Efficient two-dimensional CsPbI(SCN) perovskite solar cells intermediate-modulated crystallization
All-inorganic two-dimensional (2D) Cs 2 PbI 2 (SCN) 2 perovskite has a smaller layer spacing than conventional cation-induced 2D perovskite and may have potential applications in photoelectronic devices. To achieve high device efficiency, perovskite films in solar cells need high crystalline quality...
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Published in | Journal of materials chemistry. A, Materials for energy and sustainability Vol. 11; no. 1; pp. 538 - 5389 |
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Main Authors | , , , , , , |
Format | Journal Article |
Published |
07.03.2023
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Online Access | Get full text |
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Abstract | All-inorganic two-dimensional (2D) Cs
2
PbI
2
(SCN)
2
perovskite has a smaller layer spacing than conventional cation-induced 2D perovskite and may have potential applications in photoelectronic devices. To achieve high device efficiency, perovskite films in solar cells need high crystalline quality and will not react with the adjacent functional layer. In this study, Cs
2
PbI
2
(SCN)
2
perovskite films with fewer defects were fabricated through an intermediate-modulated crystallization process through the addition of formamidine hydrochloride (FACl) to the precursor. The transformation was mediated by chlorine-containing additives and proceeded
via
an intermediate phase that resulted in fewer defects in the perovskite lattice compared with the findings for Cs
2
PbI
2
(SCN)
2
prepared without the additive. A further post-treatment with phenyltrimethylammonium bromide (PTABr) avoided unfavorable direct-contact between the Cs
2
PbI
2
(SCN)
2
film and spiro-based hole transport layer. Finally, the resulting 2D Cs
2
PbI
2
(SCN)
2
based perovskite solar cells exhibited reproducible photovoltaic performance with a champion efficiency of 4.7%, which is the highest value reported to date for perovskite solar cells with such a vivid red color.
All-inorganic two-dimensional Cs
2
PbI
2
(SCN)
2
perovskite films with improved photoelectric properties were fabricated by adding FACl to precursor solutions. A champion efficiency of 4.7% was achieved in solar cells based on those films. |
---|---|
AbstractList | All-inorganic two-dimensional (2D) Cs
2
PbI
2
(SCN)
2
perovskite has a smaller layer spacing than conventional cation-induced 2D perovskite and may have potential applications in photoelectronic devices. To achieve high device efficiency, perovskite films in solar cells need high crystalline quality and will not react with the adjacent functional layer. In this study, Cs
2
PbI
2
(SCN)
2
perovskite films with fewer defects were fabricated through an intermediate-modulated crystallization process through the addition of formamidine hydrochloride (FACl) to the precursor. The transformation was mediated by chlorine-containing additives and proceeded
via
an intermediate phase that resulted in fewer defects in the perovskite lattice compared with the findings for Cs
2
PbI
2
(SCN)
2
prepared without the additive. A further post-treatment with phenyltrimethylammonium bromide (PTABr) avoided unfavorable direct-contact between the Cs
2
PbI
2
(SCN)
2
film and spiro-based hole transport layer. Finally, the resulting 2D Cs
2
PbI
2
(SCN)
2
based perovskite solar cells exhibited reproducible photovoltaic performance with a champion efficiency of 4.7%, which is the highest value reported to date for perovskite solar cells with such a vivid red color.
All-inorganic two-dimensional Cs
2
PbI
2
(SCN)
2
perovskite films with improved photoelectric properties were fabricated by adding FACl to precursor solutions. A champion efficiency of 4.7% was achieved in solar cells based on those films. |
Author | Yao, Jianxi He, Yiwu Han, Huifang Xu, Jia Wu, Qiaohui Liu, Huijing Cui, Meina |
AuthorAffiliation | North China Electric Power University Beijing Key Laboratory of Energy Safety and Clean Utilization State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources |
AuthorAffiliation_xml | – name: Beijing Key Laboratory of Energy Safety and Clean Utilization – name: North China Electric Power University – name: State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources |
Author_xml | – sequence: 1 givenname: Jia surname: Xu fullname: Xu, Jia – sequence: 2 givenname: Qiaohui surname: Wu fullname: Wu, Qiaohui – sequence: 3 givenname: Yiwu surname: He fullname: He, Yiwu – sequence: 4 givenname: Meina surname: Cui fullname: Cui, Meina – sequence: 5 givenname: Huifang surname: Han fullname: Han, Huifang – sequence: 6 givenname: Huijing surname: Liu fullname: Liu, Huijing – sequence: 7 givenname: Jianxi surname: Yao fullname: Yao, Jianxi |
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ContentType | Journal Article |
DOI | 10.1039/d2ta08625e |
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Snippet | All-inorganic two-dimensional (2D) Cs
2
PbI
2
(SCN)
2
perovskite has a smaller layer spacing than conventional cation-induced 2D perovskite and may have... |
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Title | Efficient two-dimensional CsPbI(SCN) perovskite solar cells intermediate-modulated crystallization |
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