Chuang Ming-Kai, Yang Shun-Shing, Chen Fang-Chung
Department of Photonics, National Chiao Tung University, Hsinchu 30010, Taiwan.
Materials (Basel). 2015 Aug 21;8(8):5414-5425. doi: 10.3390/ma8085252.
Atomically thin two-dimensional (2D) transition metal dichalcogenides have also attracted immense interest because they exhibit appealing electronic, optical and mechanical properties. In this work, we prepared gold nanoparticle-decorated molybdenum sulfide (AuNP@MoS2) through a simple spontaneous redox reaction. Transmission electron microscopy, UV-Vis spectroscopy, and Raman spectroscopy were used to characterize the properties of the AuNP@MoS2 nanomaterials. Then we employed such nanocomposites as the cathode buffer layers of organic photovoltaic devices (OPVs) to trigger surface plasmonic resonance, leading to noticeable enhancements in overall device efficiencies. We attribute the primary origin of the improvement in device performance to local field enhancement induced by the effects of localized surface plasmonic resonance. Our results suggest that the metal nanoparticle-decorated two-dimensional materials appear to have great potential for use in high-performance OPVs.
原子级薄的二维（2D）过渡金属二硫属化物也引起了极大的兴趣，因为它们展现出吸引人的电子、光学和机械性能。在这项工作中，我们通过简单的自发氧化还原反应制备了金纳米颗粒修饰的硫化钼（AuNP@MoS2）。利用透射电子显微镜、紫外可见光谱和拉曼光谱对AuNP@MoS2纳米材料的性能进行了表征。然后，我们将这种纳米复合材料用作有机光伏器件（OPV）的阴极缓冲层，以触发表面等离子体共振，从而使整个器件的效率得到显著提高。我们将器件性能提高的主要原因归因于局部表面等离子体共振效应引起的局部场增强。我们的结果表明，金属纳米颗粒修饰的二维材料在高性能有机光伏器件中似乎具有巨大的应用潜力。
