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机构地区:[1]同济大学物理系,上海200092 [2]同济大学材料科学与工程学院,上海200092
出 处:《材料导报》2011年第4期53-56,共4页Materials Reports
摘 要: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.
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