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<p>Phosphors for white light emitting diode (WLED) have kept catching the researchers’ attention. Herein, Ce<sup>3+</sup>-activated garnet Lu<sub>2</sub>CaMg<sub>2</sub>Si<sub>3</sub>O<sub>12</sub> orange phosphor was synthesized and Ca content was decreased to create Ca vacancy into the lattice to further improve the luminescence properties. XRD patterns and Rietveld refinement were executed to investigate the effect of Ca vacancy on the lattice structure. The synthesized phosphors exhibited broad excitation band in blue region and broad emission band ranging from 530 to 750&#xa0;nm. Via creating Ca vacancy into the lattice both the emission and the thermal stability of Ce<sup>3+</sup>-doped Lu<sub>2</sub>CaMg<sub>2</sub>Si<sub>3</sub>O<sub>12</sub> were improved. Quantum efficiency of the optimized sample Lu<sub>2</sub>Ce<sub>0.06</sub>Ca<sub>0.95</sub>Mg<sub>2</sub>Si<sub>3</sub>O<sub>12</sub> reaches 84.7%. Optimized Lu<sub>1.94</sub>Ce<sub>0.06</sub>Ca<sub>0.95</sub>Mg<sub>2</sub>Si<sub>3</sub>O<sub>12</sub> was mixed with the cyan phosphor Ca<sub>3</sub>Sc<sub>2</sub>Si<sub>3</sub>O<sub>12</sub>:Ce<sup>3+</sup> and spread on the blue chip to fabricate WLED device, showing high color rendering index 86.6 and correlated color temperature 4404&#xa0;K. This work provides a simple strategy to improve the luminescence property of Lu<sub>2</sub>CaMg<sub>2</sub>Si<sub>3</sub>O<sub>12</sub>:Ce<sup>3+</sup> and a thermally stable orange phosphor for WLED.</p>

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Luminescence improvement of Ce3+-doped Lu2CaMg2Si3O12 orange phosphor for WLED based on Ca vacancy

  • 期刊论文

  • 发表日期：

    2025年4月22日

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  • Yingkai Fu,
  • Yubo Feng,
  • Kaiyang Li,
  • Yuhan Yan,
  • Runtao Chen,
  • Yuwen Peng,
  • Weijie Li,
  • Yang Zheng,
  • Xu Qian,
  • Jianying Ding,
  • Quan Liu

摘要

Phosphors for white light emitting diode (WLED) have kept catching the researchers’ attention. Herein, Ce3+-activated garnet Lu2CaMg2Si3O12 orange phosphor was synthesized and Ca content was decreased to create Ca vacancy into the lattice to further improve the luminescence properties. XRD patterns and Rietveld refinement were executed to investigate the effect of Ca vacancy on the lattice structure. The synthesized phosphors exhibited broad excitation band in blue region and broad emission band ranging from 530 to 750 nm. Via creating Ca vacancy into the lattice both the emission and the thermal stability of Ce3+-doped Lu2CaMg2Si3O12 were improved. Quantum efficiency of the optimized sample Lu2Ce0.06Ca0.95Mg2Si3O12 reaches 84.7%. Optimized Lu1.94Ce0.06Ca0.95Mg2Si3O12 was mixed with the cyan phosphor Ca3Sc2Si3O12:Ce3+ and spread on the blue chip to fabricate WLED device, showing high color rendering index 86.6 and correlated color temperature 4404 K. This work provides a simple strategy to improve the luminescence property of Lu2CaMg2Si3O12:Ce3+ and a thermally stable orange phosphor for WLED.