Affiliation:
1. College of Chemistry and Materials Science Fujian Normal University Fuzhou China
2. Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou China
3. Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou China
Abstract
AbstractFor high‐power white light‐emitting diode devices (WLEDs), phosphor ceramics were widely used because of their high thermal conductivity and temperature resistance. In this study, Y2.998Al5O12: 0.002Ce3+ ceramics were prepared via vacuum reaction sintering and treated by silicon carbide (SiC) abrasives with particle sizes of 8.6, 20, 25, 34, and 50 μm to obtain a single textured surface. The transmittance, reflectance, luminous efficiency (LE) and photoluminescence (PL) intensity of the ceramics were investigated with various surface roughness and different placement. Compared with the double polished (DP) samples, the PL intensity and LE of the single‐surface textured ceramics were greatly improved. It was shown that the roughest ceramics placed with the single polished (SP) side facing the direction of the excitation light (the SP‐forward YAG: Ce ceramics) showed the best performance.
Subject
Materials Chemistry,Marketing,Condensed Matter Physics,Ceramics and Composites
Cited by
1 articles.
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