Hydrogen-bond-bridged intermediate for perovskite solar cells with enhanced efficiency and stability

Fengzhu LI; Xiang DENG; Zhangsheng SHI; Shengfan WU; Zixin ZENG; Deng WANG; Yang LI; Feng QI; Zhuomin ZHANG; Zhengbao YANG; Sei Hum JANG; Francis R. LIN; Sai‐Wing TSANG; Xian Kai CHEN; Alex K.Y. JEN

doi:10.1038/s41566-023-01180-6

Hydrogen-bond-bridged intermediate for perovskite solar cells with enhanced efficiency and stability

Fengzhu LI, Xiang DENG, Zhangsheng SHI, Shengfan WU, Zixin ZENG, Deng WANG, Yang LI, Feng QI, Zhuomin ZHANG, Zhengbao YANG, Sei Hum JANG, Francis R. LIN, Sai‐Wing TSANG, Xian Kai CHEN, Alex K.Y. JEN^*

^*Corresponding author for this work

Research output: Journal Publications › Journal Article (refereed) › peer-review

166 Citations (Scopus)

Abstract

Improving the intrinsic film quality of metal halide perovskites is very critical to increase the power conversion efficiency and long-term stability of perovskite solar cells. Here we report a multifunctional, non-volatile additive that can be used to modulate the kinetics of perovskite film growth through a hydrogen-bond-bridged intermediate phase. The additive enables the formation of large perovskite grains and coherent grain growth from bottom to the surface of the film. The enhanced film morphology results in significantly reduced non-radiative recombinations, thus boosting the power conversion efficiency of inverted (p–i–n) solar cells to 24.8% (24.5% certified) with a low energy loss of 0.36 eV. The unencapsulated devices exhibit improved thermal stability with a T₉₈ lifetime beyond 1,000 h under continuous heating at 65 ± 5 °C in a nitrogen-filled glovebox. This effective approach can also be applied to wide-bandgap perovskites and large-area devices to show reduced voltage loss and high efficiency.

Original language	English
Pages (from-to)	478-484
Number of pages	7
Journal	Nature Photonics
Volume	17
Issue number	6
Early online date	10 Apr 2023
DOIs	https://doi.org/10.1038/s41566-023-01180-6
Publication status	Published - Jun 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer Nature Limited.

Funding

The work has been supported by the Lee Shau-Kee Chair Professor (Materials Science) (A.K.-Y.J.); the support from the APRC Grant of the City University of Hong Kong (9380086, 9610508) (A.K.-Y.J.); the TCFS Grant (GHP/018/20SZ) (A.K.-Y.J.) and MRP Grant (MRP/040/21X) (A.K.-Y.J.) from the Innovation and Technology Commission of Hong Kong; the Green Tech Fund (202020164) (A.K.-Y.J.) from the Environment and Ecology Bureau of Hong Kong; the GRF grant (11307621, 11316422) (A.K.-Y.J.); from the Research Grants Council of Hong Kong, Guangdong Major Project of Basic and Applied Basic Research (2019B030302007) (A.K.-Y.J.); and the Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials (2019B121205002) (A.K.-Y.J.). We thank S. You for the technical support of single-crystal analysis and W. K. Wong for XPS measurements. A.K.-Y.J. thanks C. S. Lee for support with the UPS test.

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title = "Hydrogen-bond-bridged intermediate for perovskite solar cells with enhanced efficiency and stability",

abstract = "Improving the intrinsic film quality of metal halide perovskites is very critical to increase the power conversion efficiency and long-term stability of perovskite solar cells. Here we report a multifunctional, non-volatile additive that can be used to modulate the kinetics of perovskite film growth through a hydrogen-bond-bridged intermediate phase. The additive enables the formation of large perovskite grains and coherent grain growth from bottom to the surface of the film. The enhanced film morphology results in significantly reduced non-radiative recombinations, thus boosting the power conversion efficiency of inverted (p–i–n) solar cells to 24.8% (24.5% certified) with a low energy loss of 0.36 eV. The unencapsulated devices exhibit improved thermal stability with a T98 lifetime beyond 1,000 h under continuous heating at 65 ± 5 °C in a nitrogen-filled glovebox. This effective approach can also be applied to wide-bandgap perovskites and large-area devices to show reduced voltage loss and high efficiency.",

author = "Fengzhu LI and Xiang DENG and Zhangsheng SHI and Shengfan WU and Zixin ZENG and Deng WANG and Yang LI and Feng QI and Zhuomin ZHANG and Zhengbao YANG and JANG, {Sei Hum} and LIN, {Francis R.} and Sai‐Wing TSANG and CHEN, {Xian Kai} and JEN, {Alex K.Y.}",

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doi = "10.1038/s41566-023-01180-6",

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AU - ZENG, Zixin

AU - WANG, Deng

AU - LI, Yang

AU - QI, Feng

AU - ZHANG, Zhuomin

AU - YANG, Zhengbao

AU - JANG, Sei Hum

AU - LIN, Francis R.

AU - TSANG, Sai‐Wing

AU - CHEN, Xian Kai

AU - JEN, Alex K.Y.

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Hydrogen-bond-bridged intermediate for perovskite solar cells with enhanced efficiency and stability

Abstract

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