Rational Tuning of Molecular Interaction and Energy Level Alignment Enables High-Performance Organic Photovoltaics

Rui Wang; Jun Yuan; Rui Wang; Guangchao Han; Tianyi Huang; Wenchao Huang; Jingjing Xue; Hao Cheng Wang; Chunfeng Zhang; Chenhui Zhu; Pei Cheng; Dong Meng; Yuanping Yi; Kung Hwa Wei; Yingping Zou; Yang Yang

doi:10.1002/adma.201904215

Rational Tuning of Molecular Interaction and Energy Level Alignment Enables High-Performance Organic Photovoltaics

Rui Wang, Jun Yuan, Rui Wang, Guangchao Han, Tianyi Huang, Wenchao Huang, Jingjing Xue, Hao Cheng Wang, Chunfeng Zhang, Chenhui Zhu, Pei Cheng, Dong Meng, Yuanping Yi^*, Kung Hwa Wei, Yingping Zou, Yang Yang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

176 Scopus citations

Abstract

The performance of organic photovoltaics (OPVs) has rapidly improved over the past years. Recent work in material design has primarily focused on developing near-infrared nonfullerene acceptors with broadening absorption that pair with commercialized donor polymers; in the meanwhile, the influence of the morphology of the blend film and the energy level alignment on the efficiency of charge separation needs to be synthetically considered. Herein, the selection rule of the donor/acceptor blend is demonstrated by rationally considering the molecular interaction and energy level alignment, and highly efficient OPV devices using both-fluorinated or both-nonfluorinated donor/acceptor blends are realized. With the enlarged absorption, ideal morphology, and efficient charge transfer, the devices based on the PBDB-T-F/Y1-4F blend and PBDB-T-F/Y6 exhibit champion power conversion efficiencies as high as 14.8% and 15.9%, respectively.

Original language	English
Article number	1904215
Journal	Advanced Materials
Volume	31
Issue number	43
DOIs	https://doi.org/10.1002/adma.201904215
State	Published - 1 Oct 2019

Keywords

driving force
energy alignment
morphology
organic photovoltaics
organic solar cells

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Wang, R., Yuan, J., Wang, R., Han, G., Huang, T., Huang, W., Xue, J., Wang, H. C., Zhang, C., Zhu, C., Cheng, P., Meng, D., Yi, Y., Wei, K. H., Zou, Y., & Yang, Y. (2019). Rational Tuning of Molecular Interaction and Energy Level Alignment Enables High-Performance Organic Photovoltaics. Advanced Materials, 31(43), Article 1904215. https://doi.org/10.1002/adma.201904215

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abstract = "The performance of organic photovoltaics (OPVs) has rapidly improved over the past years. Recent work in material design has primarily focused on developing near-infrared nonfullerene acceptors with broadening absorption that pair with commercialized donor polymers; in the meanwhile, the influence of the morphology of the blend film and the energy level alignment on the efficiency of charge separation needs to be synthetically considered. Herein, the selection rule of the donor/acceptor blend is demonstrated by rationally considering the molecular interaction and energy level alignment, and highly efficient OPV devices using both-fluorinated or both-nonfluorinated donor/acceptor blends are realized. With the enlarged absorption, ideal morphology, and efficient charge transfer, the devices based on the PBDB-T-F/Y1-4F blend and PBDB-T-F/Y6 exhibit champion power conversion efficiencies as high as 14.8% and 15.9%, respectively.",

keywords = "driving force, energy alignment, morphology, organic photovoltaics, organic solar cells",

author = "Rui Wang and Jun Yuan and Rui Wang and Guangchao Han and Tianyi Huang and Wenchao Huang and Jingjing Xue and Wang, {Hao Cheng} and Chunfeng Zhang and Chenhui Zhu and Pei Cheng and Dong Meng and Yuanping Yi and Wei, {Kung Hwa} and Yingping Zou and Yang Yang",

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AU - Xue, Jingjing

AU - Wang, Hao Cheng

AU - Zhang, Chunfeng

AU - Zhu, Chenhui

AU - Cheng, Pei

AU - Meng, Dong

AU - Yi, Yuanping

AU - Wei, Kung Hwa

AU - Zou, Yingping

AU - Yang, Yang

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KW - organic solar cells

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Rational Tuning of Molecular Interaction and Energy Level Alignment Enables High-Performance Organic Photovoltaics

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