摘要
采用高温固相反应法合成Er3+∶Ca Mo O4多晶料,通过坩埚下降法生长出1mol%Er3+掺杂Ca Mo O4单晶;应用X射线粉末衍射证实了晶体材料的结晶物相,测试了退火前后单晶试样的透射光谱、吸收光谱、上转换荧光光谱和近红外荧光光谱,应用Judd-Ofelt理论计算了Er3+∶Ca Mo O4晶体的光谱性能参数。研究表明,在980 nm激发光源作用下,从单晶试样获得较强的上转换绿色荧光发射,且呈现以1535 nm为中心波长的较宽荧光发射;经空气氛退火处理单晶试样的光学透过性得以改善,其上转换荧光发射和近红外荧光发射也得以明显增强。
Er3＋doped CaMoO4 polycrystalline material was prepared by solid-state reaction method at elevated temperature. 1 mol% Er3＋-doped CaMoO4 single crystal was grown by vertical Bridgman method. The crystalline phase of as-prepared materials were verified by X-ray powder diffraction. The spectral properties of unannealed and annealed crystal samples, such as transmission spectra, absorption spectra, up-conversion fluorescence spectra and near-infrared fluorescence spectra, were measured systematically. The spectral parameters of Er 3＋ -doped CaMoO4 crystal were calculated based on the Judd- Ofeh theory. Under 980 nm photonic excitation, a strong up-conversion fluorescence emission with green colour and a wide near-infrared fluorescence emission with the central wavelength of 1535 nm were observed. By means of the annealing treament in air atomosphere, the optical transmittance of the annealed crystal sample can be improved and the up-conversion fluorescence emission and the near- infrared fluorescence emission are also enhanced obviously.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2015年第10期2626-2631,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(21171102)
973计划前期研究专项(2011CB612306)
宁波大学王宽城幸福基金
