Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5025216 | Optik - International Journal for Light and Electron Optics | 2017 | 17 Pages |
Abstract
In this study, the effect of the molar ratio between the GeO2 and SiO2 components of the violet-blue GeO2·SiO2 phosphor glass on its photoluminescence (PL) activity has been examined. The strongest PL intensity was observed for the (GeO2)20(SiO2)80 compound, and its room-temperature internal quantum efficiency estimated at an excitation wavelength of 250 nm was 53%. This value was further increased by the addition of Al and Zr elements to the (GeO2)20(SiO2)80 phosphor, and the internal quantum efficiencies of the resulting (GeO2)20(SiO2)80 + 2000 ppm Zr and (GeO2)20(SiO2)80 + 1000 ppm Al systems measured at room temperature were equal to 66 and 70%, respectively.
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Authors
Susumu Nakayama, Taro Asahi, Yasushi Omura, Hisami Tsuji, Natsumi Okubo,