Monodisperse Low-Bandgap Macromolecule-Based 5,5'-Bibenzo[c][1,2,5]thiadiazole Swivel Cruciform for Organic Solar Cells.
Monodisperse Low-Bandgap Macromolecule-Based 5,5'-Bibenzo[c][1,2,5]thiadiazole Swivel Cruciform for Organic Solar Cells.
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DOI：
10.1021/mz4002436
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发表时间：
2013-06
影响因子：
5.8
通讯作者：
D. Ni;Baofeng Zhao;T. Shi;Shuying Ma;G. Tu;Hongbin Wu
中科院分区：
文献类型：
--
作者：
D. Ni;Baofeng Zhao;T. Shi;Shuying Ma;G. Tu;Hongbin Wu
以5，5 '-联苯并[c][1，2，5]噻二唑为中心节点，配以4个共轭的给体-受体臂，合成了一种新型的低能带隙星形大分子，并将其作为电子给体材料应用于体异质结太阳能电池中。与相应的第一代臂的小分子相比，具有第二代分支的大分子表现出显着增强的光伏器件性能（与PC 71 BM作为活性层共混），由于显着改善的短路电流密度（Jsc）和填充因子（FF）。Jsc和FF的改善可以归因于当将具有第二代臂的单分散大分子（SFTBT）与具有第一代支链的小分子（DFTBT）进行比较时更宽的吸收和更有利的相分离。
A novel low bandgap star-like macromolecule was synthesized and applied as electron donor material in the bulk heterojunction solar cells, in which the 5,5'-bibenzo[c][1,2,5]thiadiazole was used as the central node, in conjunction with four conjugated donor-acceptor arms. Compared with the corresponding small molecule with first generation arms, the macromolecule with second generation branches exhibited significantly enhanced photovoltaic device performances (blended with PC71BM as the active layer) due to dramatically improved short-circuit current density (Jsc) and fill factor (FF). The improvement in Jsc and FF can be attributed to the more broad absorption and the more favorable phase separation when comparing a monodisperse macromolecule with the second generation arms (SFTBT) with a small molecule with first generation branches (DFTBT).