Inorganic CsPbI2Br perovskites solar cells (PSCs) have attracted extensive interest owing to their outstanding optoelectronic properties. Nevertheless, the undesirable perovskite film quality and severe charge recombination dramatically restrict their performance improvement. Herein, we propose an additive strategy to modulate the CsPbI2Br crystallization process and reduce the defect density by adding 3-(1-pyridinio)-1-propanesulfonate (PPS) zwitterionic molecules into the perovskite precursor solution. The incorporation of PPS zwitterion can not only retard the crystal growth rate of CsPbI2Br with uniform morphology and enlarged grain size, but also effectively passivate defects via interacting with the uncoordinated sites in the perovskite film. In addition, the PPS zwitterion greatly ameliorates the energy level alignments at the interface. Thus, the photogenerated carriers are more efficiently extracted, and the nonradiative recombination is significantly suppressed. With these benefits, the optimized PPS-based CsPbI2Br device delivers a champion efficiency of 16.37% with high open-circuit voltage (VOC) of 1.302 V in contrast to the pristine device with an inferior efficiency of 14.26% (VOC of 1.183 V). In addition, the unencapsulated device with PPS presents improved long-term stability by preserving ∼85% of the initial efficiency after 760 h storage in ambient atmosphere. These findings provided important insights into the additive strategy of using zwitterionic materials for constructing efficient and stable inorganic PSCs.
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16 December 2024
Research Article|
December 18 2024
Zwitterion additive-assisted crystal growth regulation and defect passivation for high-performance inorganic perovskite solar cells
Zelin Xu
;
Zelin Xu
(Data curation, Investigation, Writing – original draft)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Hong Jiang
;
Hong Jiang
(Investigation, Methodology)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Xiu Huang;
Xiu Huang
(Data curation, Formal analysis)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Xiang Gao;
Xiang Gao
(Data curation, Investigation)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Yuhang Ma
;
Yuhang Ma
(Investigation, Methodology)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Siqi Sun
;
Siqi Sun
(Investigation, Methodology)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Ziqi Zhao
;
Ziqi Zhao
(Funding acquisition, Methodology)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Jing Zhang
;
Jing Zhang
(Resources, Supervision)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Like Huang
;
Like Huang
(Resources, Supervision)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Ziyang Hu
;
Ziyang Hu
(Funding acquisition, Resources)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Hongxing He
;
Hongxing He
a)
(Conceptualization, Project administration, Writing – review & editing)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Yuejin Zhu
;
Yuejin Zhu
(Funding acquisition, Supervision)
2
School of Information Engineering, College of Science and Technology, Ningbo University
, Ningbo 315300, China
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Xiaohui Liu
Xiaohui Liu
a)
(Conceptualization, Funding acquisition, Project administration, Supervision, Writing – original draft, Writing – review & editing)
1
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University
, Ningbo 315211, China
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Appl. Phys. Lett. 125, 252108 (2024)
Article history
Received:
September 13 2024
Accepted:
December 10 2024
Citation
Zelin Xu, Hong Jiang, Xiu Huang, Xiang Gao, Yuhang Ma, Siqi Sun, Ziqi Zhao, Jing Zhang, Like Huang, Ziyang Hu, Hongxing He, Yuejin Zhu, Xiaohui Liu; Zwitterion additive-assisted crystal growth regulation and defect passivation for high-performance inorganic perovskite solar cells. Appl. Phys. Lett. 16 December 2024; 125 (25): 252108. https://doi.org/10.1063/5.0238732
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