Department of Photonics and Display Institute, National Chiao Tung University, Hsinchu 30010, Taiwan.
Nanoscale. 2014;6(3):1573-9. doi: 10.1039/c3nr05077g.
In this work, gold nanoparticle/graphene oxide (AuNP/GO) nanocomposites are synthesized and used as anodic buffer layers in organic photovoltaic devices (OPVs). The application of thiol-terminated polyethylene glycol as a capping agent prevents the aggregation of AuNPs on the GO surface and further improves the solubility and stability of these nanomaterials in solutions. When AuNP/GO nanomaterials served as the buffer layers, they introduced localized surface plasmon resonance (LSPR) in the OPVs, leading to noticeable enhancements in the photocurrent and the efficiencies of the OPVs. We attribute the primary origin of the improvement in device performance to local field enhancement induced by the LSPR. We anticipate that this study might open up new avenues for constructing plasmon-enhancing layers on the nanoscale to improve the performance of solar cells.
在这项工作中，金纳米粒子/氧化石墨烯（AuNP/GO）纳米复合材料被合成并用作有机光伏器件（OPVs）的阳极缓冲层。巯基封端的聚乙二醇作为封端剂的应用可防止 AuNP 在 GO 表面聚集，并进一步提高这些纳米材料在溶液中的溶解度和稳定性。当 AuNP/GO 纳米材料作为缓冲层时，它们在 OPVs 中引入了局域表面等离子体共振（LSPR），导致 OPVs 的光电流和效率显著提高。我们将器件性能的提高归因于 LSPR 引起的局部场增强。我们预计，这项研究可能为在纳米尺度上构建增强等离子体的层开辟新途径，以提高太阳能电池的性能。
