Enhanced light-harvesting of benzodithiophene conjugated porphyrin electron donors in organic solar cells

Xuan Zhou, Wei Tang, Pengqing Bi, Zhixin Liu, Wenhui Lu, Xingzhu Wang*, Xiaotao Hao, Rick W K WONG, Xunjin ZHU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

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 π-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 PC 71 BM 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%.

Original languageEnglish
Pages (from-to)380-386
Number of pages7
JournalJournal of Materials Chemistry C
Volume7
Issue number2
DOIs
Publication statusPublished - 2019

Scopus Subject Areas

  • Chemistry(all)
  • Materials Chemistry

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