Álvaro-Martins Maria J, Sánchez José G, Lavarda Giulia, Molina Desiré, Pallarès Josep, Torres Tomás, Marsal Lluis F, Sastre-Santos Ángela
Instituto de Bioingeniería, Universidad Miguel Hernández, 03202, Elche, Spain.
Departament d'Enginyeria Electronica Electrica i Automatica, Universitat Rovira i Virgili, 43007, Tarragona, Spain.
Chempluschem. 2021 Oct;86(10):1366-1373. doi: 10.1002/cplu.202100103. Epub 2021 May 11.
Four star-shaped electron acceptors (C -OPh, C -OPh, C -Cl and C -Cl) based on a subphthalocyanine core bearing three diketopyrrolopyrrole wings linked by an acetylene bridge have been synthesized. These derivatives feature two different axial substituents (i. e., 4-tert-butylphenoxy (OPh) or chlorine (Cl)) and for each of them, both the C and the C regioisomers have been investigated. The four compounds exhibit a broad absorption band in the 450-700 nm region, with bandgap values near to 2 eV. These materials were applied in the active layer of inverted bulk-heterojunction polymer solar cells in combination with the donor polymer PBDB-T. Derivatives bearing the OPh axial group showed the best performances, with C -OPh being the most promising with a PCE of 3.27 % and a V as high as 1.17 V. Despite presenting the widest absorption range, the photovoltaic results obtained with C -Cl turned out to be the lowest (PCE=1.01 %).
已经合成了四种基于亚酞菁核的星形电子受体（C -OPh、C -OPh、C -Cl和C -Cl），该亚酞菁核带有通过乙炔桥连接的三个二酮吡咯并吡咯翼。这些衍生物具有两种不同的轴向取代基（即4-叔丁基苯氧基（OPh）或氯（Cl）），并且对于它们中的每一种，都研究了C和C区域异构体。这四种化合物在450-700 nm区域表现出宽吸收带，带隙值接近2 eV。这些材料与供体聚合物PBDB-T一起应用于倒置体异质结聚合物太阳能电池的活性层。带有OPh轴向基团的衍生物表现出最佳性能，其中C -OPh最有前景，其光电转换效率（PCE）为3.27 %，开路电压（V）高达1.17 V。尽管C -Cl具有最宽的吸收范围，但其光伏结果却是最低的（PCE = 1.01 %）。
