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Enhancing upconversion emission of Yb3+-Er3+ co-doped NaYF4 by doping TiO2

机译:掺杂TiO2增强Yb3+-Er3+共掺杂NaYF4的上转换发射

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摘要

Different concentrations of TiO2 co-doped NaYF4: 15 Yb3+, 2 Er3+ powder phosphors were synthesized by the high temperature solid state reaction process. The samples were investigated by X-ray diffraction, scanning electron microscopy and photoluminescence testing. The results show that, under the 980 nm excitation, the NaYF4: 15 Yb3+, 2 Er3+, x TiO2 (x = 0, 1, 5, 7, 10) composite shows several emission peaks at 521, 540, and 655 nm. With the increase of doping TiO2 that the luminescence intensities of both Yb3+ and Er3+ emission increase firstly, and reach a maximum at 1 mol TiO2, and then get suppressed with the further increase of TiO2 doping. Our results suggest that, for Yb3+-Er3+ co-doped NaYF4 with doping TiO2, there will be a high potential in application of novel light conversion devices, especially in solar cells.
机译:采用高温固相反应法合成了不同浓度的TiO2共掺杂NaYF4:15%Yb3+、2%Er3+粉末荧光粉。通过X射线衍射、扫描电子显微镜和光致发光测试对样品进行了研究。结果表明,在980 nm激发下,NaYF4: 15 % Yb3+, 2 % Er3+, x % TiO2 (x = 0, 1, 5, 7, 10)复合材料在521、540和655 nm处均出现多个发射峰。随着TiO2掺杂量的增加,Yb3+和Er3+发射的发光强度首先增加,在1 mol%TiO2时达到最大值,然后随着TiO2掺杂的进一步增加而受到抑制。研究结果表明,对于掺杂TiO2的Yb3+-Er3+共掺杂NaYF4,新型光转换器件在太阳能电池中的应用潜力巨大。

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