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首页> 外文期刊>Chemistry of Materials: A Publication of the American Chemistry Society >Enhanced Performance and Stability of Semitransparent Perovskite Solar Cells Using Solution-Processed Thiol-Functionalized Cationic Surfactant as Cathode Buffer Layer
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Enhanced Performance and Stability of Semitransparent Perovskite Solar Cells Using Solution-Processed Thiol-Functionalized Cationic Surfactant as Cathode Buffer Layer

机译：溶液处理的巯基官能化阳离子表面活性剂作为阴极缓冲层，可增强半透明钙钛矿太阳能电池的性能和稳定性

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摘要

We present a facile and effective method to enhance the performance and stability of perovskite solar cells (PSCs) by the incorporation of solution-processed thiol-functionalized cationic surfactant (11-mercaptoundecyl)trimethylammonium bromide (MUTAB) as cathode buffer layer (CBL). Our results indicate that the thiol function groups on MUTAB tend to react with the incident Ag atoms to form covalent Ag-S bonds, while no reaction is observed in the case of a methyl-functionalized counterpart dodecyltrirnethylammonium bromide (DTAB). Importantly, the presence of Ag-S bonding exerts rnultipositive effects on the interface, including decrease of contact resistance between the active layer and Ag electrode, improvement of ambient and thermal stability, and reduction of the percolation threshold of ultrathin Ag film. With these desired interfacial properties, the opaque device delivers high power conversion efficiency (PCE) up to 16.5%, which is superior to those of the devices with DTAB (7.9%) and state-of-the-art CBL ZnO nanopartides (11.0%). The application of MUTAB CBL in semitransparent (ST) solar cells using ultrathin (8 nm) Ag film as transparent top electrode is also demonstrated, and a remarkable PCE of 11.8% with a corresponding average visible transparency (AVT) of 20.8% is achieved, which represents the highest PCE ever reported for ST PSCs with similar AVT. More significantly, the resulting devices possess good ambient stability.
机译：我们提出了一种简便有效的方法，通过掺入溶液处理的巯基官能化阳离子表面活性剂（11-巯基癸基）溴化三甲基铵（MUTAB）作为阴极缓冲层（CBL），来增强钙钛矿太阳能电池（PSC）的性能和稳定性。我们的结果表明，MUTAB上的硫醇官能团倾向于与入射的Ag原子反应形成共价的Ag-S键，而在甲基官能化的对应的十二烷基三甲基乙基溴化铵（DTAB）的情况下未观察到反应。重要的是，Ag-S键的存在对界面产生了多种正效应，包括降低活性层与Ag电极之间的接触电阻，改善环境和热稳定性以及降低超薄Ag膜的渗透阈值。具有这些所需的界面特性，不透明的器件可提供高达16.5％的高功率转换效率（PCE），优于具有DTAB（7.9％）和最新的CBL ZnO纳米颗粒（11.0％）的器件。 ）。还展示了MUTAB CBL在使用超薄（8 nm）Ag膜作为透明顶部电极的半透明（ST）太阳能电池中的应用，并获得了11.8％的显着PCE和相应的20.8％的平均可见光透明性（AVT），它代表了具有类似AVT的ST PSC所报告的最高PCE。更重要的是，所得装置具有良好的环境稳定性。

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