Orthogonal Solubility in Fully Conjugated Donor-Acceptor Block Copolymers: Compatibilizers for Polymer/Fullerene Bulk-Heterojunction Solar Cells

Shi-fan Wang; Ya-nan Liu; Jie Yang; You-tian Tao; Yan Guo; Xu-dong Cao; Zhi-guo Zhang; Yong-fang Li; Wei Huang

doi:10.1007/s10118-017-1889-6

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Orthogonal Solubility in Fully Conjugated Donor-Acceptor Block Copolymers: Compatibilizers for Polymer/Fullerene Bulk-Heterojunction Solar Cells

Papers | Updated：2021-02-18

- Orthogonal Solubility in Fully Conjugated Donor-Acceptor Block Copolymers: Compatibilizers for Polymer/Fullerene Bulk-Heterojunction Solar Cells
- Orthogonal Solubility in Fully Conjugated Donor-Acceptor Block Copolymers: Compatibilizers for Polymer/Fullerene Bulk-Heterojunction Solar Cells
- Chinese Journal of Polymer Science 2017年35卷第2期页码：207-218
- Affiliations：
  
  a.Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), Nanjing 211816, China
  b.Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  c.Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing 210093, China
- Author bio：
  
  You-tian Tao (陶友田), E-mail:iamyttao@njtech.edu.cn
  Zhi-guo Zhang (张志国), E-mail:zgzhangwhu@iccas.ac.cn
  Wei Huang (黄维), E-mail:iamwhuang@njtech.edu.cn
- Funds：
  
  the National Natural Science Foundation of China(21304047);Natural Science Foundation of Jiangsu Province(13KJB430017);Research Fund for the Doctoral Program of Higher Education(20133221120015);Synergetic Innovation Center for Organic Electronics and Information Displays
- DOI：10.1007/s10118-017-1889-6
  中图分类号：
- 收稿：2016-07-18，
  
  修回：2016-8-14，
  
  录用：2016-8-15，
  
  纸质出版：2017-02
- Accepted：
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Shi-fan Wang, Ya-nan Liu, Jie Yang, 等. Orthogonal Solubility in Fully Conjugated Donor-Acceptor Block Copolymers: Compatibilizers for Polymer/Fullerene Bulk-Heterojunction Solar Cells[J]. Chinese Journal of Polymer Science, 2017,35(2):207-218.

Shi-fan Wang, Ya-nan Liu, Jie Yang, et al. Orthogonal Solubility in Fully Conjugated Donor-Acceptor Block Copolymers: Compatibilizers for Polymer/Fullerene Bulk-Heterojunction Solar Cells[J]. Chinese Journal of Polymer Science, 2017, 35(2): 207-218.
Shi-fan Wang, Ya-nan Liu, Jie Yang, 等. Orthogonal Solubility in Fully Conjugated Donor-Acceptor Block Copolymers: Compatibilizers for Polymer/Fullerene Bulk-Heterojunction Solar Cells[J]. Chinese Journal of Polymer Science, 2017,35(2):207-218. DOI： 10.1007/s10118-017-1889-6.

Shi-fan Wang, Ya-nan Liu, Jie Yang, et al. Orthogonal Solubility in Fully Conjugated Donor-Acceptor Block Copolymers: Compatibilizers for Polymer/Fullerene Bulk-Heterojunction Solar Cells[J]. Chinese Journal of Polymer Science, 2017, 35(2): 207-218. DOI： 10.1007/s10118-017-1889-6.

摘要

Abstract

Donor-acceptor (D-A) type fully conjugated block copolymer systems have been rarely reported due to the challenges in synthetic approaches to prepare well-defined low-polydispersity products. In this work

fully conjugated block copolymers are synthesized in a one-pot reaction through Stille coupling polycondensation

by utilizing the end-functional polymer copolymerization method. End-functional P3HT are copolymerized with AA (2

7-dibromo-9-(heptadecan-9-yl)-9

-carbazole) and BB (4

7-bis (5-(trimethylstannyl) thiophen-2-yl) benzo[c] [1

thiadiazole

TBT) type monomers

respectively. The orthogonal solubility between the very soluble P3HT donor and the insoluble PCDTBT acceptor block improves the purity of block copolymers as well as distinct nano-scale phase-separation compared with other reports on miscibility of donor and acceptor polymer block. Further purification

via

preparative GPC is carried out to remove the excess of unreacted P3HT and free PCDTBT as well as to achieve low polydispersity of block copolymers. The chemical structure of the P3HT-

-PCDTBT block copolymers are verified

via

H-NMR

and further confirmed by FTIR spectra. The block copolymer shows broad absorption and moderate optical band gap of 1.8 eV. Furthermore

the fully conjugated block copolymer films exhibit significant fine structures

much smoother film morphology compared to P3HT/PCDTBT polymer blends. By adding a small amount of block copolymer P3HT-

-PCDTBT as a compatibilizer into the bulk-heterojunction of P3HT:PC

BM blends

polymer solar cells with an 8% increase of short circuit current (

) and 10% increase of power conversion efficiency (PCE) are achieved owing to the improvement of the active-layer film morphology. To the best of our knowledge

this is the first report on donor-acceptor type fully conjugated block copolymer as an effective ternary additive in polymer:fullerene bulk heterojunction solar cells.

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references

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