Redox mediator-stabilized wide-bandgap perovskites for monolithic perovskite-organic tandem solar cells

Shengfan Wu; Yichao Yan; Jun Yin; Kui Jiang; Fengzhu Li; Zixin Zeng; Sai-Wing Tsang; Alex K.-Y. Jen

doi:10.1038/s41560-024-01451-8

Redox mediator-stabilized wide-bandgap perovskites for monolithic perovskite-organic tandem solar cells

Shengfan Wu, Yichao Yan, Jun Yin, Kui Jiang, Fengzhu Li, Zixin Zeng, Sai-Wing Tsang, Alex K.-Y. Jen^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

108 Citations (Scopus)

Abstract

Halide segregation critically limits the stability of mixed-halide perovskite solar cells under device operational conditions. There is a strong indication that halide oxidation is the primary driving force behind halide de-mixing. To alleviate this problem, we develop a series of multifunctional redox mediators based on anthraquinone that selectively reduce iodine and oxidize metallic Pb⁰, while simultaneously passivating defects through tailored cationic substitution. These effects enable wide-bandgap perovskite solar cells to achieve a power conversion efficiency of 19.58% and a high open-circuit voltage of 1.35 V for 1.81-eV PSCs. The device retains 95% of its initial efficiency after operating at its maximum power point for 500 h. Most notably, by integrating the perovskite device into the monolithic perovskite-organic tandem solar cell as a wide-bandgap subcell, we report an efficiency of 25.22% (certified 24.27%) with impressive long-term operational stability (T₉₀ > 500 h). © The Author(s), under exclusive licence to Springer Nature Limited 2024

Original language	English
Pages (from-to)	411-421
Journal	Nature Energy
Volume	9
Issue number	4
Online published	26 Jan 2024
DOIs	https://doi.org/10.1038/s41560-024-01451-8
Publication status	Published - Apr 2024

Funding

A.K.-Y.J. is thankful for the sponsorship of the Lee Shau-Kee Chair Professor (Materials Science) and support from APRC grants from the City University of Hong Kong (9380086, 9610419, 9610492 and 9610508), a TCFS grant (GHP/018/20SZ), an MRP grant (MRP/040/21X) from the Innovation and Technology Commission of Hong Kong, the Green Tech Fund (202020164) from the Environment and Ecology Bureau of Hong Kong, GRF grants (11307621 and 11316422) from the Research Grants Council of Hong Kong, Shenzhen Science and Technology Program (SGDX20201103095412040), Guangdong Major Project of Basic and Applied Basic Research (2019B030302007), Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials (2019B121205002), Guangzhou Huangpu Technology Bureau (2022GH02) and a CRF grant (C6023-19GF) from the Research Grants Council of Hong Kong. J.Y. acknowledges support from the Hong Kong Polytechnic University (grant no. P0042930). The work described in this paper was partially supported by a fellowship award from the Research Grants Council of the Hong Kong Special Administrative Region, China (project no. CityU PDFS2223-1S08).

Research Keywords

perovskite
tandem solar cells
energy loss
halide segregation

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abstract = "Halide segregation critically limits the stability of mixed-halide perovskite solar cells under device operational conditions. There is a strong indication that halide oxidation is the primary driving force behind halide de-mixing. To alleviate this problem, we develop a series of multifunctional redox mediators based on anthraquinone that selectively reduce iodine and oxidize metallic Pb0, while simultaneously passivating defects through tailored cationic substitution. These effects enable wide-bandgap perovskite solar cells to achieve a power conversion efficiency of 19.58% and a high open-circuit voltage of 1.35 V for 1.81-eV PSCs. The device retains 95% of its initial efficiency after operating at its maximum power point for 500 h. Most notably, by integrating the perovskite device into the monolithic perovskite-organic tandem solar cell as a wide-bandgap subcell, we report an efficiency of 25.22% (certified 24.27%) with impressive long-term operational stability (T90 > 500 h). {\textcopyright} The Author(s), under exclusive licence to Springer Nature Limited 2024",

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AU - Wu, Shengfan

AU - Yan, Yichao

AU - Yin, Jun

AU - Jiang, Kui

AU - Li, Fengzhu

AU - Zeng, Zixin

AU - Tsang, Sai-Wing

AU - Jen, Alex K.-Y.

PY - 2024/4

Y1 - 2024/4

N2 - Halide segregation critically limits the stability of mixed-halide perovskite solar cells under device operational conditions. There is a strong indication that halide oxidation is the primary driving force behind halide de-mixing. To alleviate this problem, we develop a series of multifunctional redox mediators based on anthraquinone that selectively reduce iodine and oxidize metallic Pb0, while simultaneously passivating defects through tailored cationic substitution. These effects enable wide-bandgap perovskite solar cells to achieve a power conversion efficiency of 19.58% and a high open-circuit voltage of 1.35 V for 1.81-eV PSCs. The device retains 95% of its initial efficiency after operating at its maximum power point for 500 h. Most notably, by integrating the perovskite device into the monolithic perovskite-organic tandem solar cell as a wide-bandgap subcell, we report an efficiency of 25.22% (certified 24.27%) with impressive long-term operational stability (T90 > 500 h). © The Author(s), under exclusive licence to Springer Nature Limited 2024

AB - Halide segregation critically limits the stability of mixed-halide perovskite solar cells under device operational conditions. There is a strong indication that halide oxidation is the primary driving force behind halide de-mixing. To alleviate this problem, we develop a series of multifunctional redox mediators based on anthraquinone that selectively reduce iodine and oxidize metallic Pb0, while simultaneously passivating defects through tailored cationic substitution. These effects enable wide-bandgap perovskite solar cells to achieve a power conversion efficiency of 19.58% and a high open-circuit voltage of 1.35 V for 1.81-eV PSCs. The device retains 95% of its initial efficiency after operating at its maximum power point for 500 h. Most notably, by integrating the perovskite device into the monolithic perovskite-organic tandem solar cell as a wide-bandgap subcell, we report an efficiency of 25.22% (certified 24.27%) with impressive long-term operational stability (T90 > 500 h). © The Author(s), under exclusive licence to Springer Nature Limited 2024

KW - perovskite

KW - tandem solar cells

KW - energy loss

KW - halide segregation

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DO - 10.1038/s41560-024-01451-8

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JO - Nature Energy

JF - Nature Energy

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ER -

Redox mediator-stabilized wide-bandgap perovskites for monolithic perovskite-organic tandem solar cells

Abstract

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GRF: Molecular Engineering of 1D Hybrid Perovskites for Improving the Performance and Stability of Metal Halide Perovskite Solar Cells

GRF: Rational Design and Synthesis of a New Class of Non-Fullerene Acceptors and Matched Donor Polymers for Highly Efficient Organic Photovoltaics

ITF: Development of Efficient and Stable Perovskite Solar Cell with Safe-to-Use

Cite this

Redox mediator-stabilized wide-bandgap perovskites for monolithic perovskite-organic tandem solar cells

Abstract

Funding

Research Keywords

UN SDGs

Access Output

Other Access Options

Permanent Link

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Projects

GRF: Molecular Engineering of 1D Hybrid Perovskites for Improving the Performance and Stability of Metal Halide Perovskite Solar Cells

GRF: Rational Design and Synthesis of a New Class of Non-Fullerene Acceptors and Matched Donor Polymers for Highly Efficient Organic Photovoltaics

ITF: Development of Efficient and Stable Perovskite Solar Cell with Safe-to-Use

Cite this