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

D. F. Dang ; M. J. Xiao ; P. Zhou ; J. W. Shi ; Qiang Tao (Institutionen för kemi- och bioteknik, Polymerteknologi) ; H. Tan ; Y. F. Wang ; X. C. Bao ; Y. Liu ; Ergang Wang (Institutionen för kemi- och bioteknik, Polymerteknologi) ; R. Q. Yang ; W. G. Zhu
Organic Electronics (1566-1199). Vol. 15 (2014), 11, p. 2876-2884.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Polymer solar cells, Two-dimensional copolymers, Conjugated spacers, Photovoltaic properties



Denna post skapades 2014-12-08.
CPL Pubid: 207613

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Polymerteknologi (2005-2014)

Ämnesområden

Polymerteknologi

Chalmers infrastruktur