Red-emitting LiEuMo2−xSixO8 phosphors for white light-emitting diodes
作者： Pengpeng Dai , Xintong Zhang , Xinghua Li , Guorui Wang , Chengjiu Zhao
DOI: 10.1016/J.JLUMIN.2010.11.010
关键词: Photoluminescence 、 Photoluminescence excitation 、 Phosphor 、 Europium 、 Excitation 、 Luminescence 、 Light-emitting diode 、 Chemistry 、 Ion 、 Analytical chemistry
摘要: Abstract Si 4+ was introduced to the lattice of LiEuMo 2 O 8 by solid-state reaction prepare a new kind red-emitting 2− x (0 ≤0.5) phosphors. The introduction ion caused distortion and slight shrinking unit cell material, blue-shift charge-transfer-absorption (CTA) band . Photoluminescence excitation (PLE) photoluminescence measurements showed that able enhance efficiency in NUV spectral region (360–400 nm). Consequently red emission phosphor improved 30% at =0.2 under 395 nm light excitation, without loss color purity. enhanced discussed terms CTA relaxation parity-forbidden selection rules for trivalent europium luminescent centers.
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