Spectral characteristics of germanium compounds having apatite structure

Васин, А. А.; Зуев, М. Г.; Zabolotskaya, E. V.; Бакланова, И. В.; Akashev, L. A.; Sammigulina, R.F.

doi:10.1016/j.jlumin.2015.07.019

Cited by 10 publications

(1 citation statement)

References 33 publications

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“…Например, силикаты со структурой апатита известны как эффективные матрицы для активации их РЗЭ-ионами. Из-за высокой интенсивности люминесценции и химической стабильности до 1000 • C эти материалы могут быть использованы в качестве активных лазерных сред и люминофоров [4][5][6][7]. Уменьшение частиц люминофоров от микродо наноразмера приводит к появлению спектральнолюминесцентных характеристик, отличающихся от таковых для объемных образцов.…”

Section: Introductionunclassified

Новые апконверсионные объемные и нанолюминофоры на основе Sr-=SUB=-2-=/SUB=-Y-=SUB=-8-x-y-=/SUB=-Yb-=SUB=-y-=/SUB=-Tm-=SUB=-x-=/SUB=-Si-=SUB=-6-=/SUB=-O-=SUB=-26-=/SUB=-

Зуев¹,

Васин²,

Ильвес³

et al. 2023

Оптика И Спектроскопия

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Polycrystalline phosphors with a Sr2Y8-x-yYbyTmxSi6O26 (x=0.005-0.5, y=0.2,0.3) total formula were synthesized. Nanoluminophor has been obtained from the Sr2Y7.695Yb0.3Tm0.005Si6O26 microcrystalline sample by the vacuum electron been evaporation, in the amorphous state, with the ~10.6 nm particle size. It is found, raman spectra undergoing modification by the transition from bulk- to nanosize state. Photoluminescene spectra micro- and nanophosphors are studied. Intensity of the blue emission, by the UV ligth excitation, grows in the x=0.005-0.02 region, with the x increasing. Upconversion photoluminescence (UPCL) spectra of the bulk phosphors and nanosample based on the Sr2Y7.695Yb0.3Tm0.005Si6O26 were measurd. At the pumping power around 70.8 mW, by the laser source with the λ=980 nm, thereshold population of the 3F3 level of Tm3+ ions exist. At a power higher 70.8 mW, a sharp increase of the luminescence intensityof the bulk- and nanophosphor occurs. For the 3H4->3H6 transition thereshold pumping power absent. This indicates that, pumping, during Yb->Tm energy transer, is a single photon process.

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Section: Introductionunclassified