Active Layer Morphology Engineering of All-polymer Solar Cells by Systematically Tuning Molecular Weights of Polymer Donors/Acceptors

Ning Wang; Ying-Jian Yu; Ru-Yan Zhao; Ji-Dong Zhang; Jun Liu; Li-Xiang Wang

doi:10.1007/s10118-021-2609-9

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Active Layer Morphology Engineering of All-polymer Solar Cells by Systematically Tuning Molecular Weights of Polymer Donors/Acceptors

ARTICLE | Updated：2021-07-23

- Active Layer Morphology Engineering of All-polymer Solar Cells by Systematically Tuning Molecular Weights of Polymer Donors/Acceptors
- Active Layer Morphology Engineering of All-polymer Solar Cells by Systematically Tuning Molecular Weights of Polymer Donors/Acceptors
- Chinese Journal of Polymer Science 2021年39卷第11期页码：1449-1458
- Affiliations：
  
  a.State Key Lboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
- Author bio：
  
  liujun@ciac.ac.cn
- Funds：
  
  This work was financially supported by the National Key Research and Development Program of China (Nos. 2018YFE0100600 and 2019YFA0705902) funded by the Ministry of Science and Technology and the National Natural Science Foundation of China (Nos. 21625403 and 21875244). The authors also thank the Shanghai Synchrotron Radiation Facility (SSRF) for help with 2D-GIWAXS measurements.
- DOI：10.1007/s10118-021-2609-9
  中图分类号：
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Ning Wang, Ying-Jian Yu, Ru-Yan Zhao, 等. Active Layer Morphology Engineering of All-polymer Solar Cells by Systematically Tuning Molecular Weights of Polymer Donors/Acceptors[J]. Chinese Journal of Polymer Science, 2021,39(11):1449-1458.

Ning Wang, Ying-Jian Yu, Ru-Yan Zhao, et al. Active Layer Morphology Engineering of All-polymer Solar Cells by Systematically Tuning Molecular Weights of Polymer Donors/Acceptors[J]. Chinese Journal of Polymer Science, 2021,39(11):1449-1458.
Ning Wang, Ying-Jian Yu, Ru-Yan Zhao, 等. Active Layer Morphology Engineering of All-polymer Solar Cells by Systematically Tuning Molecular Weights of Polymer Donors/Acceptors[J]. Chinese Journal of Polymer Science, 2021,39(11):1449-1458. DOI： 10.1007/s10118-021-2609-9.

Ning Wang, Ying-Jian Yu, Ru-Yan Zhao, et al. Active Layer Morphology Engineering of All-polymer Solar Cells by Systematically Tuning Molecular Weights of Polymer Donors/Acceptors[J]. Chinese Journal of Polymer Science, 2021,39(11):1449-1458. DOI： 10.1007/s10118-021-2609-9.

摘要

Abstract

In all-polymer solar cells (APSCs), number-average molecular weights (,M,n,s) of polymer donors and polymer acceptors play an important role in active layer morphology and photovoltaic performance. In this work, based on a series of APSCs with power conversion efficiency of approaching 10%, we study the effect of ,M,n,s of both polymer donor and polymer acceptor on active layer morphology and photovoltaic performance of APSCs. We select poly[4-(5-(4,8-bis(5-((2-butyloctyl)thio)thiophen-2-yl)-6-methylbenzo[1,2-,b,:4,5-,b,']dithiophen-2-yl)thiophen-2-yl)-5,6-difluoro-2-(2-hexyldecyl)-7-(5-methylthiophen-2-yl)-2,H,-benzo[,d,][1,2,3],triazole] (CD1) as the polymer donor and poly[4-(5-(5,10-bis(2-dodecylhexadecyl)-4,4,9,9-tetrafluuoro-7-methyl-4,5,9,10-tetrahydro3a,5,8,10-tetraaza-4,9-diborapyren-2-yl)thiophen-2-yl)-7-(5-methylthiophen-2-yl)benzo[,c,][1,2,5],thiadiazole] (PBN-14) as the polymer acceptor. The ,M,n,s of polymer donor CD1 are 14.0, 35.5 and 56.1 kg/mol, respectively, and the ,M,n,s of polymer acceptor PBN-14 are 32.7, 72.4 and 103.4 kg/mol, respectively. To get the desired biscontinueous fibrous network morphololgy of the polymer donor/polymer acceptor blends, at least one polymer should have high or medium ,M,n,. Moreover, when the ,M,n, of polymer acceptor is high, the active layer morphology and APSC device performance are insensitive to the ,M,n, of polymer donor. The optimal APSC device performance is obtained when the ,M,n, of both the polymer donor and the polymer acceptor are medium. These results provide a comprehensive and deep understanding on the interplay and the effect of ,M,n, of polymer donors and polymer acceptors in high-performance APSCs.

关键词

Keywords

All-polymer solar cellsMolecular weightsPolymer aggregationActive layer morphology

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Polymerizing Ladder-type Heteroheptacene-Cored Small-Molecule Acceptors for Efficient All-Polymer Solar Cells

Recent Research Progress ofn-Type Conjugated Polymer Acceptors and All-Polymer Solar Cells

Advances in Green-Solvent-Processable All-Polymer Solar Cells