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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >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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Visible up-conversion photoluminescence from IR diode-pumped SiO2–TiO2 nano-composite films heavily doped with Er3+–Yb3+ and Nd3+–Yb3+

机译：掺有Er3 + –Yb3 +和Nd3 + –Yb3 +的红外二极管泵浦的SiO2-TiO2纳米复合膜的可见上转换光致发光

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摘要

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+:Yb3. The results illustrate the large potential of this class of materials for photonic applications in optoelectronics devices.
机译：据报道，薄膜纳米复合材料具有有效的红外到可见光转换，其成分为90％SiO2-10％TiO2，通过旋涂溶胶-凝胶法制备，并与Er3 + Yb3 +和Nd3 +：Yb3 +离子共掺杂。在808 nm激光二极管激发下观察到转换过程，并产生绿色（526和550 nm）和红色（650 nm）发射：从前者发出，从蓝色（478 nm）和绿色（513和580 nm）发射。来自后者的排放。允许上转换的主要机制归因于Er3 +和Yb3 +离子在其激发态之间的能量转移。在掺有Er3 +：Yb3的样品中，红色发射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中的光子应用中具有巨大的潜力。

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