Luminescence of High-Pressure Phases of Eu2+ Activated Alkaline Earth Borates and Silicates
Luminescence properties of the high-pressure phases of Eu2+ activated alkaline earth borates (MB2O4:Eu2+) and silicates (MSiO3: Eu2+) were studied. Their quantum efficiencies increased strikingly with transformation from low pressure to high pressure phases. One of the high pressure forms of the metaborates, cubic Sr1−xEuxB2O4(x=0.01), was found to be an efficient photoluminescent material. The quenching effect owing to the interaction between the neighboring Eu2+ ions in the high-pressure phase is expected to be small compared with that in an atmospheric pressure phase. The same phase transformation effect was observed for Eu2+-activated silicates, Ca1−xEuxSiO3 and Sr1−xEUxSiO3.
KeywordsSilicate Boron Borate Strontium Metaborates
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