Effect of Li+ Doping Concentration on Luminescence Characteristics of Sr3ZnNb2O9:Eu3+ Phosphor

Abstract

Abstract: Li⁺ can improve the luminous intensity and thermal stability of Sr₃ZnNb₂O₉:Eu³⁺ phosphor as a charge compensator. In this work, a series of Sr₃ZnNb₂O₉∶xEu³⁺, yLi⁺ (0≤x≤0.5, 0≤y≤0.5) phosphors were synthesized by high-temperature solid-phase reaction. In order to identify and describe the phase, luminescence characteristics and thermal stability of samples, XRD and luminescence spectra tests were carried out. The results show that the Eu³⁺ and Li⁺ are successfully incorporated into the matrix material and replaced Zn²⁺ sites. The optimal doping concentration of Li⁺ is 0.3 (mole fraction), and the type of the concentration quenching mechanism is between the nearest neighbor ions. The Li⁺ doping improves the thermal stability of phosphors. The activation energy is 0.193 eV, and the CIE color coordinate is (0.651, 0.349), which is very close to the standard color coordinate specified by the International Commission on Illumination.

Key words: Sr₃ZnNb₂O₉:xEu³⁺, yLi⁺, luminescence characteristic, phosphor, thermal stability, charge compensation, high-temperature solid-phase reaction

CLC Number:

YUAN Gaofeng, CUI Ruirui, ZHANG Xin, DENG Chaoyong. Effect of Li⁺ Doping Concentration on Luminescence Characteristics of Sr₃ZnNb₂O₉:Eu³⁺ Phosphor[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(12): 4128-4136.

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Effect of Li⁺ Doping Concentration on Luminescence Characteristics of Sr₃ZnNb₂O₉:Eu³⁺ Phosphor

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