980 nm upconversion luminescence from oxy-fluoride glasses and glass-ceramics doped with Yb^3 +and Er^3 + ions

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• 作者：Jihong Zhang ; Jong Heo
• 关键词：Infrared upconversion emission ; Oxy-fluoride ; Rare earth ; Glass ceramics ; Solar cell efficiency
• 刊名：Journal of Non-Crystalline Solids
• 出版年：1 January, 2014
• 年：2014
• 卷：383
• 期：Complete
• 页码：188-191
• 全文大小：593 K

文摘

Infrared upconversion luminescence properties of Er^3 +/Yb^3 + co-doped oxy-fluoride glasses and glass-ceramics were investigated. Under 1550 nm laser excitation, infrared emission centered at ~ 980 nm that originated from the Yb^3 +: ²F_5/2 鈫?#xA0;²F_7/2 and Er^3 +: ⁴I_11/2 鈫?#xA0;⁴F_15/2 transitions was observed. The upconversion luminescence was enhanced both by Yb^3 + content increase and by precipitation of 尾-PbF₂ nano-crystals in the glass matrix. The energy transfer process between Yb^3 + and Er^3 + ions dominated IR upconversion emission, and Yb^3 + can be used as energy acceptor. The strong upconverted luminescence can be used to increase the efficiency of silicon solar cells.