Yellow Emission Obtained by Combination of Broadband Emission and Multi-Peak Emission in Garnet Structure Na2YMg2V3O12: Dy3+ Phosphor.

Weiyi Zhang,Zhaohui Huang,Ximing Huang,Yan’Gai Liu,Can He,Fankai Lin,Xin Min,Minghao Fang,Xiaowen Wu

doi:10.3390/molecules25030542

Weiyi Zhang, Zhaohui Huang + Show 7 more

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https://doi.org/10.3390/molecules25030542

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Abstract

The fabrication and luminescent performance of novel phosphors Na2YMg2V3O12:Dy3+ were investigated by a conventional solid-state reaction method. Under near-UV light, the Na2YMg2V3O12 host self-activated and released a broad emission band (400–700 nm, with a peak at 524 nm) ascribable to charge transfer in the (VO4)3− groups. Meanwhile, the Na2YMg2V3O12:Dy3+ phosphors emitted bright yellow light within both the broad emission band of the (VO4)3- groups and the sharp peaks of the Dy3+ ions at 490, 582, and 663 nm at a quenching concentration of 0.03 mol. The emission of the as-prepared Na2YMg2V3O12:Dy3+ phosphors remained stable at high temperatures. The obtained phosphors, commercial Y2O3:Eu3+ red phosphors, and BaMgAl10O17:Eu2+ blue phosphors were packed into a white light-emitting diode (WLED) device with a near-UV chip. The designed WLED emitted bright white light with good chromaticity coordinates (0.331, 0.361), satisfactory color rendering index (80.2), and proper correlation to a color temperature (7364 K). These results indicate the potential utility of Na2YMg2V3O12:Dy3+ phosphor as a yellow-emitting phosphor in solid-state illumination.

Highlights

For several years, phosphor-converted white light-emitting diodes have been recognized as the most promising replacements of traditional incandescent and fluorescence lamps [1,2,3,4,5].These solid-state light sources deliver high luminescence efficiency and an excellent operation lifetime (>10,000 h) while conserving energy and lowering the pollution risk
The phase compositions and crystal structures of the as-prepared powder samples were characterized at room temperature
All diffraction peaks of the Na2 YMg2 V3 O12 :Dy3+ samples were well matched with the standard profile (PDF No.49-0412), confirming that doping with Y3+ ions did not significantly affect the crystalline structure of Na2 YMg2 V3 O12

Summary

Introduction

Phosphor-converted white light-emitting diodes (pc-WLEDs) have been recognized as the most promising replacements of traditional incandescent and fluorescence lamps [1,2,3,4,5]. These solid-state light sources deliver high luminescence efficiency and an excellent operation lifetime (>10,000 h) while conserving energy and lowering the pollution risk. One method generates white light by combining yellow phosphors with blue LED chips, such as the yellow phosphor YAG: Ce3+ [8,9]. The other method stimulates blue, green, and red (RGB)

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