Abstract

Polydopamine (PDA)-coated gold nanoparticles (Au@PDA) were used as electronic transport layer (ETL) modifiers in PTB7:PC71BM polymer solar cells. PDA can effectively modify the surface of gold nanoparticles (Au NPs) and improve the stability of them. In addition, PDA also effectively binds to ZnO ETL, reducing surface defect and improving the combination between the interface layer and the active layer. In this study, AuNPs with particle size of about 30 nm was prepared by Frens reduction method, and then the dopamine (DA) self-polymerized on the surface of them to obtain a core–shell structural material Au@PDA. By regulating the polymerization time of DA, different PDA shell thickness was obtained. The Au@PDA was introduced into ZnO ETL to generate local plasmon resonance adsorption. When dopamine polymerized for an hour, the short current density of the modified solar cells reached 13.98 mA/cm², and the power conversion efficiency reached 6.03%, which was 130% of the device without Au@PDA.

中文翻译：

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聚多巴胺涂层金纳米颗粒用作PTB7：PC 71 BM聚合物太阳能电池电子传输层的改性剂

摘要

聚多巴胺（PDA）包覆的金纳米粒子（Au @ PDA）在PTB7：PC71BM聚合物太阳能电池中用作电子传输层（ETL）改性剂。PDA可以有效地修饰金纳米颗粒（Au NPs）的表面并提高其稳定性。此外，PDA还可以有效地与ZnO ETL结合，从而减少表面缺陷并改善界面层和有源层之间的结合。在这项研究中，通过Frens还原法制备了粒径约为30 nm的AuNP，然后多巴胺（DA）在其表面上自聚以获得核壳结构材料Au @ PDA。通过调节DA的聚合时间，获得了不同的PDA壳厚度。将Au @ PDA引入ZnO ETL中以产生局部等离振子共振吸附。多巴胺聚合一个小时后，^{如图2所示}，功率转换效率达到6.03％，是没有Au @ PDA的设备的130％。