Abstract
We report on -doped and as orange and red phosphors for white-light-emitting diodes. In both compounds, absorption due to in could be observed and quantified. The emission redshift from to and their different phonon satellite spectra are attributed to the enhancement of phonon–electron interaction. Investigation of the reduction mechanism of to suggests that in oxidizing atmosphere, can be stabilized on sites only in such lattices that are dominated by tetrahedrally coordinated boron.
© 2009 Optical Society of America
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