Synthesis and characterization of new dyes based on chromone malononitrile as the electron withdrawing group and their photovoltaic effect. (2nd July 2020)

• Record Type: Journal Article
• Authors: Salma, Sabrina Aufar; Jin, Ho Cheol; Kim, Joo Hyun
• Is Part Of: Molecular crystals and liquid crystals. Volume 705(2020)
• Page Start: 28
• Page End: 34
• Publication Date: 2020-07-02
• Subjects: Indacenodithienothiophene-based photoactive material -- inverted organic solar cell -- small molecule donor; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2020.1741820
• Languages: English
• ISSNs: 1542-1406

Abstract

Abstract: Two new small molecule dyes for the donor material, named IDTT-OX and IDTT-EPMP-IDC have been successfully synthesized and characterized for solution-processed bulk heterojunction organic solar cells (OSCs). These dyes are containing indacedithieno[3, 2-b]thiophene (IDTT) as the donor moiety, phenylisoxazolone (OX) and malononitrile derivatives (EPMP-IDC) as the acceptor. IDTT-OX exhibits a strong self-aggregation behavior and broad absorption with an optical band gap of 1.88 eV. While IDTT-EPMP-IDC shows different behavior, the self-aggregation of IDTT-EPMP was efficiently restricted by the presence of the alkyl group at EPMP-IDC functional group in the molecule and it has 1.60 eV optical bandgap. The inverted-type OSCs based on the blend of IDTT-OX (or IDTT-EPMP-IDC) as a donor, PC71 BM as an acceptor are fabricated. The power conversion efficiencies (PCEs) of the optimized OSCs are reached up to 0.29% for IDTT-OX and 2.07% for IDTT-EPMP-IDC.