Journal of Electronic Materials

, Volume 46, Issue 7, pp 4039–4046 | Cite as

Comparative Photoluminescence Properties and Judd–Ofelt Analysis of Eu3+ Ion-Activated Metal Molybdate Phosphors A2MoO6:Eu3+ (A = La, Y, Gd and Bi)

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Abstract

A class of red-emitting Eu3+ ion-activated metal molybdate A2MoO6:Eu3+ (A = La, Y, Gd and Bi) phosphors were synthesized by a conventional high-temperature solid-state reaction method. The x-ray diffraction patterns, scanning electron microscope images, Fourier transform infrared spectra, ultraviolet–visible diffuse reflection spectra as well as photoluminescence properties were measured to characterize the as-prepared samples. The photoluminescence properties including excitation/emission spectra, decay curves, Commission Internationale de L’Eclairage chromaticity coordinates and quantum efficiency were comparatively investigated in detail. The Judd–Ofelt theory was also applied to understand the radiative properties of f–f transitions of Eu3+ ions in this system for the first time. The as-prepared phosphors can be effectively excited with near-ultraviolet and/or blue light, and exhibit red emission belonging to the prevailing 5D0 → 7F2 transitions of Eu3+ with short decay time (millisecond level). The results demonstrated that A2MoO6:Eu3+ (A = La, Y, Gd and Bi) phosphors could have potential application as red-emitting phosphors in white light-emitting diodes based on near-ultraviolet and/or blue light-emitting diode chips.

Keywords

LED luminescence molybdate Judd–Ofelt analysis Eu3+ 
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Notes

Acknowledgements

The work is financially supported by the National Natural Science Foundation of China (No. 21501153) and the Science and Technology Project of Henan Province (No. 142300410245).

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Copyright information

© The Minerals, Metals & Materials Society 2017

Authors and Affiliations

  1. 1.School of Material and Chemical EngineeringZhengzhou University of Light IndustryZhengzhouPeople’s Republic of China

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