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Issue 11, 2017
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A thieno[3,4-b]thiophene-based small-molecule donor with a π-extended dithienobenzodithiophene core for efficient solution-processed organic solar cells

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Abstract

A small molecule donor STB-4 with dithieno[2,3-d′:2′,3′-d′]benzo[1,2-b:4′,5′-b′]dithiophene (DTBDT) as the central moiety was designed and synthesized for solution-processed bulk-heterojunction solar cells. An optimized power conversion efficiency of 8.17% with an open-circuit voltage of 0.904 V, a short-circuit current of 13.33 mA cm−2, and a fill factor FF of 0.67 was achieved after solvent annealing (SVA). According to the detailed morphology investigations, we found that SVA refined the phase-separated morphologies of the blends, allowing the domains to become well defined with anappropriate size that is beneficial for device performance.

Graphical abstract: A thieno[3,4-b]thiophene-based small-molecule donor with a π-extended dithienobenzodithiophene core for efficient solution-processed organic solar cells

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Publication details

The article was received on 29 Jun 2017, accepted on 18 Aug 2017 and first published on 18 Aug 2017


Article type: Research Article
DOI: 10.1039/C7QM00291B
Citation: Mater. Chem. Front., 2017,1, 2349-2355
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    A thieno[3,4-b]thiophene-based small-molecule donor with a π-extended dithienobenzodithiophene core for efficient solution-processed organic solar cells

    W. Liu, Z. Zhou, T. Vergote, S. Xu and X. Zhu, Mater. Chem. Front., 2017, 1, 2349
    DOI: 10.1039/C7QM00291B

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