标题：Enhanced light-harvesting of benzodithiophene conjugated porphyrin electron donors in organic solar cells
作者：Zhou, Xuan; Tang, Wei; Bi, Pengqing; Liu, Zhixin; Lu, Wenhui; Wang, Xingzhu; Hao, Xiaotao; Wong, Wai-Kwok; Zhu, Xunjin
作者机构：[Zhou, Xuan; Wong, Wai-Kwok; Zhu, Xunjin] Hong Kong Baptist Univ, Dept Chem, Kowloon Tong, Waterloo Rd, Hong Kong, Peoples R China.; [Zhou, Xuan; Wo 更多
通讯作者：Wang, Xingzhu;Zhu, XJ;Zhu, XJ;Wang, XZ;Wang, XZ;Hao, XT;Wang, XZ
通讯作者地址：[Zhu, XJ]Hong Kong Baptist Univ, Dept Chem, Kowloon Tong, Waterloo Rd, Hong Kong, Peoples R China;[Zhu, XJ]Hong Kong Baptist Univ, Inst Mol Funct Mat, 更多
来源：JOURNAL OF MATERIALS CHEMISTRY C
摘要：To address the intrinsic issue of conventional porphyrin derivatives with a deficient absorption between Soret and Q bands, we designed and synthesized two porphyrin molecules (BDTP-1 and BDTP-2) bearing a meso-alkyl substituted porphyrin core, benzodithiohene (BDT) ethynylene -bridge and end-capping ethylrhodanine derivatives. Apart from the characteristic Soret and Q bands of porphyrin macrocycle, an extra peak (521 nm for BDTP-1 and 536 nm for BDTP-2) was derived from the BDT units. Using the porphyrin small molecules as electron donors and PC71BM as an electron acceptor, the devices show broad spectral photocurrent generation with a significant contribution from greenlight-harvesting (490-550 nm), resulting in high performances with PCEs up to 7.97%.