Yb^(3+)和Er^(3+)共掺ZnF_2-AlF_3-PbF_2-LiF多晶和玻璃的光谱性质

研究了 978nmLD激发下Yb3 + ,Er3 + 共掺新的氟化物基质 30ZnF2 2 5AlF3 30PbF2 1 5LiF多晶和玻璃中的上转换发光性质 ,分析了上转换发光的途径 ,重点讨论了多晶样品中红色上转换发光增强的过程和原因。最后解释了Er3 + 和Yb3 +

Upconversion Luminescence of Er^3＋ and Co-Doped Er^3＋/Yb^3＋ Novel Transparent Oxyfluoride Glasses and Glass Ceramics： Spectral and Structural Properties

Transparent oxyfluoride silicate precursor glasses and glass ceramics with the novel composition （1） SiO2-PbO-PbFE-Er2O3, （2） SiO2-GeOE-PbO-PbFE-Er2O3 （3） SiO2-Al2O3-Y2O3-Na2O-NaF-LiF-Er2O3-YbF3 doped with Er^3＋ and co-doped with Er^3＋/Yb^3＋ ions were synthesized. X-ray diffraction analysis （XRD） and Er3＋ absorption spectra revealed precipitation of PbF2 nanocrystals dispersed in the glassy matrix. Under 980 nm laser excitation, intense green, red and near IR bands of upconversion luminescence （UCL） were recorded both before and after heat treatment. In the glass ceramics the upconversion intensity increased significantly. To our knowledge, for the first time the composition of the glass ceramics characterized by the small-angle neutron scattering （SANS） showed the cluster organization of PbF2 nanocrystals.