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• W2149881857 abstract "We have measured optical absorption and radioluminescence of Yb1.999Ce0.001SiO5 (YbSO) and found it to be a very poor phosphor. This is in striking contrast to Lu-, Y-, and Gd-based oxyorthosilicates, which are characterized by very strong Ce3+ emission. The absence of luminescence in YbSO is due to quenching of the Ce3+ emission via an [Yb2+–Ce4+] charge-transfer mechanism. Extremely weak band emission observed in YbSO is attributed to transitions connecting the (Yb2+–h+) charge-transfer state to the two levels of the Yb2+ 4f13 configuration. Optical absorption shows the usual bands due to Ce3+ absorption with a band edge near 260 nm. The RL emission spectrum consists of a well-resolved band near 500 nm and an additional band in the region 260–300 nm. The exact position of the latter band cannot be determined due to concomitant Ce3+ absorption. At room temperature the YbSO RL emission is ca. six orders of magnitude weaker than Lu2SiO5 : Ce (LSO) emission. Maximum intensity in the interval 8–300 K occurs near 40 K and is ca. four orders of magnitude weaker than LSO emission. The YbSO band emission is thermally quenched with increasing temperature (40–300 K), consistent with classical theory predictions." @default.
• W2149881857 created "2016-06-24" @default.
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• W2149881857 date "1998-10-01" @default.
• W2149881857 modified "2023-09-25" @default.
• W2149881857 title "Temperature-dependent luminescence of cerium-doped ytterbium oxyorthosilicate" @default.
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• W2149881857 doi "https://doi.org/10.1016/s0022-2313(98)00042-8" @default.
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