Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China.
School of Chemical Science, University of Chinese Academy of Sciences, 100049, Beijing, China.
Nat Commun. 2019 Jan 31;10(1):519. doi: 10.1038/s41467-019-08508-3.
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.
具有 n 型有机半导体作为受体的聚合物太阳能电池 (PSC) 的应用需要进一步提高粉末转化效率、提高相关材料和器件的稳定性和降低成本。在这里，我们报告了一种通过使用 Amberlyst15 催化剂简化 4,4,9,9-四己基-4,9-二氢-s-茚并[1,2-b:5,6-b']二噻吩的合成路线。基于这条合成路线和甲氧基取代，我们合成了两种具有低成本、较少合成步骤、简单后处理和高收率的受体。此外，甲氧基取代提高了产率和效率。用 MO-IDIC-2F（3,9-双（2-亚甲基-5 或 6-氟-（3-（1,1-二氰基亚甲基）-茚满酮）-4,4,9,9-四己基-5,10-二甲氧基-4,9-二氢-s-茚并[1,2-b:5,6-b']二噻吩）作为受体，器件的效率达到了 13.46%。基于成本分析，与文献中报道的那些 PSCs 相比，基于 MO-IDIC-2F 的 PSCs 具有低成本和高光伏性能的巨大优势。因此，MO-IDIC-2F 将成为 PSCs 商业化应用中很有前途的低成本受体。
