氧化石墨烯/硒化锌纳米光电材料的制备及其蓝光发射特性

摘要

采用一种简单有效的原位水热合成方法，使用石墨烯氧化物( GO)作为反应物和晶体生长基底成功制备出了还原氧化石墨烯/硒化锌( r-GO/ZnSe)纳米复合材料。采用X射线粉末衍射( XRD)、透射电子显微镜( TEM)、高分辨透射电镜( HRTEM)以及红外-可见光谱( FT-IR)等方法对r-GO/ZnSe纳米复合材料进行了检测。结果表明，平均粒径在30 nm的立方闪锌矿晶体结构的ZnSe粒子均匀分散在氧化石墨烯片层上，构成纳米复合结构。UV-Vis光谱显示，纳米复合材料的光学吸收的起始波长在445 nm附近。 PL光谱显示，纳米复合材料在470 nm附近存在一个很强的发射峰。这种石墨烯基纳米复合材料在白光二极管领域中有重要的应用价值。%Reduced graphene oxide-ZnSe ( r-GO/ZnSe ) nanocomposites were successfully synthe-sized by an easy hydrothermal method. This process used the graphene oxide nanosheets as disper-sant and two-dimensional growth template for ZnSe, resulting in the in situ formation of ZnSe nanop-articles on graphene oxide nanosheets and subsequent reduction of graphene oxide to r-GO. The samples were characterized by XRD, TEM, and FT-IR. The results show that the cubic ZnSe nano-particles with the mean size of 30 nm distribute on r-GO sheets to form compact composites. UV-Vis absorption spectra indicate that the absorption edge of r-GO/ZnSe is at about 445 nm. PL spectra show a strong emission peak at 470 nm excited by 430 nm. The obtained r-GO/ZnSe nanocomposites may play important role in white LED field.