Red-Emitting Eu3+-Doped Sr3Y2TeO9 Phosphors

Abstract

Abstract: A series of new red-emitting Sr₃Y_2-xTeO₉∶xEu³⁺ phosphors were prepared by high temperature solid-state method, and the phase structure, luminescent performances, decay life and thermal stability of Sr₃Y_2-xTeO₉∶xEu³⁺ were studied. The results show that new red-emitting Sr₃Y_2-xTeO₉∶xEu³⁺ phosphors can emit intensive red light under near-ultraviolet or blue light excitation, and it demonstrate that the concentration quenching mechanism is attributed to the dipole-dipole interaction between Eu³⁺ ions. The color coordinates of these phosphors with different Eu³⁺ concentrations are in the red spectral region. The temperature-dependent luminescences emission spectra reveal that these phosphors show good thermal stability. The optimal doping concentration of Eu³⁺ is x=0.34 for Sr₃Y_2-xTeO₉∶xEu³⁺ phosphor, and its fluorescence decay lifetime is deduced to be 0.619 ms. These overall results show that new red-emitting Sr₃Y_2-xTeO₉∶xEu³⁺ is promising phosphor applied in phosphor-converted near UV-excited white light-emitting diodes.

Key words: white LED, Eu³⁺, tellurate, Sr₃Y_2-xTeO₉, red phosphor, high temperature solid-state method, photoluminescence, optical property

CLC Number:

TQ133.3

YANG Yin, YANG Weibin, LUO Xin, XIE Lanchi, LIN Hongyi, XIONG Feibing. Red-Emitting Eu³⁺-Doped Sr₃Y₂TeO₉ Phosphors[J]. Journal of Synthetic Crystals, 2021, 50(9): 1702-1708.

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Red-Emitting Eu³⁺-Doped Sr₃Y₂TeO₉ Phosphors

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