Single-junction organic solar cells with over 19% efficiency enabled by a refined double-fibril network morphology

Lei Zhu^#¹, Ming Zhang^#¹, Jinqiu Xu^#¹, Chao Li², Jun Yan³, Guanqing Zhou¹, Wenkai Zhong¹, Tianyu Hao¹, Jiali Song², Xiaonan Xue¹, Zichun Zhou¹, Rui Zeng¹, Haiming Zhu⁴, Chun-Chao Chen⁵, Roderick C I MacKenzie⁶, Yecheng Zou⁷, Jenny Nelson⁸, Yongming Zhang^{1

7}, Yanming Sun⁹, Feng Liu^{10

11}

Affiliations

¹ Frontiers Science Center for Transformative Molecules, In-situ Center for Physical Science, and Center of Hydrogen Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China.
² School of Chemistry, Beihang University, Beijing, China.
³ Department of Physics, Imperial College London, London, UK. j.yan17@imperial.ac.uk.
⁴ Department of Chemistry, Zhejiang University, Hangzhou, China.
⁵ School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China.
⁶ Department of Engineering, Durham University, Durham, UK.
⁷ State Key Laboratory of Fluorinated Functional Membrane Materials and Dongyue Future Hydrogen Energy Materials Company, Zibo, China.
⁸ Department of Physics, Imperial College London, London, UK.
⁹ School of Chemistry, Beihang University, Beijing, China. sunym@buaa.edu.cn.
¹⁰ Frontiers Science Center for Transformative Molecules, In-situ Center for Physical Science, and Center of Hydrogen Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China. fengliu82@sjtu.edu.cn.
¹¹ State Key Laboratory of Fluorinated Functional Membrane Materials and Dongyue Future Hydrogen Energy Materials Company, Zibo, China. fengliu82@sjtu.edu.cn.

^# Contributed equally.

PMID: 35513501
DOI: 10.1038/s41563-022-01244-y

Single-junction organic solar cells with over 19% efficiency enabled by a refined double-fibril network morphology

Lei Zhu et al. Nat Mater. 2022 Jun.

. 2022 Jun;21(6):656-663.

doi: 10.1038/s41563-022-01244-y. Epub 2022 May 5.

Authors

Affiliations

¹ Frontiers Science Center for Transformative Molecules, In-situ Center for Physical Science, and Center of Hydrogen Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China.
² School of Chemistry, Beihang University, Beijing, China.
³ Department of Physics, Imperial College London, London, UK. j.yan17@imperial.ac.uk.
⁴ Department of Chemistry, Zhejiang University, Hangzhou, China.
⁵ School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China.
⁶ Department of Engineering, Durham University, Durham, UK.
⁷ State Key Laboratory of Fluorinated Functional Membrane Materials and Dongyue Future Hydrogen Energy Materials Company, Zibo, China.
⁸ Department of Physics, Imperial College London, London, UK.
⁹ School of Chemistry, Beihang University, Beijing, China. sunym@buaa.edu.cn.
¹⁰ Frontiers Science Center for Transformative Molecules, In-situ Center for Physical Science, and Center of Hydrogen Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China. fengliu82@sjtu.edu.cn.
¹¹ State Key Laboratory of Fluorinated Functional Membrane Materials and Dongyue Future Hydrogen Energy Materials Company, Zibo, China. fengliu82@sjtu.edu.cn.

^# Contributed equally.

PMID: 35513501
DOI: 10.1038/s41563-022-01244-y

Abstract

In organic photovoltaics, morphological control of donor and acceptor domains on the nanoscale is the key for enabling efficient exciton diffusion and dissociation, carrier transport and suppression of recombination losses. To realize this, here, we demonstrated a double-fibril network based on a ternary donor-acceptor morphology with multi-length scales constructed by combining ancillary conjugated polymer crystallizers and a non-fullerene acceptor filament assembly. Using this approach, we achieved an average power conversion efficiency of 19.3% (certified 19.2%). The success lies in the good match between the photoelectric parameters and the morphological characteristic lengths, which utilizes the excitons and free charges efficiently. This strategy leads to an enhanced exciton diffusion length and a reduced recombination rate, hence minimizing photon-to-electron losses in the ternary devices as compared to their binary counterparts. The double-fibril network morphology strategy minimizes losses and maximizes the power output, offering the possibility of 20% power conversion efficiencies in single-junction organic photovoltaics.

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References

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Single-junction organic solar cells with over 19% efficiency enabled by a refined double-fibril network morphology

Affiliations

Single-junction organic solar cells with over 19% efficiency enabled by a refined double-fibril network morphology

Authors

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Abstract

References

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