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Intensification of Vertical Phase Separation for Efficient Polymer Solar Cell via Piecewise Spray Assisted by a Solvent Driving Force
Solar RRL ( IF 6.0 ) Pub Date : 2020-01-16 , DOI: 10.1002/solr.201900458 Jiang Cheng 1 , Shenghao Wang 2 , Yang Tang 1 , Rong Hu 1 , Xingwu Yan 1 , Zhen Zhang 1 , Lu Li 1 , Qibing Pei 3
Solar RRL ( IF 6.0 ) Pub Date : 2020-01-16 , DOI: 10.1002/solr.201900458 Jiang Cheng 1 , Shenghao Wang 2 , Yang Tang 1 , Rong Hu 1 , Xingwu Yan 1 , Zhen Zhang 1 , Lu Li 1 , Qibing Pei 3
Affiliation
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Piecewise spray has the advantage of controlling the component distribution, i.e., constructing vertical phase‐separated active layers, to improve the charge generation efficiency of large‐scale polymer solar cells. However, it brings a connection problem because of the drastic difference in the donor/acceptor ratio of continuous coatings using the conventional solvent. Assisted by 1,3,5‐trimethylbenzene‐based solvent engineering, a solvent driving force is formed, resulting in a continuous interface for piecewise spray‐coated active layers. The blend film forms a bicontinuous interpenetrating network in the active layer and provides efficient percolation pathways for charge carrier transport, resulting in a considerable improvement in the photovoltaic performance. When the donor/acceptor ratio is 1:2 in the first coating and 2:1 in the second coating, and the thickness of each coating is 90 nm, the performance of the PBDB‐T‐2Cl:IT4F photovoltaic device shows a notable conversion efficiency of 12.29% with a high short‐circuit current density of 21.55 mA cm−2. Importantly, this piecewise spray technique can be used for large‐scale module fabrication.
中文翻译：
溶剂驱动力辅助分段喷雾强化高效聚合物太阳能电池的垂直相分离
分段喷涂的优点是控制组件的分布，即构造垂直相分离的有源层，以提高大型聚合物太阳能电池的电荷产生效率。然而，由于使用常规溶剂的连续涂层的施主/受主比率的巨大差异，这带来了连接问题。在1,3,5-三甲基苯基溶剂工程的辅助下，形成了溶剂驱动力，从而形成了分段喷涂活性层的连续界面。共混膜在活性层中形成双连续互穿网络，并为载流子传输提供有效的渗透途径，从而大大改善了光伏性能。当第一涂层中供体/受体比例为1：2且2：2时−2。重要的是，这种分段喷涂技术可用于大规模模块制造。
更新日期：2020-01-16
中文翻译：
溶剂驱动力辅助分段喷雾强化高效聚合物太阳能电池的垂直相分离
分段喷涂的优点是控制组件的分布，即构造垂直相分离的有源层，以提高大型聚合物太阳能电池的电荷产生效率。然而，由于使用常规溶剂的连续涂层的施主/受主比率的巨大差异，这带来了连接问题。在1,3,5-三甲基苯基溶剂工程的辅助下，形成了溶剂驱动力，从而形成了分段喷涂活性层的连续界面。共混膜在活性层中形成双连续互穿网络，并为载流子传输提供有效的渗透途径，从而大大改善了光伏性能。当第一涂层中供体/受体比例为1：2且2：2时−2。重要的是，这种分段喷涂技术可用于大规模模块制造。
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