Manipulate energy transport via fluorinated spacers towards record-efficiency 2D Dion-Jacobson CsPbI3 solar cells

Yutian  Lei; Zhen-Hua  Li; Haoxu Wang; Qian Wang; Guoqiang  Peng; Youkui  Xu; Haihua  Zhang; Gang Wang; Liming  Ding; Zhiwen  Jin

doi:10.1016/j.scib.2022.05.019

Manipulate energy transport via fluorinated spacers towards record-efficiency 2D Dion-Jacobson CsPbI₃ solar cells

Yutian Lei, Zhen-Hua Li, Haoxu Wang, Qian Wang, Guoqiang Peng, Youkui Xu, Haihua Zhang, Gang Wang, Liming Ding, Zhiwen Jin

Photovoltaic Materials and Devices

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

6 Citations (Scopus)

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Abstract

Two-dimensional (2D) Dion-Jacobson (D-J)-type cesium lead iodide CsPbI ₃ perform remarkably in terms of stability. However, the complex interactions between spacer and inorganic layers limit its excellent progress in perovskite solar cells (PSCs). Herein, starting from the considerable structural diversity of organic spacers, we engineer 2D CsPbI ₃ with fine-tuning functionalities. Specifically, for the first time we embedded fluorinated aromatic cations in 2D D-J CsPbI ₃, and successfully applied it into construction of high-performance PSCs. Compared with constitutive 1,4-diaminobenzene (PDA), the fluorinated 2-fluorobenzene-1,4-diamine (F-PDA) component greatly expands the dipole moment from 0.59D to 3.47D, which reduces the exciton binding energy of the system. A theoretical study shows that the spacer layer and inorganic plane are more enriched with charge accumulation in (F-PDA)Cs _n– ₁Pb _nI ₃ _n+ ₁. The results show that (F-PDA)Cs _n– ₁Pb _nI ₃ _n+ ₁ demonstrates more significant charge transfer between organic and inorganic layers than (PDA)Cs _n– ₁Pb _nI ₃ _n+ ₁, and it is confirmed in the femtosecond transient absorption experiment. Moreover, the interactions of the fluorinated spacer with the [PbI ₆] ⁴ ^– plane effectively manipulate the crystallization quality, and thus the ion migration and defect formation of target 2D CsPbI ₃ are inhibited. As a result, we obtained a record power conversion efficiency (PCE) beyond 15% for 2D D-J (F-PDA)Cs ₃Pb ₄I ₁₃ (n = 4) PSCs with significantly improved environmental stability compared with the three-dimensional (3D) counterparts.

Original language	English
Pages (from-to)	1352–1361
Number of pages	10
Journal	Science Bulletin
Volume	67
Issue number	13
DOIs	https://doi.org/10.1016/j.scib.2022.05.019
Publication status	Published - 2022

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

Dion-Jacobson CsPbI
Energy transport
Fluorinated spacers
Interaction

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10.1016/j.scib.2022.05.019

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Cite this

@article{0ee8aacc17f94192b75b7ddd38385a19,

title = "Manipulate energy transport via fluorinated spacers towards record-efficiency 2D Dion-Jacobson CsPbI3 solar cells",

abstract = "Two-dimensional (2D) Dion-Jacobson (D-J)-type cesium lead iodide CsPbI 3 perform remarkably in terms of stability. However, the complex interactions between spacer and inorganic layers limit its excellent progress in perovskite solar cells (PSCs). Herein, starting from the considerable structural diversity of organic spacers, we engineer 2D CsPbI 3 with fine-tuning functionalities. Specifically, for the first time we embedded fluorinated aromatic cations in 2D D-J CsPbI 3, and successfully applied it into construction of high-performance PSCs. Compared with constitutive 1,4-diaminobenzene (PDA), the fluorinated 2-fluorobenzene-1,4-diamine (F-PDA) component greatly expands the dipole moment from 0.59D to 3.47D, which reduces the exciton binding energy of the system. A theoretical study shows that the spacer layer and inorganic plane are more enriched with charge accumulation in (F-PDA)Cs n– 1Pb nI 3 n+ 1. The results show that (F-PDA)Cs n– 1Pb nI 3 n+ 1 demonstrates more significant charge transfer between organic and inorganic layers than (PDA)Cs n– 1Pb nI 3 n+ 1, and it is confirmed in the femtosecond transient absorption experiment. Moreover, the interactions of the fluorinated spacer with the [PbI 6] 4 – plane effectively manipulate the crystallization quality, and thus the ion migration and defect formation of target 2D CsPbI 3 are inhibited. As a result, we obtained a record power conversion efficiency (PCE) beyond 15% for 2D D-J (F-PDA)Cs 3Pb 4I 13 (n = 4) PSCs with significantly improved environmental stability compared with the three-dimensional (3D) counterparts. ",

keywords = "Dion-Jacobson CsPbI, Energy transport, Fluorinated spacers, Interaction",

author = "Yutian Lei and Zhen-Hua Li and Haoxu Wang and Qian Wang and Guoqiang Peng and Youkui Xu and Haihua Zhang and Gang Wang and Liming Ding and Zhiwen Jin",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. ",

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volume = "67",

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Manipulate energy transport via fluorinated spacers towards record-efficiency 2D Dion-Jacobson CsPbI₃ solar cells. / Lei, Yutian ; Li, Zhen-Hua ; Wang, Haoxu; Wang, Qian; Peng, Guoqiang ; Xu, Youkui ; Zhang, Haihua ; Wang, Gang; Ding, Liming ; Jin, Zhiwen .

In: Science Bulletin, Vol. 67, No. 13, 2022, p. 1352–1361.

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

TY - JOUR

T1 - Manipulate energy transport via fluorinated spacers towards record-efficiency 2D Dion-Jacobson CsPbI3 solar cells

AU - Lei, Yutian

AU - Li, Zhen-Hua

AU - Wang, Haoxu

AU - Wang, Qian

AU - Peng, Guoqiang

AU - Xu, Youkui

AU - Zhang, Haihua

AU - Wang, Gang

AU - Ding, Liming

AU - Jin, Zhiwen

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2022

Y1 - 2022

N2 - Two-dimensional (2D) Dion-Jacobson (D-J)-type cesium lead iodide CsPbI 3 perform remarkably in terms of stability. However, the complex interactions between spacer and inorganic layers limit its excellent progress in perovskite solar cells (PSCs). Herein, starting from the considerable structural diversity of organic spacers, we engineer 2D CsPbI 3 with fine-tuning functionalities. Specifically, for the first time we embedded fluorinated aromatic cations in 2D D-J CsPbI 3, and successfully applied it into construction of high-performance PSCs. Compared with constitutive 1,4-diaminobenzene (PDA), the fluorinated 2-fluorobenzene-1,4-diamine (F-PDA) component greatly expands the dipole moment from 0.59D to 3.47D, which reduces the exciton binding energy of the system. A theoretical study shows that the spacer layer and inorganic plane are more enriched with charge accumulation in (F-PDA)Cs n– 1Pb nI 3 n+ 1. The results show that (F-PDA)Cs n– 1Pb nI 3 n+ 1 demonstrates more significant charge transfer between organic and inorganic layers than (PDA)Cs n– 1Pb nI 3 n+ 1, and it is confirmed in the femtosecond transient absorption experiment. Moreover, the interactions of the fluorinated spacer with the [PbI 6] 4 – plane effectively manipulate the crystallization quality, and thus the ion migration and defect formation of target 2D CsPbI 3 are inhibited. As a result, we obtained a record power conversion efficiency (PCE) beyond 15% for 2D D-J (F-PDA)Cs 3Pb 4I 13 (n = 4) PSCs with significantly improved environmental stability compared with the three-dimensional (3D) counterparts.

AB - Two-dimensional (2D) Dion-Jacobson (D-J)-type cesium lead iodide CsPbI 3 perform remarkably in terms of stability. However, the complex interactions between spacer and inorganic layers limit its excellent progress in perovskite solar cells (PSCs). Herein, starting from the considerable structural diversity of organic spacers, we engineer 2D CsPbI 3 with fine-tuning functionalities. Specifically, for the first time we embedded fluorinated aromatic cations in 2D D-J CsPbI 3, and successfully applied it into construction of high-performance PSCs. Compared with constitutive 1,4-diaminobenzene (PDA), the fluorinated 2-fluorobenzene-1,4-diamine (F-PDA) component greatly expands the dipole moment from 0.59D to 3.47D, which reduces the exciton binding energy of the system. A theoretical study shows that the spacer layer and inorganic plane are more enriched with charge accumulation in (F-PDA)Cs n– 1Pb nI 3 n+ 1. The results show that (F-PDA)Cs n– 1Pb nI 3 n+ 1 demonstrates more significant charge transfer between organic and inorganic layers than (PDA)Cs n– 1Pb nI 3 n+ 1, and it is confirmed in the femtosecond transient absorption experiment. Moreover, the interactions of the fluorinated spacer with the [PbI 6] 4 – plane effectively manipulate the crystallization quality, and thus the ion migration and defect formation of target 2D CsPbI 3 are inhibited. As a result, we obtained a record power conversion efficiency (PCE) beyond 15% for 2D D-J (F-PDA)Cs 3Pb 4I 13 (n = 4) PSCs with significantly improved environmental stability compared with the three-dimensional (3D) counterparts.

KW - Dion-Jacobson CsPbI

KW - Energy transport

KW - Fluorinated spacers

KW - Interaction

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