Manipulating backbone structure with various conjugated spacers to enhance photovoltaic performance of D-A-type two-dimensional copolymerse
Journal article, 2014

A class of low band-gap two-dimensional conjugated polymers of PBDTT-FQ PBDTT-TQ PBDTT-BTQ and PBDTT-TTQ was designed and synthesized, which contains the same di(alkylthiophene)-substituted benzo[1,2-b:4,5-b']dithiophene (BDTT) and 6,7-difluoro-quinoxaline (Q) units, as well as various conjugated spacers of furan, thiophene, bithiophene and thieno[3,2-b]thiophene in the main chain. Significant effect of the varied spacers between the BDTT and Q units on the thermal, optical, electrochemical and photovoltaic properties was investigated and observed for these two-dimensional copolymers in the polymer solar cells. The maximum power conversion efficiency of 5.9% with a short circuit current of 13.7 mA/cm(2) and a fill factor of 0.56 was obtained for the PBDTT-TQ with thiophene spacer in the bulk hetero-junction PSCs using [6,6]-phenyl-C-71-butyric acid methyl ester as acceptor.

Two-dimensional copolymers

Polymer solar cells

Conjugated spacers

Photovoltaic properties

Author

D. F. Dang

XiangTan University

M. J. Xiao

Chinese Academy of Sciences

XiangTan University

P. Zhou

XiangTan University

J. W. Shi

XiangTan University

Qiang Tao

Chalmers, Chemical and Biological Engineering, Polymer Technology

H. Tan

XiangTan University

Y. F. Wang

XiangTan University

X. C. Bao

Chinese Academy of Sciences

Y. Liu

XiangTan University

Ergang Wang

Chalmers, Chemical and Biological Engineering, Polymer Technology

R. Q. Yang

Chinese Academy of Sciences

W. G. Zhu

XiangTan University

Organic Electronics: physics, materials, applications

1566-1199 (ISSN)

Vol. 15 11 2876-2884

Subject Categories

Polymer Technologies

DOI

10.1016/j.orgel.2014.08.022

More information

Latest update

10/30/2019