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, PC71BM 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.

中文翻译：

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以色酮丙二腈为吸电子基团的新型染料的合成与表征及其光伏效应

摘要 两种新的供体材料小分子染料 IDTT-OX 和 IDTT-EPMP-IDC 已成功合成并表征为溶液处理的本体异质结有机太阳能电池 (OSC)。这些染料包含作为供体部分的茚二噻吩并 [3,2-b] 噻吩 (IDTT)、苯基异恶唑酮 (OX) 和丙二腈衍生物 (EPMP-IDC) 作为受体。IDTT-OX 表现出强烈的自聚集行为和宽吸收，光学带隙为 1.88 eV。虽然 IDTT-EPMP-IDC 表现出不同的行为，但 IDTT-EPMP 的自聚集受到分子中 EPMP-IDC 官能团处烷基的存在的有效限制，并且具有 1.60 eV 的光学带隙。制造了基于 IDTT-OX（或 IDTT-EPMP-IDC）作为供体、PC71BM 作为受体的混合物的倒置型 OSC。