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Melamine-Doped Cathode Interlayer Enables High-Efficiency Organic Solar Cells
ACS Energy Letters ( IF 22.0 ) Pub Date : 2021-09-16 , DOI: 10.1021/acsenergylett.1c01730
Xia Xiong 1 , Xiaonan Xue 2 , Ming Zhang 2 , Tianyu Hao 2 , Zhiyue Han 1 , Yueyang Sun 1 , Yongming Zhang 2 , Feng Liu 2 , Supeng Pei 1 , Lei Zhu 2
Affiliation  

Charge transport, extraction, and collection play important roles in the working process of organic solar cells (OSCs), and the interface engineering is one of the key factors to realize the high-throughput printing fabrication of OSCs. The structure design or doping of electrode interlayer materials can effectively suppress the recombination of carriers at the interface and improve the ohmic contact between the active layer and the electrodes, which is a useful method to achieve a high power conversion efficiency (PCE). Poly(9,9-bis(3′-(N,N-dimethyl)-N-ethylammoniumpropyl-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene))dibromide (PFN-Br) is a widely used alcohol-soluble cathode interlayer material. By doping PFN-Br with melamine (MA), the charge extraction efficiency and nongeminate recombination at the cathode interface are successfully optimized. Finally, the device efficiencies of PM6:Y6 and PM6:BTP-eC9 are increased to an amazing 17.44% and 18.58%, respectively. This work provides a new strategy for the fabrication of high-efficiency OSCs.

中文翻译:

三聚氰胺掺杂阴极中间层使高效有机太阳能电池成为可能

电荷传输、提取和收集在有机太阳能电池(OSCs)的工作过程中起着重要作用,界面工程是实现 OSCs 高通量打印制造的关键因素之一。电极夹层材料的结构设计或掺杂可以有效抑制界面处载流子的复合,改善有源层与电极之间的欧姆接触,是实现高功率转换效率(PCE)的有用方法。聚(9,9-双(3'-( N , N-二甲基) -N-乙基铵丙基-2,7-芴) -alt-2,7-(9,9-二辛基芴))二溴化物(PFN-Br)是一种广泛使用的醇溶性阴极夹层材料。通过用三聚氰胺 (MA) 掺杂 PFN-Br,成功优化了阴极界面处的电荷提取效率和非偶合复合。最后,PM6:Y6 和 PM6:BTP-eC9 的器件效率分别提高到惊人的 17.44% 和 18.58%。这项工作为制造高效 OSC 提供了一种新策略。
更新日期:2021-10-08
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