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  • JMSE-D-19-04416_R1

    Rights statement: The final publication is available at Springer via http://dx.doi.org/10.1007/s10854-020-02862-5

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Novel blue-emitting KBaGdSi2O7:Eu2+ phosphor used for near-UV white-light LED

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  • Qinjiang He
  • Renli Fu
  • Weijun Gao
  • Haitao Zhu
  • Xiufeng Song
  • Xinqing Su
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<mark>Journal publication date</mark>28/02/2020
<mark>Journal</mark>Journal of Materials Science: Materials in Electronics
Issue number4
Volume31
Number of pages7
Pages (from-to)3159-3165
Publication StatusPublished
Early online date11/01/20
<mark>Original language</mark>English

Abstract

Novel blue-emitting KBaGdSi2O7:Eu2+ phosphors were designed and synthesized through solid-state reaction method. The structural properties, concentration, and temperature-dependent luminescence behaviors of these phosphors were investigated in detail in this paper. Studies revealed that KBaGdSi2O7:Eu2+ phosphors have an intense absorption in the broad wavelength ranging from 250 to 400 nm that is suitable for the commercial near-UV LED, and give out intense blue light peaked at 475 nm with a full-width half-maximum of 75 nm. The crystallographic information of KBaGdSi2O7 phase is revealed from XRD pattern by Rietveld refinement. Band gap is derived to be 3.93 eV through diffuse reflection spectra through Kubelka Munk function. The concentration quenching mechanism is identified as the dipole–dipole interaction. Moreover, the thermal quenching experiment was also conducted and the activation energy is calculated as 0.3069 eV, which indicates this novel KBaGdSi2O7:Eu2+ phosphor has good thermal stability. These properties exhibit its potential commercial application for near-UV white-light LEDs (w-LEDs).

Bibliographic note

The final publication is available at Springer via http://dx.doi.org/10.1007/s10854-020-02862-5