Molecularly tailorable metal oxide clusters ensured robust interfacial connection in inverted perovskite solar cells

Fengzhu Li; Chaowei Zhao; Yanxun Li; Zhen Zhang; Xiaofeng Huang; Yuefeng Zhang; Jie Fang; Tieyuan Bian; Zhiyuan Zeng; Jun Yin; Alex K.-Y. Jen

doi:10.1126/sciadv.adq1150

Molecularly tailorable metal oxide clusters ensured robust interfacial connection in inverted perovskite solar cells

Fengzhu Li, Chaowei Zhao^*, Yanxun Li, Zhen Zhang, Xiaofeng Huang, Yuefeng Zhang, Jie Fang, Tieyuan Bian, Zhiyuan Zeng, Jun Yin^*, Alex K.-Y. Jen^*

^*Corresponding author for this work

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

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Abstract

Interfacial recombination and ion migration between perovskite and electron-transporting materials have been the persisting challenges in further improving the efficiency and stability of perovskite solar cells (PVSCs). Here, we design a series of molecularly tailorable clusters as an interlayer that can simultaneously enhance the interaction with C₆₀ and perovskite. These clusters have precisely controlled structures, decent charge carrier mobility, considerable solubility, suitable energy levels, and functional ligands, which can help passivate perovskite surface defects, form a uniform capping net to immobilize C₆₀, and build a robust coupling between perovskite and C60. The target inverted PVSCs achieve an impressive power conversion efficiency (PCE) of 25.6% without the need for additional surface passivation. Crucially, the unencapsulated device displays excellent stability under light, heat, and bias, maintaining 98% of its initial PCE after 1500 hours of maximum power point tracking. These results show great promise in the development of advanced interfacial materials for highly efficient perovskite photovoltaics.

© 2024 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.

Original language	English
Article number	eadq1150
Journal	Science Advances
Volume	10
Issue number	50
Online published	11 Dec 2024
DOIs	https://doi.org/10.1126/sciadv.adq1150
Publication status	Published - 13 Dec 2024

Funding

A.K.-Y.J. thanks the sponsorship of the Lee Shau-Kee Chair Professor (Materials Science) and the support from APRC grants (9380086, 9610419, 9610440, 9610492, and 9610508) of the City University of Hong Kong, 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, and GRF grants (11304424, 11307621, and 11316422) from the Research Grants Council of Hong Kong. C.Z. acknowledges the support of the National Natural Science Foundation of China (52163018) and the Hong Kong scholar program (XJ2022019). J.Y. acknowledges financial support from Hong Kong Polytechnic University (grant no. P0042930) and grants from the Research Grants Council of the Hong Kong Special Administrative Region, China (project nos. PolyU 25300823 and PolyU 15300724).

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abstract = "Interfacial recombination and ion migration between perovskite and electron-transporting materials have been the persisting challenges in further improving the efficiency and stability of perovskite solar cells (PVSCs). Here, we design a series of molecularly tailorable clusters as an interlayer that can simultaneously enhance the interaction with C60 and perovskite. These clusters have precisely controlled structures, decent charge carrier mobility, considerable solubility, suitable energy levels, and functional ligands, which can help passivate perovskite surface defects, form a uniform capping net to immobilize C60, and build a robust coupling between perovskite and C60. The target inverted PVSCs achieve an impressive power conversion efficiency (PCE) of 25.6% without the need for additional surface passivation. Crucially, the unencapsulated device displays excellent stability under light, heat, and bias, maintaining 98% of its initial PCE after 1500 hours of maximum power point tracking. These results show great promise in the development of advanced interfacial materials for highly efficient perovskite photovoltaics.{\textcopyright} 2024 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.",

author = "Fengzhu Li and Chaowei Zhao and Yanxun Li and Zhen Zhang and Xiaofeng Huang and Yuefeng Zhang and Jie Fang and Tieyuan Bian and Zhiyuan Zeng and Jun Yin and Jen, {Alex K.-Y.}",

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AU - Li, Fengzhu

AU - Zhao, Chaowei

AU - Li, Yanxun

AU - Zhang, Zhen

AU - Huang, Xiaofeng

AU - Zhang, Yuefeng

AU - Fang, Jie

AU - Bian, Tieyuan

AU - Zeng, Zhiyuan

AU - Yin, Jun

AU - Jen, Alex K.-Y.

PY - 2024/12/13

Y1 - 2024/12/13

N2 - Interfacial recombination and ion migration between perovskite and electron-transporting materials have been the persisting challenges in further improving the efficiency and stability of perovskite solar cells (PVSCs). Here, we design a series of molecularly tailorable clusters as an interlayer that can simultaneously enhance the interaction with C60 and perovskite. These clusters have precisely controlled structures, decent charge carrier mobility, considerable solubility, suitable energy levels, and functional ligands, which can help passivate perovskite surface defects, form a uniform capping net to immobilize C60, and build a robust coupling between perovskite and C60. The target inverted PVSCs achieve an impressive power conversion efficiency (PCE) of 25.6% without the need for additional surface passivation. Crucially, the unencapsulated device displays excellent stability under light, heat, and bias, maintaining 98% of its initial PCE after 1500 hours of maximum power point tracking. These results show great promise in the development of advanced interfacial materials for highly efficient perovskite photovoltaics.© 2024 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.

AB - Interfacial recombination and ion migration between perovskite and electron-transporting materials have been the persisting challenges in further improving the efficiency and stability of perovskite solar cells (PVSCs). Here, we design a series of molecularly tailorable clusters as an interlayer that can simultaneously enhance the interaction with C60 and perovskite. These clusters have precisely controlled structures, decent charge carrier mobility, considerable solubility, suitable energy levels, and functional ligands, which can help passivate perovskite surface defects, form a uniform capping net to immobilize C60, and build a robust coupling between perovskite and C60. The target inverted PVSCs achieve an impressive power conversion efficiency (PCE) of 25.6% without the need for additional surface passivation. Crucially, the unencapsulated device displays excellent stability under light, heat, and bias, maintaining 98% of its initial PCE after 1500 hours of maximum power point tracking. These results show great promise in the development of advanced interfacial materials for highly efficient perovskite photovoltaics.© 2024 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.

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Molecularly tailorable metal oxide clusters ensured robust interfacial connection in inverted perovskite 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

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

Cite this

Molecularly tailorable metal oxide clusters ensured robust interfacial connection in inverted perovskite solar cells

Abstract

Funding

Publisher's Copyright Statement

UN SDGs

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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

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

Cite this