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K7Ca9[Si2O7]4F:Ce3+: a novel blue-emitting phosphor with good thermal stability for ultraviolet-excited light emitting diodes
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2017-10-11 00:00:00 , DOI: 10.1039/c7tc02561k Wanying Geng 1, 2, 3, 4, 5 , Xufeng Zhou 1, 2, 3, 4, 5 , Jianyan Ding 1, 2, 3, 4, 5 , Gen Li 1, 2, 3, 4, 5 , Yuhua Wang 1, 2, 3, 4, 5
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2017-10-11 00:00:00 , DOI: 10.1039/c7tc02561k Wanying Geng 1, 2, 3, 4, 5 , Xufeng Zhou 1, 2, 3, 4, 5 , Jianyan Ding 1, 2, 3, 4, 5 , Gen Li 1, 2, 3, 4, 5 , Yuhua Wang 1, 2, 3, 4, 5
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In this work, a novel potassium-calcium silicate-fluoride based phosphor: K7Ca9[Si2O7]4F (KCSOF) has been successfully synthesized by a solid-state reaction at low temperature. The occupation of Ce3+ is studied by Rietveld refinement, luminescence properties and decay curves. KCSOF:Ce3+ presents a wide absorption band ranging from 240 to 420 nm and displays blue emission (λmax = 445 nm). Good thermal stability has also been detected, which shows that it still retains 90% of the initial intensity at 200 °C. In addition, a white LED device has been manufactured by connecting a 380 nm UV chip with a blend of KCSOF:Ce3+, (Sr, Ba)SiO4:Eu2+ and CaAlSiN3:Eu2+. The color coordinates, correlated color temperature and color rendering index of the manufactured LED device are (0.421, 0.407), 3256 K and 95.55, respectively. These results suggest that the blue-emitting KCSOF:Ce3+ phosphor has good prospects for applications in white UV LEDs.
中文翻译：
K 7 Ca 9 [Si 2 O 7 ] 4 F：Ce 3+：一种新型的发蓝光荧光粉，对紫外线激发的发光二极管具有良好的热稳定性
在这项工作中，通过低温下的固相反应成功地合成了新型的氟化钾硅酸钙钙基荧光粉：K 7 Ca 9 [Si 2 O 7 ] 4 F（KCSOF）。通过Rietveld精炼，发光特性和衰减曲线研究了Ce 3+的占据。KCSOF：Ce的3+呈现宽的吸收带范围从240至420nm和显示蓝色发射（λ最大= 445纳米）。还检测到良好的热稳定性，这表明它在200°C时仍保留初始强度的90％。此外，通过将380 nm的UV芯片与KCSOF：Ce的混合物连接在一起，制造了白色LED器件。3+，（Sr，Ba）SiO 4：Eu 2+和CaAlSiN 3：Eu 2+。所制造的LED器件的色坐标，相关色温和显色指数分别为（0.421、0.407），3256 K和95.55。这些结果表明，发蓝光的KCSOF：Ce 3+荧光粉在白色UV LED中具有良好的应用前景。
更新日期：2017-11-16
中文翻译：
K 7 Ca 9 [Si 2 O 7 ] 4 F：Ce 3+：一种新型的发蓝光荧光粉，对紫外线激发的发光二极管具有良好的热稳定性
在这项工作中，通过低温下的固相反应成功地合成了新型的氟化钾硅酸钙钙基荧光粉：K 7 Ca 9 [Si 2 O 7 ] 4 F（KCSOF）。通过Rietveld精炼，发光特性和衰减曲线研究了Ce 3+的占据。KCSOF：Ce的3+呈现宽的吸收带范围从240至420nm和显示蓝色发射（λ最大= 445纳米）。还检测到良好的热稳定性，这表明它在200°C时仍保留初始强度的90％。此外，通过将380 nm的UV芯片与KCSOF：Ce的混合物连接在一起，制造了白色LED器件。3+，（Sr，Ba）SiO 4：Eu 2+和CaAlSiN 3：Eu 2+。所制造的LED器件的色坐标，相关色温和显色指数分别为（0.421、0.407），3256 K和95.55。这些结果表明，发蓝光的KCSOF：Ce 3+荧光粉在白色UV LED中具有良好的应用前景。
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