Miscibility-Controlled Phase Separation in Double-Cable Conjugated Polymers for Single-Component Organic Solar Cells with Efficiencies over 8.
Type
ArticleAuthors
Jiang, XudongYang, Jinjin
Karuthedath, Safakath

Li, Junyu
Lai, Wenbin
Li, Cheng
Xiao, Chengyi
Ye, Long
Ma, Zaifei
Tang, Zheng
Laquai, Frédéric

Li, Weiwei
KAUST Department
Physical Science and Engineering (PSE) DivisionMaterial Science and Engineering Program
KAUST Solar Center (KSC)
Date
2020-09-23Online Publication Date
2020-09-23Print Publication Date
2020-11-23Embargo End Date
2021-08-21Submitted Date
2020-07-05Permanent link to this record
http://hdl.handle.net/10754/664776
Metadata
Show full item recordAbstract
In this work, a record power conversion efficiency of 8.40% was obtained in single-component organic solar cells (SCOSCs) based on double-cable conjugated polymers. This is realized based on the finding that exciton separation plays the same important role as charge transport in SCOSCs. Herein, we designed two double-cable conjugated polymers with almost the identical conjugated backbones and electron-withdrawing side units, but the extra chlorine (Cl) atoms had different positions on the conjugated backbones. We found that, when Cl atoms were positioned at the main chains, the polymer formed the twist backbones, enabling better miscibility with the naphthalene diimide side units. This could improve the interface contact between conjugated backbones and side units, resulting in efficient conversion of excitons into free charges. These observations were confirmed by systematical studies via several advanced measurements. These findings reveal the importance of charge generation process in SCOSCs and also suggest a strategy to improve this process, that is, controlling the miscibility between conjugated backbones and aromatic side units in double-cable conjugated polymers.Citation
Jiang, X., Yang, J., Karuthedath, S., Li, J., Lai, W., Li, C., … Li, W. (2020). Miscibility-Controlled Phase Separation in Double-Cable Conjugated Polymers for Single-Component Organic Solar Cells with Efficiencies over 8%. Angewandte Chemie International Edition. doi:10.1002/anie.202009272Publisher
WileyJournal
Angewandte ChemiePubMed ID
32815586Additional Links
https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.202009272ae974a485f413a2113503eed53cd6c53
10.1002/anie.202009272
Scopus Count
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