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Design and research of a self-activated orange Magnesium Boron Nitride phosphor with its application in W-LEDs

Abstract

In recent years, the rare-earth elements in white light-emitting phosphors has a problem of the increased demand and high price.1 To settle these disadvantages, the defect has been considered to act as one of the new efficient luminescent centers to replace the rare-earth elements. In this work, a rare-earth free self-activated orange light emitting phosphor of single-phase magnesium boron nitride, Mg3BN3 was successfully designed and synthesized by a relatively simple solid-state reaction. Its crystal structure and the electron structure have been measured using the Rietveld refinement on the basis of X-ray diffraction data and the density functional theory (DFT). The results show that Mg3BN3 crystallizes in a centrosymmetric hexagonal phase with plenty of N=B=N double bonds and has a direct bandgap. The SEM, TEM and Raman spectrum exhibit the sample’s good dispersibility and great crystallinity. Under the excitation at 397nm, a broad emission band with orange light emitting peaked at 617nm can be obtained. It is speculated to be resulted from the defect energy levels forming by vacancies, which can also lead to a tunability of emission peak about 100nm.2 The thermal quenching shows that Mg3BN3 at 200°C still has more than 40% of the initial intensity at room temperature. All these results indicate that the self-activated light emitting phosphors of Mg3BN3 is a potential candidate for n-UV LED applications.

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Publication details

The article was received on 23 Aug 2018, accepted on 27 Sep 2018 and first published on 27 Sep 2018


Article type: Paper
DOI: 10.1039/C8DT03438A
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Design and research of a self-activated orange Magnesium Boron Nitride phosphor with its application in W-LEDs

    J. Li, J. Ding, B. Ma, Z. Zhao and Y. Wang, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT03438A

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