Synthesis and Characterization of a High Hole Mobility Material for Polymer Solar Cells

doi:10.11944/j.issn.1000-0518.2016.12.160343

Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (12): 1375-1382.DOI: 10.11944/j.issn.1000-0518.2016.12.160343

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Synthesis and Characterization of a High Hole Mobility Material for Polymer Solar Cells

YANG Dalei^a^b^c,LI Zelin^a^b^c,ZHAO Xiaoli^a^b^*(),SUN Zhaoyan^a,YANG Xiaoniu^a^b^*()

^aState Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
^bPolymer Composites Engineering Laboratory,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
^cUniversity of Chinese Academy of Sciences,Beijing 100049,China

Received:2016-08-26 Accepted:2016-09-28 Published:2016-12-05 Online:2016-12-05
Contact: ZHAO Xiaoli,YANG Xiaoniu
Supported by:
Supported by the National Natural Science Foundation of China(No.21574132, No.21504090)

Abstract

Abstract:

One of the important prerequisites of large-area production is that the power conversion efficiency of polymer solar cells is insensitive to the active layer thickness. A novel donor-acceptor copolymer, named poly[N-(2-hexyldecyl)-2,2'-bithiophene-3,3'-dicarboximide-alt-5,5-(2,5-bis(3-(decyloxy)thiophene-2-yl)-thiophene)](PBTI3T-O),with a moderate band gap has been designed and synthesized. PBTI3T-O shows a broad absorption range of 400~720 nm and good solubility in chlorobenzene(CB). The hole mobility of PBTI3T-O and [6,6]-phenyl-C71-butyric acid methyl ester(PC₇₁BM) blend is 5.90×10^-3 cm²/(V·s), which is higher than those of most other materials. The excellent charge transport property leads to a power conversion efficiency of 5.56% with a thick active layer of 237 nm. Furthermore, PBTI3T-O based device retains 97% of the highest efficiency with a thickness of ca. 300 nm, indicating its potential application in large-area production.

Key words: polymer solar cells, donor-acceptor copolymer, active layer, thick film

YANG Dalei, LI Zelin, ZHAO Xiaoli, SUN Zhaoyan, YANG Xiaoniu. Synthesis and Characterization of a High Hole Mobility Material for Polymer Solar Cells[J]. Chinese Journal of Applied Chemistry, 2016, 33(12): 1375-1382.

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Synthesis and Characterization of a High Hole Mobility Material for Polymer Solar Cells

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