Visible up-conversion photoluminescence from IR diode-pumped SiO2-TiO2 nano-composite films heavily doped with Er3+-Yb3+ and Nd3+-Yb3+
Visible up-conversion photoluminescence from IR diode-pumped SiO2-TiO2 nano-composite films heavily doped with Er3+-Yb3+ and Nd3+-Yb3+
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DOI：
10.1016/j.jnoncrysol.2007.01.043
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发表时间：
2007-06-15
影响因子：
3.5
通讯作者：
Battisha, I. K.
中科院分区：
文献类型：
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作者：
Battisha, I. K.
采用旋涂溶胶-凝胶法制备了掺杂Er3+、Yb3+和Nd3+：Yb3+的二氧化钛含量为90%~10%的薄膜纳米复合材料，实现了红外-可见光的高效转换。在808 nm激光二极管激发下观察到转换过程，并导致产生绿色(526和550 nm)和红色(650 Nm)发射：前者产生蓝色(478 Nm)和绿色(513和580 nm)发射。实现上转换的主要机制是Er3+和Yb3+离子在激发态之间的能量传递。在掺Er3+：Yb-3的样品中，红光的上转换效率占主导地位。结果表明，这类材料在光电子器件的光子应用方面具有很大的潜力。(C)2007 Elsevier B.V.保留所有权利。
Efficient infrared-to-visible conversion is reported in thin film nano-composites, with composition 90% SiO2-10% TiO2, fabricated by a spin-coating sol-gel route and co-doped with Er3+ Yb3+ and with Nd3+ :Yb3+ ions. The conversion process is observed under 808 nm laser diode excitation and results in the generation of green (526 and 550 nm) and red (650 nm) emissions: from the former, and blue (478 nm) and green (513 and 580 nm) emissions from the latter. The main mechanism that allows for up-conversion is ascribed to energy transfer among Er3+ and Yb3+ ions in their excited states. Up-conversion efficiency for red emission predominates in samples doped with Er3+ :Yb-3. The results illustrate the large potential of this class of materials for photonic applications in optoelectronics devices. (c) 2007 Elsevier B.V. All rights reserved.