Simplified synthetic routes for low cost and high photovoltaic performance n-type organic semiconductor acceptors

Xiaojun Li, Fei Pan, Chenkai Sun, Ming Zhang, Zhiwei Wang, Jiaqi Du, Jing Wang, Min Xiao, Lingwei Xue, Zhi-Guo Zhang, Chunfeng Zhang (), Feng Liu () and Yongfang Li ()
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Xiaojun Li: Chinese Academy of Sciences
Fei Pan: Chinese Academy of Sciences
Chenkai Sun: Chinese Academy of Sciences
Ming Zhang: Shanghai Jiaotong University
Zhiwei Wang: Nanjing University
Jiaqi Du: Chinese Academy of Sciences
Jing Wang: Shanghai Jiaotong University
Min Xiao: Nanjing University
Lingwei Xue: Chinese Academy of Sciences
Zhi-Guo Zhang: Chinese Academy of Sciences
Chunfeng Zhang: Nanjing University
Feng Liu: Shanghai Jiaotong University
Yongfang Li: Chinese Academy of Sciences

Nature Communications, 2019, vol. 10, issue 1, 1-11

Abstract: Abstract The application of polymer solar cells (PSCs) with n-type organic semiconductor as acceptor requires further improving powder conversion efficiency, increasing stability and decreasing cost of the related materials and devices. Here we report a simplified synthetic route for 4,4,9,9-tetrahexyl-4,9-dihydro-s-indaceno [1,2-b:5,6-b’] dithiophene by using the catalyst of amberlyst15. Based on this synthetic route and methoxy substitution, two low cost acceptors with less synthetic steps, simple post-treatment and high yield were synthesized. In addition, the methoxy substitution improves both yield and efficiency. The high efficiency of 13.46% was obtained for the devices with MO-IDIC-2F (3,9-bis(2-methylene-5 or 6-fluoro-(3-(1,1-dicyanomethylene)-indanone)-4,4,9,9-tetrahexyl-5,10-dimethoxyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b’] dithiophene) as acceptor. Based on the cost analysis, the PSCs based on MO-IDIC-2F possess the great advantages of low cost and high photovoltaic performance in comparison with those PSCs reported in literatures. Therefore, MO-IDIC-2F will be a promising low cost acceptor for commercial application of PSCs.

Date: 2019
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DOI: 10.1038/s41467-019-08508-3

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