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Compared with the conformal as well as in-cup phosphor configuration, the remote phosphor format has the disadvantage of color quality but is contemporaneously more luminous. From this adversity, pieces of research were created with the purpose to boost the hue standard that belongs to this structure. In this research, we recommended the dual-film remote phosphor configuration to ameliorate the color rendering index (CRI) along with color quality scale (CQS) for WLEDs. The three structures for WLEDs are equivalent, which have distinct hue heat including 5600 K, 8500 K that are utilized. The idea was to place a layer of blue phosphor Zn2SiO4:Mn2+,As5+ or red phosphor La2O3:Eu3+ upon the yellow phosphor YAG:Ce3+. Following that was to get the appropriate concentration of La2O3:Eu3+ to add in to perceive the highest color quality. The result showed up La2O3:Eu3+ benefited remarkably to raise CRI as well as CQS. Bigger La2O3:Eu3+ proportion leads to higher CRI as well as CQS would get owing to an increase in the red light section of WLED. Meanwhile, the blue phosphor layer brought benefits to the luminous flux. However, if the concentrations of La2O3:Eu3+ and Zn2SiO4:Mn2+,As5+ excessively increase, it will cause the lumen output and hue standard to decrease correspondingly. This was proved utilizing the Mie dispersion hypothesis as well as Lambert–Beer principle. The result will contribute greatly to the constitution of WLEDs with higher white illumination quality.

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Apply Dual-Film Distant Phosphor Configurations to Enhance WLEDs’ Hue Uniformity and Lumen Output

  • 会议论文

  • 发表日期：

    2025年

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  • Pham Van De,
  • Bach Thanh Quy,
  • Phan Xuan Le

摘要

Compared with the conformal as well as in-cup phosphor configuration, the remote phosphor format has the disadvantage of color quality but is contemporaneously more luminous. From this adversity, pieces of research were created with the purpose to boost the hue standard that belongs to this structure. In this research, we recommended the dual-film remote phosphor configuration to ameliorate the color rendering index (CRI) along with color quality scale (CQS) for WLEDs. The three structures for WLEDs are equivalent, which have distinct hue heat including 5600 K, 8500 K that are utilized. The idea was to place a layer of blue phosphor Zn2SiO4:Mn2+,As5+ or red phosphor La2O3:Eu3+ upon the yellow phosphor YAG:Ce3+. Following that was to get the appropriate concentration of La2O3:Eu3+ to add in to perceive the highest color quality. The result showed up La2O3:Eu3+ benefited remarkably to raise CRI as well as CQS. Bigger La2O3:Eu3+ proportion leads to higher CRI as well as CQS would get owing to an increase in the red light section of WLED. Meanwhile, the blue phosphor layer brought benefits to the luminous flux. However, if the concentrations of La2O3:Eu3+ and Zn2SiO4:Mn2+,As5+ excessively increase, it will cause the lumen output and hue standard to decrease correspondingly. This was proved utilizing the Mie dispersion hypothesis as well as Lambert–Beer principle. The result will contribute greatly to the constitution of WLEDs with higher white illumination quality.