Lewis Acid Doping Induced Synergistic Effects on Electronic and Morphological Structure for Donor and Acceptor in Polymer Solar Cells,Advanced Energy Materials

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Lewis Acid Doping Induced Synergistic Effects on Electronic and Morphological Structure for Donor and Acceptor in Polymer Solar Cells
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-03-29 , DOI: 10.1002/aenm.201703672
Han Yan ₁ , Jianya Chen ₁ , Ke Zhou _{1,

2} , Yabing Tang ₁ , Xiangyi Meng ₁ , Xianbin Xu ₁ , Wei Ma ₁

Affiliation

Due to the attraction of optimizing the electronic structure beyond chemical synthesis, molecular doping has recently aroused wide interest in the field of organic solar cells. However, the selection of limited dopants confines its successful application. Inspired by the Lewis base characteristics of the photovoltaic materials, the Lewis acid as novel dopant is introduced in organic solar cells. In both fullerene and nonfullerene based blends, Lewis acid doping leads to increased photovoltaic performance. Detailed experiments reveal that Lewis acid doping has a synergistic effect on modifying the polymer's electronic properties and the acceptor's nanostructure even at low doping concentration, and these are simultaneously responsible for the device improvements. Based on the mechanism studies, it is proposed that the Lewis acid‐doped polymers anions produce induced dipole on the acceptor, this increases the intermolecular interaction and facilitates the morphology optimization. It is believed that the synergistic effect by Lewis acid doping greatly expands the application of doped organic solar cells, in concert with other existing methods to yield higher efficiency values.

中文翻译：

路易斯酸掺杂对聚合物太阳能电池供体和受体的电子和形态结构产生协同作用

由于优化化学结构以外的电子结构的吸引力，最近，分子掺杂引起了有机太阳能电池领域的广泛兴趣。然而，有限掺杂剂的选择限制了其成功的应用。受光伏材料的路易斯碱特性的启发，将路易斯酸作为新型掺杂剂引入了有机太阳能电池。在富勒烯和非富勒烯基共混物中，路易斯酸掺杂导致光伏性能提高。详细的实验表明，路易斯酸掺杂即使在低掺杂浓度下，对改变聚合物的电子性能和受体的纳米结构也具有协同作用，而这些同时也有助于器件的改进。根据机理研究，有人提出，路易斯酸掺杂的聚合物阴离子会在受体上产生诱导的偶极子，从而增加了分子间的相互作用并促进了形态优化。据信路易斯酸掺杂的协同作用极大地扩展了掺杂有机太阳能电池的应用，与其他现有方法相结合以产生更高的效率值。

更新日期：2018-03-29

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