Cooperative Assembly Donor–Acceptor System Induced by Intermolecular Hydrogen Bonds Leading to Oriented Nanomorphology for Optimized Photovoltaic Performance
Cooperative Assembly Donor–Acceptor System Induced by Intermolecular Hydrogen Bonds Leading to Oriented Nanomorphology for Optimized Photovoltaic Performance
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DOI：
10.1021/jp207704u
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发表时间：
2012-01
影响因子：
3.7
通讯作者：
Kai Yao;Lie Chen;Fan Li;Peishan Wang;Yiwang Chen
中科院分区：
文献类型：
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作者：
Kai Yao;Lie Chen;Fan Li;Peishan Wang;Yiwang Chen
为了构建具有自组装纳米级形貌的高阶超分子并稳定聚合物光伏电池的膜形态，采用格氏还原法合成了区域规则聚{[3-（6′-溴己基）噻吩]-co-[[3-（6′-（1-咪唑）己基）噻吩]}（P3HTM）。通过设计合适的含咪唑环的给体分子和含羧酸的受体分子来进行分子间相互作用，可以控制分子间氢键引起的配合物堆积。P3HTM:PCBA在极性添加剂溶剂中的红移吸收和淬灭光致发光结果表明，P3HTM:PCBA是通过氢键相互作用形成的，这与原子力显微镜图像中的纳米纤维结构域一致。与此形成鲜明对比的是，通过协同自组装构建的P3HTM和PCBA配合物的热退火处理表现出最佳的光伏性能，Jsc为9.11 mA cm -…
A regioregular poly{[3-(6′-bromohexyl)thiophene]-co-[[3-(6′-(1-imidazole) hexyl)thiophene]} (P3HTM) is synthesized via the Grignard metathesis route for the purpose of constructing higher-order supramolecules with self-assembly nanoscale morphology and stabilizing the film morphology in polymer photovoltaic cells. By designing the donor molecules containing imidazole rings and acceptor including carboxylic acids properly for the intermolecular interaction, one can control the complexes stacking induced by the intermolecular hydrogen bonds. The results from red-shifted absorption and enhanced quenching photoluminescence of the P3HTM:PCBA in solvents with polar additives indicate the building blocks through hydrogen-bonding interactions, which is consistent with the nanofibers domains in atomic force microscopy images. In strong contrast, processing of P3HTM and PCBA complexes with heat-annealing, constructed from cooperative self-assembly, shows optimized photovoltaic performance, with a Jsc of 9.11 mA cm–...