期刊
OPTICS LETTERS
卷 34, 期 19, 页码 2885-2887出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.34.002885
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- Deutsche Forschungsgemeinschaft (DFG) [WO 1220/2-1]
We report on Bi2+-doped SrB4O7 and SrB6O10 as orange and red phosphors for white-light-emitting diodes. In both compounds, absorption due to P-2(1/2) -> S-2(1/2) in Bi2+ could be observed and quantified. The emission redshift from SrB4O7 to SrB6O10 and their different phonon satellite spectra are attributed to the enhancement of phonon-electron interaction. Investigation of the reduction mechanism of Bi3+ to Bi2+ suggests that in oxidizing atmosphere, Bi2+ can be stabilized on Sr2+ sites only in such lattices that are dominated by tetrahedrally coordinated boron. (C) 2009 Optical Society of America
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