A single-phased warm-white-emitting K3Y(PO4)(2):Dy3+,Sm3+ phosphor with tuneable photoluminescence for near-UV-excited white LEDs

作者：Devakumar, Balaji; Guo, Heng; Zeng, Yu-Jia; Huang, Xiaoyong^*

来源：Dyes and Pigments, 2018, 157: 72-79.

DOI：10.1016/j.dyepig.2018.04.042

• Photoluminescence
• WLEDs
• Crystal structure
• Phosphors
• Rare earth ions
• White emissions

Single-phased warm-white-emitting Dy3+/Sm3+ codoped K3Y(PO4)(2) phosphors with tuneable emissions, tuneable color tone and correlated color temperature (CCT) were synthesized through conventional high temperature solid state method. The crystal structure, morphology, and photoluminescence properties of the phosphors were investigated in detail. Under 351 nm excitation, the K3Y(PO4)(2):0.03Dy(3+),0.01 Sm3+ sample emitted warm-white light with CIE coordinates of (0.433, 0.406), low CCT (3088 K) and excellent color rendering index of 95.31. The energy transfer mechanism from the Dy3+ to Sm3+ was determined to be electric dipole-dipole interaction. The results indicate that the Dy3+/Sm3+ codoped K3Y(PO4)(2) phosphors will find their suitable applications in the near-ultraviolet-pumped white light-emitting diodes.

• 出版日期2018-10
• 单位深圳大学; 太原理工大学