Manipulating backbone structure with various conjugated spacers to enhance photovoltaic performance of D-A-type two-dimensional copolymerse
Artikel i vetenskaplig tidskrift, 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.

Polymer solar cells

Photovoltaic properties

Two-dimensional copolymers

Conjugated spacers

Författare

D. F. Dang

M. J. Xiao

P. Zhou

J. W. Shi

Qiang Tao

Chalmers, Kemi- och bioteknik, Polymerteknologi

H. Tan

Y. F. Wang

X. C. Bao

Y. Liu

Ergang Wang

Chalmers, Kemi- och bioteknik, Polymerteknologi

R. Q. Yang

W. G. Zhu

Organic Electronics: physics, materials, applications

1566-1199 (ISSN)

Vol. 15 2876-2884

Ämneskategorier

Polymerteknologi

DOI

10.1016/j.orge1.2014.08.022