铒单掺和铒/镱共掺氟氧玻璃的上转换发光性质研究

Investigation on the Up-conversion Luminescence of Er^(3+) Doped and Er^(3+)/Yb^(3+) Co-doped Fluoride-oxy Glasses

研究了室温下掺不同摩尔分数Er3+单掺和Er3+/Yb3+双掺的20GaF3-15InF3-17CdF2-15ZnF2-10SnF2-3P2O5-(20-x-y)PbF2-xErF3-yYbF3(x=0.1~0.4,y=1~4)氟氧玻璃的上转换发光性质。755nm激发下,在Er3+单掺系列玻璃中观察到紫色(410nm)、蓝色(465nm)和绿色(522nm、544nm)上转化发光,随着掺杂Er3+浓度的增大,各荧光强度增幅有变缓的趋势。980nm激发下,由于Yb3+的敏化作用,在Er3+/Yb3+双掺系列玻璃中观察到绿色(548nm、527nm)和红色(661nm)上转换发光,固定Er3+浓度,随着Yb3+浓度的增大,各荧光强度先增大后减小,当Yb3+、Er3+掺杂浓度比为15时发光强度最大。该氟氧玻璃具有比氟化物玻璃更好的抗析晶稳定性,掺稀土离子后在不同波长激发下可观察到明亮的红、绿色上转换荧光,是一种有潜质用于红、绿色上转换发光的材料。

The up-conversion luminescence of 20GaFa-15InFa-17CdF2 15ZnF2-10SnF2-3P2O5-（20-x- y）- PbF2 -xErF3-yYbF3 （x= 0. 1 - 0. 4, y = 1 - 4 ） glasses with different Er^3＋ and Yb^3＋ concentration were researched. When excited at 755nm, purple（410nm）, blue（465nm） and green（522nm, 544nm） emissions were observed. With the concentration increasing of Er^3＋ , the trend of luminescence increase slowed. When excited at 980nm, green（548nm, 527nm） and red （661nm） emissions were observed through energy transfer. Fixed Er^3＋ concentration, with the Yb^3＋ concentration increased, the fluorescence intensity increased first and then decreased. When the Er^3＋ , Yb^3＋ doping molar concentration ratio was 15, the greatest luminous intensity was obtained. This fluoride-oxy glass has a better anti-crystallization stability than fluoride glass and a bright red and green up-conversion luminescence when excited at different wavelength. It is a promising material for the red and green up-conversion luminescence.