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Issue 2, 2019
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Enhanced light-harvesting of benzodithiophene conjugated porphyrin electron donors in organic solar cells

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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 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%.

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

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Supplementary files

Article information


Submitted
06 Sep 2018
Accepted
28 Nov 2018
First published
01 Dec 2018

J. Mater. Chem. C, 2019,7, 380-386
Article type
Paper

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

X. Zhou, W. Tang, P. Bi, Z. Liu, W. Lu, X. Wang, X. Hao, W. Wong and X. Zhu, J. Mater. Chem. C, 2019, 7, 380
DOI: 10.1039/C8TC04495C

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