摘要
采用溶胶-凝胶法在Zn2SiO4基质中掺杂Eu3+,合成了红色荧光粉Zn2SiO4∶Eu3+。通过样品的X射线衍射光谱、红外光谱、扫描电镜以及光致发光光谱的测试和表征,研究了Zn2SiO4∶Eu3+的内部结构和发光特性。扫描电镜结果显示样品为球状荧光粉,颗粒直径为1~3μm。在395 nm激发下,样品在613 nm处发射出很强的红光。结合荧光光谱,分析了样品的退火温度,Eu3+的浓度,电荷补偿剂Li+的浓度对样品发光强度的影响。研究发现,红色荧光粉Zn2SiO4∶Eu3+的发光强度随退火温度的升高而增加,发光强度随Eu3+和Li+浓度的增加先增大后减小。
pherical Zn2SiO4∶Eu3＋ phosphors were prepared by a Pechini sol-gel process.The microstructure and luminescent properties of the obtained Zn2SiO4∶Eu3＋ particles were well characterized by X-ray diffraction（XRD）,Fourier transform infrared spectroscopy（FTIR）,scanning electron microscopy （SEM）,energy-dispersive X-ray spectroscopy（EDS） and photoluminescence（PL） spectra.The results of SEM demonstrated that the Zn2SiO4∶Eu3＋ particles with a diameter about 1～3 μm,which have spherical morphology,emitted an intensive red light emission at 613 nm under excitation at 395 nm.Besides,the effects of the Eu3＋ concentration,annealing temperature and charge compensators of Li＋ ions on the PL emission intensities were investigated in detail.The investigation showed that the PL intensity increased with the annealing temperature increasing.At the same time,the PL intensity firstly increased and then decreased with the Eu3＋ and Li＋ concentration increasing.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2011年第4期890-893,共4页
Spectroscopy and Spectral Analysis
基金
国家杰出青年科学基金项目(60825407)
国家自然科学基金项目(60877025)
北京市自然科学基金项目(2092024)
北京市科学委员会基金项目(Z08000303220803)
国家(973计划)项目(2011CB932700)
北京市教育委员会共建项目资助
