Highly Efficient Random Terpolymers for Photovoltaic Applications with Enhanced Absorption and Molecular Aggregation

Xiao-peng Xu; Guang-jun Zhang; Yun-zhe Zhao; Jiang Liu; Ying Li; Qiang Peng

doi:10.1007/s10118-017-1877-x

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Highly Efficient Random Terpolymers for Photovoltaic Applications with Enhanced Absorption and Molecular Aggregation

Papers | Updated：2021-02-18

- Highly Efficient Random Terpolymers for Photovoltaic Applications with Enhanced Absorption and Molecular Aggregation
- Chinese Journal of Polymer Science Vol. 35, Issue 2, Pages: 249-260(2017)
- Affiliations：
  
  a.Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610064, China
  b.Chengdu Green Energy and Green Manufacturing Technology R & D Center, Chengdu 610207, China
- Author bio：
  
  Jiang Liu (刘江), E-mail:546jiang@163.com
  Qiang Peng (彭强), E-mail:qiangpengjohnny@yahoo.com
- Funds：
- DOI：10.1007/s10118-017-1877-x
  CLC：
- Received：20 August 2016，
  
  Revised：2016-9-18，
  
  Accepted：20 September 2016，
  
  Published：2017-02
- Accepted：
Scan QR Code
Xiao-peng Xu, Guang-jun Zhang, Yun-zhe Zhao, et al. Highly Efficient Random Terpolymers for Photovoltaic Applications with Enhanced Absorption and Molecular Aggregation[J]. Chinese Journal of Polymer Science, 2017, 35(2): 249-260.
DOI：

Xiao-peng Xu, Guang-jun Zhang, Yun-zhe Zhao, et al. Highly Efficient Random Terpolymers for Photovoltaic Applications with Enhanced Absorption and Molecular Aggregation[J]. Chinese Journal of Polymer Science, 2017, 35(2): 249-260. DOI： 10.1007/s10118-017-1877-x.

摘要

Abstract

A series of copolymers

based on benzo[1

2-b:4

5-b']dithiophene (BDT) as the electron donor and 2

3-benzothiadiazole (BT)/diketopyrrolo[3

4-c]

pyrrole (DPP) as the electron acceptors

were synthesized for highly efficient polymer solar cells. By changing the BT/DPP ratio in the conjugated backbone

the absorption

energy levels

molecular aggregation and carrier mobility could be finely tuned. With increased DPP content

the absorption range was extended to the longer wavelength region with narrower bandgaps. The highest occupied molecular orbital (HOMO) levels were also raised up and the molecular aggregation was enhanced. The balance of these factors would afford a remarkable device performance enhancement. Polymer P3 with BT:DPP=0.7:0.3 (molar ratio) exhibited the highest power conversion efficiency (PCE) of 9.01%

with open circuit voltage (

)=0.73 V

short current density (

)=18.45 mA·cm

-2

and fill factor (FF)=66.9%. The PCE value was improved by 48.7% compared to P1 and by 117.6% compared to P7

respectively

indicating a great potential in photovoltaic application.

关键词

Keywords

references

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