Effect of Precursor Aging on Built-In Potential in Formamidinium-Based Perovskite Solar Cells

Linfeng Cai; Yiwen Wang; Ning Li; Ali Asgher Syed; Fu Rong Zhu

doi:10.1002/ente.202000192

Effect of Precursor Aging on Built-In Potential in Formamidinium-Based Perovskite Solar Cells

Linfeng Cai, Yiwen Wang, Ning Li, Ali Asgher Syed, Fu Rong Zhu^*

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › peer-review

9 Citations (Scopus)

Abstract

Formamidinium-based perovskite with optimal bandgap and improved thermal stability is a promising active material for application in perovskite solar cells (PSCs). The hybrid precursor solutions, formed by adding various smaller cations, are often used for improving the phase stability in PSCs. Herein, research to understand the aging effect of a methylammonium- and bromine-free formamidinium precursor solution on the performance of FA_0.85Cs_0.1Rb_0.05PbI₃-based PSCs is reported. The results reveal that deterioration in the built-in potential in the PSCs is closely associated with the formation of the secondary phase in the FA_0.85Cs_0.1Rb_0.05PbI₃ active layer. The formation of the secondary phase in the active layer is related to the hydrolysis of the precursor solution. The suppression of the moisture encroachment greatly enhances the durability of the precursor solution and performance reproducibility of PSCs.

Original language	English
Article number	2000192
Journal	Energy Technology
Volume	8
Issue number	12
Early online date	7 Apr 2020
DOIs	https://doi.org/10.1002/ente.202000192
Publication status	Published - Dec 2020

Scopus Subject Areas

General Energy

User-Defined Keywords

built-in potentials
perovskite solar cells
precursor solution aging
secondary phases

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/ente.202000192

Cite this

@article{97069edacb844534aa08c92eae7fd926,

title = "Effect of Precursor Aging on Built-In Potential in Formamidinium-Based Perovskite Solar Cells",

abstract = "Formamidinium-based perovskite with optimal bandgap and improved thermal stability is a promising active material for application in perovskite solar cells (PSCs). The hybrid precursor solutions, formed by adding various smaller cations, are often used for improving the phase stability in PSCs. Herein, research to understand the aging effect of a methylammonium- and bromine-free formamidinium precursor solution on the performance of FA0.85Cs0.1Rb0.05PbI3-based PSCs is reported. The results reveal that deterioration in the built-in potential in the PSCs is closely associated with the formation of the secondary phase in the FA0.85Cs0.1Rb0.05PbI3 active layer. The formation of the secondary phase in the active layer is related to the hydrolysis of the precursor solution. The suppression of the moisture encroachment greatly enhances the durability of the precursor solution and performance reproducibility of PSCs.",

keywords = "built-in potentials, perovskite solar cells, precursor solution aging, secondary phases",

author = "Linfeng Cai and Yiwen Wang and Ning Li and Syed, {Ali Asgher} and Zhu, {Fu Rong}",

note = "Funding Information: This work was financially supported by the Research Grants Council of Hong Kong Special Administrative Region, China, General Research Fund (12303114), Collaborative Research Fund (C5037-18GF), and Hong Kong Baptist University Inter-institutional Research Scheme (RC-ICRS/15-16/04).",

year = "2020",

month = dec,

doi = "10.1002/ente.202000192",

language = "English",

volume = "8",

journal = "Energy Technology",

issn = "2194-4288",

publisher = "Wiley - VCH Verlag GmbH & CO. KGaA",

number = "12",

}

TY - JOUR

T1 - Effect of Precursor Aging on Built-In Potential in Formamidinium-Based Perovskite Solar Cells

AU - Cai, Linfeng

AU - Wang, Yiwen

AU - Li, Ning

AU - Syed, Ali Asgher

AU - Zhu, Fu Rong

N1 - Funding Information: This work was financially supported by the Research Grants Council of Hong Kong Special Administrative Region, China, General Research Fund (12303114), Collaborative Research Fund (C5037-18GF), and Hong Kong Baptist University Inter-institutional Research Scheme (RC-ICRS/15-16/04).

PY - 2020/12

Y1 - 2020/12

N2 - Formamidinium-based perovskite with optimal bandgap and improved thermal stability is a promising active material for application in perovskite solar cells (PSCs). The hybrid precursor solutions, formed by adding various smaller cations, are often used for improving the phase stability in PSCs. Herein, research to understand the aging effect of a methylammonium- and bromine-free formamidinium precursor solution on the performance of FA0.85Cs0.1Rb0.05PbI3-based PSCs is reported. The results reveal that deterioration in the built-in potential in the PSCs is closely associated with the formation of the secondary phase in the FA0.85Cs0.1Rb0.05PbI3 active layer. The formation of the secondary phase in the active layer is related to the hydrolysis of the precursor solution. The suppression of the moisture encroachment greatly enhances the durability of the precursor solution and performance reproducibility of PSCs.

AB - Formamidinium-based perovskite with optimal bandgap and improved thermal stability is a promising active material for application in perovskite solar cells (PSCs). The hybrid precursor solutions, formed by adding various smaller cations, are often used for improving the phase stability in PSCs. Herein, research to understand the aging effect of a methylammonium- and bromine-free formamidinium precursor solution on the performance of FA0.85Cs0.1Rb0.05PbI3-based PSCs is reported. The results reveal that deterioration in the built-in potential in the PSCs is closely associated with the formation of the secondary phase in the FA0.85Cs0.1Rb0.05PbI3 active layer. The formation of the secondary phase in the active layer is related to the hydrolysis of the precursor solution. The suppression of the moisture encroachment greatly enhances the durability of the precursor solution and performance reproducibility of PSCs.

KW - built-in potentials

KW - perovskite solar cells

KW - precursor solution aging

KW - secondary phases

UR - http://www.scopus.com/inward/record.url?scp=85083676269&partnerID=8YFLogxK

U2 - 10.1002/ente.202000192

DO - 10.1002/ente.202000192

M3 - Journal article

AN - SCOPUS:85083676269

SN - 2194-4288

VL - 8

JO - Energy Technology

JF - Energy Technology

IS - 12

M1 - 2000192

ER -

Effect of Precursor Aging on Built-In Potential in Formamidinium-Based Perovskite Solar Cells

Abstract

Scopus Subject Areas

User-Defined Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this