Abstract
Here we report a novel quadrilayer structure glass/ceramic with multicolor emission, which has a great potential to be used as a light converter for laser lighting with low blue light and high color rendering index. The multilayer glass/ceramic was prepared by controlling the crystallization of the double-layer Sr1.07Eu0.03Al2.2Si1.8O8/Sr1.09Sm0.01Al2.2Si1.8O8 glass. The outer layers of the glass/ceramic are the ceramic layers and the inner layers are the glass layers. Hexagonal Sr1.1Al2.2Si1.8O8 is the only crystal phase precipitated during the crystallization process and these crystals are highly oriented in growth. The Ra and CRI values of the white light-emitting LD prepared by employing the multi-layer glass/ceramic as the light converter and a 405 nm LD as the pump source are both more than 90. This work provides a novel and enlightening idea for the design and preparation of the multilayer glass/ceramic with multicolor emission.
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