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首页> 外文期刊>Advanced Functional Materials >Acceptor-Substituted S,N-Heteropentacenes of Different Conjugation Length: Structure-Property Relationships and Solar Cell Performance
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Acceptor-Substituted S,N-Heteropentacenes of Different Conjugation Length: Structure-Property Relationships and Solar Cell Performance

机译：不同共轭长度的受体取代的S，N-异戊烷：结构-性能关系与太阳能电池性能

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摘要

The synthesis, optoelectronic, and photovoltaic properties of novel acceptor-donor-acceptor (A-D-A) based -conjugated functional molecules 1-3, comprising a planar S,N-heteropentacene as central donor substituted with various terminal acceptor units, such as 1,1-dicyanovinylene (DCV) and 1-(1,1-dicyanomethylene)-cyclohex-2-ene (DCC), are reported. The structural variation of the end groups provides molecules 1-3 with gradually increased -conjugation due to a rising number of double bonds, which comes from the DCC unit(s). From optoelectronic investigation, structure-property relationships are deduced and the novel A-D-A heteropentacenes 1-3 are implemented as photoactive donor component in solution-processed bulk heterojunction solar cells together with [6,6]-phenyl-C-61-butyric acid methyl ester as acceptor. The structural variation in the S,N-heteropentacenes leads to clear trends in the photovoltaic performance and power conversion efficiencies of up to 4.9% are achieved. Furthermore, due to extension of the double bonds a clear trade-off between the open circuit voltage (V-OC) and the short circuit current density (J(SC)) values is observed. The role of additives on the optimization of the nanoscale morphology and device performance is investigated. The findings presented herein demonstrate that depending on the types of materials the additive may have significantly different effects on the active layer morphology and the device performance.
机译：基于新颖的受体-供体-受体（ADA）的共轭功能分子1-3的合成，光电和光电性质，包括平面S，N-杂戊并四烯作为中心供体，并被各种末端受体单元（例如1,1）取代报道了-二氰基亚乙烯基（DCV）和1-（1，1-二氰基亚甲基）-环己-2-烯（DCC）。端基的结构变化为分子1-3提供了逐渐增加的共轭，这归因于双键数目的增加，其来自DCC单元。通过光电研究，推导了结构-性质之间的关系，并将新型ADA杂戊并烯1-3与[6,6]-苯基-C-61-丁酸甲酯一起用作溶液处理的本体异质结太阳能电池中的光活性供体组分。作为接受者。 S，N-异戊烷的结构变化导致光伏性能出现明显趋势，并且功率转换效率高达4.9％。此外，由于双键的延伸，在开路电压（V-OC）和短路电流密度（J（SC））值之间可以清楚地权衡。研究了添加剂对优化纳米级形态和器件性能的作用。本文呈现的发现表明，取决于材料的类型，添加剂可能对有源层的形态和器件性能产生显着不同的影响。

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