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首页> 外文期刊>RSC Advances >Solution processable star-shaped molecules with a triazine core and branching thienylenevinylenes for bulk heterojunction solar cells
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Solution processable star-shaped molecules with a triazine core and branching thienylenevinylenes for bulk heterojunction solar cells

机译：具有三嗪核和支链噻吩亚乙烯基的溶液可加工星形分子，用于体异质结太阳能电池

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摘要

Two new star-shaped A-pi-D molecules with triazine as a core and an acceptor unit, thienylenevinylene as the pi bridge, and tert-butyl-substituted triphenylamine (tTPA)- or carbazole (tCz) as the end group and donor units of TTVTPA and TTVCz were synthesized for their application as donor materials in solution processed bulk heterojunction organic solar cells (OSCs). The charge transfer was convergent from peripheral groups to the central core along the conjugated branches in these star-shaped molecules (SSMs). TTVTPA and TTVCz are soluble in common organic solvents. Excellent thermal stability was observed for TTVTPA and TTVCz. OSCs were fabricated by spin-coating a blend of each SSM with the fullerene derivatives (PC61BM or PC71BM) as a composite film-type photoactive layer. The PV properties of the TTVTPA/fullerene derivative based OSCs were considerably better than those of the TTVCz/fullerene derivative blend based OSCs. A power conversion efficiency of 2.48%, a short-circuit current density of 10.57 mA cm(-2), an open-circuit voltage of 0.69 V, and a fill factor of 0.34 were observed for the OSC based on the active layer of TTVTPA/PC71BM (1 : 7, w/w).
机译：两个新的星形A-pi-D分子，以三嗪为核心和一个受体单元，以亚噻吩乙烯为pi桥，以叔丁基取代的三苯胺（tTPA）-或咔唑（tCz）为端基和给体单元合成了TTVTPA和TTVCz的一部分，作为它们在溶液处理的整体异质结有机太阳能电池（OSC）中的施主材料。电荷转移从外围基团沿着这些星形分子（SSM）中的共轭分支收敛到中心核。 TTVTPA和TTVCz可溶于常见的有机溶剂。 TTVTPA和TTVCz观察到极好的热稳定性。通过旋涂每种SSM与富勒烯衍生物（PC61BM或PC71BM）的混合物作为复合膜型光敏层来制备OSC。基于TTVTPA /富勒烯衍生物的OSC的PV性能明显优于基于TTVCz /富勒烯衍生物的共混物的OSC。对于基于TTVTPA有源层的OSC，观察到功率转换效率为2.48％，短路电流密度为10.57 mA cm（-2），开路电压为0.69 V，填充系数为0.34 / PC71BM（1：7，w / w）。

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