Ye Song, Jiang Nan, He Feng, Liu Xiaofeng, Zhu Bin, Teng Yu, Qiu Jian Rong
State Key Laboratory of Silicon Materials, Zhejiang University Hangzhou, China.
Opt Express. 2010 Jan 18;18(2):639-44. doi: 10.1364/OE.18.000639.
The ZnO-LiYbO(2) hybrid phosphors were sintered by the solid-state reaction method, in which the intense near-infrared emission around 1000 nm due to Yb(3+ 2)F(5/2)-->(2)F(7/2) transition was obtained due to the efficient energy transfer from ZnO to Yb(3+) ions. The growth of the LiYbO(2) crystal and the formation of the diffusion layer between LiYbO(2) and ZnO were confirmed by XRD, SEM and EDX studies. The high efficient energy transfer is benefited from the inter-diffusion of Li(+), Yb(3+) and Zn(2+) in the diffusion region. The spectroscopy results clearly indicated that the ZnO-LiYbO(2) hybrid phosphors can harvest the energy from near-UV photons in a broad wavelength region and effectively convert them into Yb(3+) near-infrared emission.
通过固态反应法烧结了ZnO-LiYbO₂混合荧光粉，由于从ZnO到Yb³⁺离子的有效能量转移，获得了因Yb³⁺的²F₅/₂→²F₇/₂跃迁而产生的1000nm左右强烈的近红外发射。通过XRD、SEM和EDX研究证实了LiYbO₂晶体的生长以及LiYbO₂与ZnO之间扩散层的形成。高效能量转移得益于扩散区域中Li⁺、Yb³⁺和Zn²⁺的相互扩散。光谱结果清楚地表明，ZnO-LiYbO₂混合荧光粉可以在较宽的波长区域收集近紫外光子的能量，并有效地将它们转换为Yb³⁺近红外发射。
