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Journal of Materials Science: Materials in Electronics
Erschienen in: Journal of Materials Science: Materials in Electronics 6/2020

14.02.2020

Synthesis and photoluminescence properties of high thermal stability Mn4+ in orthorhombic SrLa2Mg2W2O12 red phosphor for warm w-LEDs

verfasst von: Lei Shi, Ya-jie Han, Shuang Wang, Jing-meng Jiao, Shi-hao Chang, Zhong-fei Mu, Zhi-yong Mao, Da-jian Wang, Zhi-wei Zhang, Xu-lin Lu

Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 6/2020

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Abstract

We successfully synthesized SrLa2Mg2W2O12:xMn4+ (x = 0.002, 0.004, 0.006, 0.008, 0.010, 0.012, 0.014) phosphors through a high-temperature solid-state reaction. The phase of sample was shown by X-ray powder diffraction (XRD). The morphology of the sample was observed by field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM), which showed the irregular morphology of SrLa2Mg2W2O12 (SLMW) powders. Additionally, the photoluminescence excitation (PLE), emission (PL) and ultraviolet–visible reflection spectra were also presented. As shown in results, the phosphor could be stimulated by the ultraviolet (UV) and near ultraviolet (NUV) light and then exhibited far-red emission (697 nm). The optimum doping concentration of Mn4+ is 1 mol%. The thermal stability of phosphors has been investigated and discussed (I423K/I298K = 64.6%), and the internal quantum efficiency (IQE) of SLMW:0.01Mn4+ phosphors is as high as 51.2%. Finally, a far-red light-emitting diodes (LEDs) was fabricated by combining a 365 nm near-ultraviolet InGaN chip with SLMW:0.01Mn4+ phosphor. The Color Rendering Index (CRI), correlated color temperature (CCT) and luminescent efficiency (LE) values were 29.5, 1159 K and 5.6 lm/W, respectively. All of these indicated that SLMW:Mn4+ as a far-red phosphor can be applied to LEDs lamp and it has enormous potential applications in white light-emitting diodes (w-LEDs).
Vorheriger Artikel Growth of PbBr2 microrods with unique structure and surface morphology
Nächster Artikel Highly photoresponsive VO2(M1) thin films synthesized by DC reactive sputtering

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Metadaten
Titel
Synthesis and photoluminescence properties of high thermal stability Mn4+ in orthorhombic SrLa2Mg2W2O12 red phosphor for warm w-LEDs
verfasst von
Lei Shi
Ya-jie Han
Shuang Wang
Jing-meng Jiao
Shi-hao Chang
Zhong-fei Mu
Zhi-yong Mao
Da-jian Wang
Zhi-wei Zhang
Xu-lin Lu
Publikationsdatum
14.02.2020
Verlag
Springer US
Erschienen in
Journal of Materials Science: Materials in Electronics / Ausgabe 6/2020
Print ISSN: 0957-4522
Elektronische ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-020-03022-5

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