Liu Yongsheng, Luo Wenqin, Li Renfu, Chen Xueyuan
Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
J Nanosci Nanotechnol. 2010 Mar;10(3):1871-6. doi: 10.1166/jnn.2010.2140.
Hexagonal Nd(3+)-doped ZnO nanocrystals with multiple luminescent centers were synthesized by means of a facile sol-gel method. The Nd(3+)-doped ZnO nanocrystals were characterized by using the X-ray diffraction, transmission electron microscopy, ultraviolet-visible reflectance spectra, and fluorescence spectroscopy. Host-to-Nd3+ energy transfer was observed for the first time in Nd(3+)-doped ZnO nanocrystals. It was found that Nd3+ ions can be effectively sensitized by the ZnO nanocrystals, resulting in sharp and intense characteristic Nd3+ luminescence. The photoluminescence (PL) and PL excitation spectra of Nd3+ ions in the ZnO nanocrystals were investigated in detail. Furthermore, the possible mechanism of host-to-Nd3+ energy transfer was also proposed on the basis of the optical properties of Nd3+ ions in the ZnO nanocrystals.
采用简便的溶胶-凝胶法合成了具有多个发光中心的六方Nd(3+)掺杂ZnO纳米晶体。利用X射线衍射、透射电子显微镜、紫外-可见反射光谱和荧光光谱对Nd(3+)掺杂ZnO纳米晶体进行了表征。首次在Nd(3+)掺杂ZnO纳米晶体中观察到从主体到Nd3+的能量转移。发现Nd3+离子可被ZnO纳米晶体有效敏化，从而产生尖锐且强烈的Nd3+特征发光。详细研究了ZnO纳米晶体中Nd3+离子的光致发光(PL)和PL激发光谱。此外，还根据Nd3+离子在ZnO纳米晶体中的光学性质提出了从主体到Nd3+能量转移的可能机制。
