Luminescent Properties of Divalent Samarium-Doped Strontium Hexaborate
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- 作者：Qinghua Zeng ; Zhiwu Pei ; Shubing Wang ; Qiang Su ; and Shaozhe Lu
- 刊名：Chemistry of Materials
- 出版年：1999
- 出版时间：March 1999
- 年：1999
- 卷：11
- 期：3
- 页码：605 - 611
- 全文大小：132K
- 年卷期：v.11,no.3(March 1999)
- ISSN：1520-5002
文摘
The valence change of samarium from trivalent to divalent in strontium hexaborate(SrB6O10) prepared in air is observed. The temperature dependence of the luminescence andvibronic transitions of Sm2+ are studied. The Sm2+ ions occupy three crystallographic sites.With increasing temperature, the 5D0
7F0 transition line exhibits red shifts, and the half-width increases. At room temperature, due to the thermal population through the 4f55dchannel, the 5D17FJ transitions are observed even though the vibrational energy is veryclose to the energy gap between the 5D1 and 5D0 levels in the host. A coupled phonon energyof about 108 cm-1 is determined from the vibronic transitions of Sm2+ in the host.
7F0 transition line exhibits red shifts, and the half-width increases. At room temperature, due to the thermal population through the 4f55dchannel, the 5D17FJ transitions are observed even though the vibrational energy is veryclose to the energy gap between the 5D1 and 5D0 levels in the host. A coupled phonon energyof about 108 cm-1 is determined from the vibronic transitions of Sm2+ in the host.