Synthesis, thin-film morphology, and comparative study of bulk and bilayer heterojunction organic photovoltaic devices using soluble diketopyrrolopyrrole molecules
Synthesis, thin-film morphology, and comparative study of bulk and bilayer heterojunction organic photovoltaic devices using soluble diketopyrrolopyrrole molecules
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DOI：
10.1039/c1ee01544c
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发表时间：
2011-08
影响因子：
32.5
通讯作者：
William Kylberg;P. Sonar;J. Heier;Jean‐Nicolas Tisserant;C. Müller;F. Nüesch;Zhi-Kuan Chen;A. Dodabalapur
中科院分区：
文献类型：
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作者：
William Kylberg;P. Sonar;J. Heier;Jean‐Nicolas Tisserant;C. Müller;F. Nüesch;Zhi-Kuan Chen;A. Dodabalapur
采用Suzuki偶联法设计合成了具有支化乙基己基增溶烷基链、末端为三氟甲基苯基的双酮吡咯（DPP）基有机半导体EH-DPP-TFP和EH-DPP-TFPV。这些化合物表现出高达700 nm的强吸收，薄膜形成特性敏感地依赖于溶剂和涂层条件。将这两种材料作为电子给体应用于以富勒烯为受体的体异质结和双层有机光伏（OPV）器件中，并对其性能进行了详细研究。在AM1.5G光照（100 mW cm−2）下，双层太阳能电池的最佳功率转换效率为：EH-DPP-TFPV与C60一起使用，经过热退火步骤诱导C60与供体材料的染料聚集和相互扩散。迄今为止，这是报道的简单双层OPV器件中效率最高的器件之一。
Diketopyrrolopyrrole (DPP)-based organic semiconductors EH-DPP-TFP and EH-DPP-TFPV with branched ethyl-hexyl solubilizing alkyl chains and end capped with trifluoromethyl phenyl groups were designed and synthesized via Suzuki coupling. These compounds show intense absorptions up to 700 nm, and thin film-forming characteristics that sensitively depend on the solvent and coating conditions. Both materials have been used as electron donors in bulk heterojunction and bilayer organic photovoltaic (OPV) devices with fullerenes as acceptors and their performance has been studied in detail. The best power conversion efficiency of 3.3% under AM1.5G illumination (100 mW cm−2) was achieved for bilayer solar cells when EH-DPP-TFPV was used with C60, after a thermal annealing step to induce dye aggregation and interdiffusion of C60 with the donor material. To date, this is one of the highest efficiencies reported for simple bilayer OPV devices.