Luminescence properties of highly-oriented fluorescent whiskers

Abstract

We have already reported that preferential orientation fluorescent whiskers have high luminescence intensity than that of random oriented polycrystal films. In this study, preferential orientation axis of fluorescence whiskers, <111> or <100> direction was achieved of the cubic structure of the Y₂O₃ whiskers. The relationship between orientation and luminescence intensity was investigated. No difference between the photoluminescence spectrum pattern of <111> and <100> whiskers was seen. The maximum intensity of the 5.5 at.% Eu³⁺<111> Y₂O₃ whiskers was as same as that of the 6.5 at.% Eu³⁺<100> Y₂O₃ whiskers.