Abstract

Novel single-phase white-light-emitting Ca₂La₃(SiO₄)₂(PO₄)O:Dy³⁺ (CLSPO:Dy³⁺) phosphors for light-emitting diode (LED) applications were synthesized by conventional solid-state reactions. The phases and luminescent properties of the obtained CLSPO:Dy³⁺ phosphors were well characterized. The results show that the excited bands of CLSPO:Dy³⁺ phosphor centered at wavelengths of 324 nm (⁶H_15/2 → ⁴M_17/2), 350 nm (⁶H_15/2 → ⁴M_15/2, ⁶P_7/2), 366 nm (⁶H_15/2 → ⁴I_11/2), 387 nm (⁶H_15/2 → ⁴I_13/2, ⁴F_7/2), 427 nm (⁶H_15/2 → ⁴G_11/2), and 448 nm (⁶H_15/2 → ⁴I_15/2). On excitation at 350 nm, the emission transitions of Dy³⁺ consisted of double emission bands, which can be assigned to the transition emissions of ⁴F_9/2 → ⁶H_15/2 (480 nm) and ⁴F_9/2 → ⁶H_13/2 (572 nm). The band gap energy of CLSPO and CLSPO : 0.45Dy³⁺ are 3.99 and 3.92 eV, respectively. The developed phosphor has great potential as a single-component white-light-emitting phosphor for UV-light-emitting diodes.

中文翻译：

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Ca 2 La 3（SiO 4）2（PO 4）O：Dy 3+单相全色荧光粉的合成及性能

摘要

通过常规固相合成方法合成了用于发光二极管（LED）应用的新型单相发白光Ca ₂ La ₃（SiO ₄）₂（PO ₄）O：Dy ³⁺（CLSPO：Dy ³⁺）荧光粉。状态反应。获得的CLSPO：Dy ³⁺荧光粉的相和发光特性得到了很好的表征。结果表明，CLSPO：Dy ³⁺荧光粉的激发带集中在324 nm（⁶ H _15/2  → ⁴ M _17/2），350 nm（⁶ H _15/2 → ⁴ M）的波长处_15/2，⁶ P _7/2），366纳米（⁶ ħ _15/2 → ⁴我_11/2），387纳米（⁶ ħ _15/2 → ⁴我_13/2，⁴ ˚F _7/2），427 （⁶ H _15/2 → ⁴ G _11/2）和448 nm（⁶ H _15/2 → ⁴ I _15/2）。在350 nm激发下，Dy ³⁺的发射跃迁由双发射带组成，可以将其分配给⁴ ˚F _9/2 → ⁶ ħ _15/2（480纳米）和⁴ ˚F _9/2 → ⁶ ħ _13/2（572纳米）。CLSPO和CLSPO的带隙能量：0.45Dy ³⁺分别为3.99和3.92eV 。所开发的荧光体作为用于紫外线发光二极管的单组分发白光的荧光体具有巨大的潜力。