Department of Physics and Center of Materials Physics and Chemistry, Beihang University, Beijing 100191, P.R. China.
Phys Chem Chem Phys. 2014 Mar 14;16(10):4544-50. doi: 10.1039/c3cp54830a.
Mn-doped ZnO-ZnS complex nanocrystals were fabricated through coating of dodecanethiol on Mn-doped ZnO nanocrystals. The relationship between the component of white light emission and the coordination environments of Mn-dopants were experimentally investigated. It was shown that Mn ions mainly formed Mn(3+)O6 octahedra in as prepared Mn-doped ZnO, while the Mn(3+) ions on the surface of ZnO transferred into Mn(2+) ions at the interface between ZnO and ZnS after dodecanethiol coating. The Mn(2+)S4 tetrahedron density and the orange emission intensity increased upon enhancing the dodecanethiol content. These results provide an alternative way to optimize the white emission spectrum from nanocrystals of Mn-doped ZnS-ZnO complex structures through modulation of the coordination environment of Mn ions.
通过在 Mn 掺杂 ZnO 纳米晶上包覆正十二硫醇，制备了 Mn 掺杂 ZnO-ZnS 复合纳米晶。实验研究了白光发射的组成与 Mn 掺杂剂配位环境之间的关系。结果表明，Mn 离子在制备的 Mn 掺杂 ZnO 中主要形成 Mn(3+)O6 八面体，而 ZnO 表面的 Mn(3+)离子在正十二硫醇包覆后，在 ZnO 和 ZnS 之间的界面处转变成 Mn(2+)离子。随着正十二硫醇含量的增加，Mn(2+)S4 四面体密度和橙色发射强度增加。这些结果为通过调节 Mn 离子的配位环境来优化 Mn 掺杂 ZnS-ZnO 复合结构纳米晶的白光发射光谱提供了一种替代方法。
