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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 >Luminescence of GeO2 glass, rutile-like and alpha-quartz-like crystals
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Luminescence of GeO2 glass, rutile-like and alpha-quartz-like crystals

机译：GeO2玻璃，金红石型和α-石英型晶体的发光

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The luminescence of GeO2 rutile-like crystals was studied. Crystals were grown from it melt of germanium dioxide and sodium bicarbonate mixture. Luminescence of the crystal was compared with that of sodium germanate glasses produced in reduced and oxidized conditions. A luminescence band at 2.3 eV was observed under N-2 laser (337 nm). At higher excitation photon energies and X-ray excitation an additional band at 3 eV appears in luminescence. The band at 2.3 eV possesses intra-center decay time constant about 100 0 at 290 K and about 200 mu s at low temperature. Analogous luminescence was obtained in reduced sodium germanate glasses, No luminescence was observed in oxidized glasses under nitrogen laser, therefore the luminescence of rutile-like crystal and reduced sodium germanate glass was ascribed to oxygen-deficient luminescence center modified by sodium. The band at 2.3 eV could be ascribed to triplet-singlet transition of this center, whereas the band at 3 eV, possessing decay about 0.2 mu s, could be ascribed to singlet singlet transitions. Both bands could be excited in recombination process with decay kinetics determined by traps. when excitation realized by ArF laser or ionizing irradiation with X-ray or electron beam. Another luminescence band at 3.9 eV in GeO, rutile-like crystal was obtained under ArF laser in the range 100-15 K. Damaging e-beam irradiation of GeO, crystal with alpha-quartz structure induces similar luminescence band. (c) 2005 Elsevier B.V. All rights reserved.
机译：研究了GeO2金红石状晶体的发光。从中生长出二氧化锗和碳酸氢钠混合物的熔体晶体。将晶体的发光与在还原和氧化条件下生产的锗酸钠玻璃的发光进行了比较。在N-2激光（337 nm）下观察到2.3 eV的发光带。在较高的激发光子能量和X射线激发下，发光中会出现3 eV的附加谱带。 2.3 eV的波段在290 K时具有约100 0的中心内衰减时间常数，在低温下具有约200μs的中心内衰减时间常数。在还原的锗酸钠玻璃中获得类似的发光，在氮激光下在氧化玻璃中未观察到发光，因此金红石状晶体和还原的锗酸钠玻璃的发光归因于钠修饰的缺氧发光中心。 2.3 eV处的谱带可归因于该中心的三重峰-单峰跃迁，而3 eV处具有约0.2μs衰减的谱带可归因于单重态和单重态跃迁。两条带都可以在重组过程中被激发，并由陷阱确定衰变动力学。当用ArF激光激发或用X射线或电子束进行电离辐射时。在100-15 K范围内的ArF激光下，在GeO中获得了另一个3.9 eV的金红石状晶体发光带。在对GeO进行电子束辐照时，具有α-石英结构的晶体会诱导类似的发光带。 （c）2005 Elsevier B.V.保留所有权利。

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