018/12/1

Y1 - 2018/12/1

N2 - In this study, we investigated the nucleation mechanism of perovskite films by employing isopropanol (IPA), a weakly coordinating solvent, to anneal both PbI2 and CH3NH3PbI3 in the sequential deposition and CsPbI3 in the one-step deposition. IPA solvent annealing (IPA SA) of PbI2 films was carried out at different temperatures. The grain size, compactness, roughness and morphology of PbI2 and CH3NH3PbI3 films were seriously affected by annealing methods. Similarly, weakly coordinating solvent annealing process was also employed to anneal all inorganic CsPbI3 perovskite in a one-step method. A continuous and dense CsPbI3 film with uniform grain size was obtained. We recognized that weakly coordinating solvent annealing for perovskite could regulate the dissolution-recrystallization process via controlling the volume of residual solvent in perovskite intermediate films. The power conversion efficiency (PCE) of conventional CH3NH3PbI3 perovskite solar cells (PSCs) reached 17.4% and that of CsPbI3 PSCs reached 2.5% based on this sequential IPA SA process.

AB - In this study, we investigated the nucleation mechanism of perovskite films by employing isopropanol (IPA), a weakly coordinating solvent, to anneal both PbI2 and CH3NH3PbI3 in the sequential deposition and CsPbI3 in the one-step deposition. IPA solvent annealing (IPA SA) of PbI2 films was carried out at different temperatures. The grain size, compactness, roughness and morphology of PbI2 and CH3NH3PbI3 films were seriously affected by annealing methods. Similarly, weakly coordinating solvent annealing process was also employed to anneal all inorganic CsPbI3 perovskite in a one-step method. A continuous and dense CsPbI3 film with uniform grain size was obtained. We recognized that weakly coordinating solvent annealing for perovskite could regulate the dissolution-recrystallization process via controlling the volume of residual solvent in perovskite intermediate films. The power conversion efficiency (PCE) of conventional CH3NH3PbI3 perovskite solar cells (PSCs) reached 17.4% and that of CsPbI3 PSCs reached 2.5% based on this sequential IPA SA process.

KW - perovskite solar cells

KW - recrystallization

KW - solvent annealing

KW - weak coordinating solvent

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JO - Science China Materials

JF - Science China Materials

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ER -

Reveal the growth mechanism in perovskite films via weakly coordinating solvent annealing

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