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Enhanced Light-harvesting of Benzodithiophene Conjugated Porphyrin Electron Donors in Organic Solar Cells

Abstract

To address the intrinsic issue of conventional porphyrin derivatives with a deficient absorption between Soret and Q bands, we design and synthesize two porphyrin molecules (BDTP-1 and BDTP-2) bearing meso-alkyl substituted porphyrin core, benzodithiohene (BDT) ethynylene π-bridge and end-capping ethylrhodanine derivatives. Except for the characteristic Soret and Q bands of porphyrin macrocycle, an extra peak (521 nm for BDTP-1 and 536 nm for BDTP-2) is derived from the BDT units. Using the porphyrin small molecules as electron donors and PC71BM as electron acceptor, the devices show a broad spectral photocurrent generation with significant contribution of greenlight-harvesting (490-550 nm), resulting in high performances with PCEs up to 7.97%.

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Publication details

The article was received on 06 Sep 2018, accepted on 28 Nov 2018 and first published on 01 Dec 2018


Article type: Paper
DOI: 10.1039/C8TC04495C
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Enhanced Light-harvesting of Benzodithiophene Conjugated Porphyrin Electron Donors in Organic Solar Cells

    X. Zhou, W. Tang, P. Bi, Z. Liu, W. Li, X. Wang, X. Hao, W. R. Wong and X. Zhu, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC04495C

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