The crystallophores of the composition Sr2La8(1x-y)ErxYbyGe6O26 (x = 0.01, 0.05, 0.075, 0.1, 0.15) were synthesized. Nanophosphores in the amorphous state were obtained for the first time by the method of pulsed electron beam evaporation using a phosphor of the composition Sr2La7.85Er0.075Yb0.075Ge6O26 with the structure of oxyapatites as a target. DSC-TGA analysis was performed to determine the temperature stability and the onset of crystallization of the nanosample. A change in the Raman spectra of the samples with a decrease in the particle dimension from the bulk to nanoscale state was found. The spectral characteristics of the upconversion photoluminescence of samples in polycrystalline and nano-amorphous states are studied. It has been shown that luminescence is influenced by nonradiative processes between different transitions of Er3+ ions. There is a threshold population of the Er3+ and Yb3+ levels (level 2F5/2) in the region of relatively low pumping powers of nanosamples by laser radiation with a wavelength of λex = 980 nm. Above this threshold a sharp increase in the intensity of upconversion photoluminescence occurs.

中文翻译：

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由 Er3+ 和 Yb3+ 离子激活的锗酸盐纳米磷光体的上转换发光

合成了组成为 Sr2La8(1x-y)ErxYbyGe6O26 (x = 0.01, 0.05, 0.075, 0.1, 0.15) 的晶体团。使用组成为 Sr2La7.85Er0.075Yb0.075Ge6O26 的磷光体作为靶标，通过脉冲电子束蒸发的方法首次获得了无定形状态的纳米磷光体。进行DSC-TGA分析以确定纳米样品的温度稳定性和结晶的开始。发现样品的拉曼光谱随着颗粒尺寸从块状状态到纳米级状态的减小而发生变化。研究了多晶和纳米非晶态样品的上转换光致发光光谱特性。已经表明发光受 Er3+ 离子不同跃迁之间的非辐射过程的影响。在波长为 λex = 980 nm 的激光辐射对纳米样品的泵浦功率相对较低的区域中，存在 Er3+ 和 Yb3+ 水平（2F5/2 级）的阈值群体。高于该阈值时，上转换光致发光强度会急剧增加。