Regulating the crystallization of mixed-halide perovskites by cation alloying for perovskite-organic tandem solar cells

Mingqian Chen; Yanxun Li; Zixin Zeng; Ming Liu; Tao Du; Xiaofeng Huang; Leyu Bi; Jiarong Wang; Wenlin Jiang; Yidan An; Sai-Wing Tsang; Jun Yin; Shengfan Wu; Alex K.-Y. Jen

doi:10.1039/d4ee03045a

Regulating the crystallization of mixed-halide perovskites by cation alloying for perovskite-organic tandem solar cells

Mingqian Chen, Yanxun Li, Zixin Zeng, Ming Liu, Tao Du, Xiaofeng Huang, Leyu Bi, Jiarong Wang, Wenlin Jiang, Yidan An, Sai-Wing Tsang, Jun Yin^*, Shengfan Wu^*, Alex K.-Y. Jen^*

^*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

Halide segregation and energy loss pose significant challenges for wide-bandgap perovskite solar cells, impairing their photovoltage and device stability. These issues are often exacerbated by inferior film quality and inhomogeneous halide distribution due to unbalanced crystallization processes. To address these challenges, we developed a novel strategy using a cation alloy that not only tailors the lattice properties and crystallization but also effectively passivates the defects. This approach enables homogeneous halide distribution and substantially reduced defect density. These improvements have led to a remarkable power conversion efficiency (PCE) of 19.50% with a record open-circuit voltage of 1.35 V for 1.79 eV perovskite solar cells, approaching ∼90% of its S-Q limit. Furthermore, the champion device could maintain 93% of its initial efficiency after operating at its maximum power point for 500 hours. By integrating these perovskite devices into a monolithic perovskite-organic tandem solar cell (PO-TSC) as the wide-bandgap subcell, we demonstrated a high PCE of 25.54%. This efficiency is among the highest values reported for PO-TSCs, presenting a significant step forward in these promising tandem cells.
© 2024 The Royal Society of Chemistry.

Original language	English
Pages (from-to)	9580-9589
Journal	Energy and Environmental Science
Volume	17
Issue number	24
Online published	6 Nov 2024
DOIs	https://doi.org/10.1039/d4ee03045a
Publication status	Published - 21 Dec 2024

Funding

A. K. Y. J. thanks the sponsorship of the Lee Shau-Kee Chair Professor (Materials Science), and the support from the APRC Grant of the City University of Hong Kong (9380086, 9610508, 9610419, 9610440, and 9610492), the TCFS Grant (GHP/018/20SZ), the MHKJFS Grant (MHP/054/23) and 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, the GRF grants (11304424, 11307621, 11316422) from the Research Grants Council of Hong Kong, CRS grants (CRS_CityU104/23, CRS_HKUST203/23) from the Research Grants Council of Hong Kong, Guangdong Major Project of Basic and Applied Basic Research (2019B030302007), Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials (2019B121205002), the Guangzhou Huangpu Technology Bureau (2022GH02) and Shenzhen Science and Technology Program (SGDX20201103095412040), Guangdong. J. Y. acknowledges financial support from Hong Kong Polytechnic University (Grant no. P0042930) and a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. PolyU 25300823).

Research Keywords

Perovskite
Defect density
Organic s olar cells
Solar power generation

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title = "Regulating the crystallization of mixed-halide perovskites by cation alloying for perovskite-organic tandem solar cells",

abstract = "Halide segregation and energy loss pose significant challenges for wide-bandgap perovskite solar cells, impairing their photovoltage and device stability. These issues are often exacerbated by inferior film quality and inhomogeneous halide distribution due to unbalanced crystallization processes. To address these challenges, we developed a novel strategy using a cation alloy that not only tailors the lattice properties and crystallization but also effectively passivates the defects. This approach enables homogeneous halide distribution and substantially reduced defect density. These improvements have led to a remarkable power conversion efficiency (PCE) of 19.50% with a record open-circuit voltage of 1.35 V for 1.79 eV perovskite solar cells, approaching ∼90% of its S-Q limit. Furthermore, the champion device could maintain 93% of its initial efficiency after operating at its maximum power point for 500 hours. By integrating these perovskite devices into a monolithic perovskite-organic tandem solar cell (PO-TSC) as the wide-bandgap subcell, we demonstrated a high PCE of 25.54%. This efficiency is among the highest values reported for PO-TSCs, presenting a significant step forward in these promising tandem cells.{\textcopyright} 2024 The Royal Society of Chemistry.",

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doi = "10.1039/d4ee03045a",

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T1 - Regulating the crystallization of mixed-halide perovskites by cation alloying for perovskite-organic tandem solar cells

AU - Chen, Mingqian

AU - Li, Yanxun

AU - Zeng, Zixin

AU - Liu, Ming

AU - Du, Tao

AU - Huang, Xiaofeng

AU - Bi, Leyu

AU - Wang, Jiarong

AU - Jiang, Wenlin

AU - An, Yidan

AU - Tsang, Sai-Wing

AU - Yin, Jun

AU - Wu, Shengfan

AU - Jen, Alex K.-Y.

PY - 2024/12/21

Y1 - 2024/12/21

N2 - Halide segregation and energy loss pose significant challenges for wide-bandgap perovskite solar cells, impairing their photovoltage and device stability. These issues are often exacerbated by inferior film quality and inhomogeneous halide distribution due to unbalanced crystallization processes. To address these challenges, we developed a novel strategy using a cation alloy that not only tailors the lattice properties and crystallization but also effectively passivates the defects. This approach enables homogeneous halide distribution and substantially reduced defect density. These improvements have led to a remarkable power conversion efficiency (PCE) of 19.50% with a record open-circuit voltage of 1.35 V for 1.79 eV perovskite solar cells, approaching ∼90% of its S-Q limit. Furthermore, the champion device could maintain 93% of its initial efficiency after operating at its maximum power point for 500 hours. By integrating these perovskite devices into a monolithic perovskite-organic tandem solar cell (PO-TSC) as the wide-bandgap subcell, we demonstrated a high PCE of 25.54%. This efficiency is among the highest values reported for PO-TSCs, presenting a significant step forward in these promising tandem cells.© 2024 The Royal Society of Chemistry.

AB - Halide segregation and energy loss pose significant challenges for wide-bandgap perovskite solar cells, impairing their photovoltage and device stability. These issues are often exacerbated by inferior film quality and inhomogeneous halide distribution due to unbalanced crystallization processes. To address these challenges, we developed a novel strategy using a cation alloy that not only tailors the lattice properties and crystallization but also effectively passivates the defects. This approach enables homogeneous halide distribution and substantially reduced defect density. These improvements have led to a remarkable power conversion efficiency (PCE) of 19.50% with a record open-circuit voltage of 1.35 V for 1.79 eV perovskite solar cells, approaching ∼90% of its S-Q limit. Furthermore, the champion device could maintain 93% of its initial efficiency after operating at its maximum power point for 500 hours. By integrating these perovskite devices into a monolithic perovskite-organic tandem solar cell (PO-TSC) as the wide-bandgap subcell, we demonstrated a high PCE of 25.54%. This efficiency is among the highest values reported for PO-TSCs, presenting a significant step forward in these promising tandem cells.© 2024 The Royal Society of Chemistry.

KW - Perovskite

KW - Defect density

KW - Organic s olar cells

KW - Solar power generation

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JF - Energy and Environmental Science

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Regulating the crystallization of mixed-halide perovskites by cation alloying for perovskite-organic tandem solar cells

Abstract

Funding

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GRF: Development of Multifunctional Redox Mediators to Mitigate Halide Segregation in Wide-Bandgap Perovskites for Perovskite Based Tandem Solar Cells

ITF: Innovative Technology and Critical Materials for Developing Flexible Tandem Solar Cells with Ultra-high Specific Power

NSFC-CRS: Integrated Material Design and Device Engineering to Overcome the Limits of Non-radiative Losses and Stability in Next-generation Organic Photovoltaics

Cite this

Regulating the crystallization of mixed-halide perovskites by cation alloying for perovskite-organic tandem solar cells

Abstract

Funding

Research Keywords

UN SDGs

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

GRF: Development of Multifunctional Redox Mediators to Mitigate Halide Segregation in Wide-Bandgap Perovskites for Perovskite Based Tandem Solar Cells

ITF: Innovative Technology and Critical Materials for Developing Flexible Tandem Solar Cells with Ultra-high Specific Power

NSFC-CRS: Integrated Material Design and Device Engineering to Overcome the Limits of Non-radiative Losses and Stability in Next-generation Organic Photovoltaics

Cite this