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Luminescence properties of Sr5Nb4O15: Sm3+ reddish-orange phosphors

QIFENG TANG1,* , JINGQING AO1, BIAO GUO1, WEICAI WAN1, BIYOU PENG1

Affiliation

  1. College of Materials Science and Engineering, Xihua University, Chengdu 610039, PR China

Abstract

In this study, Sr5Nb4O15: Sm3+ phosphors were synthesized using a high temperature solid-state reaction method. Their phase composition, particle size distribution, morphology and photoluminescence spectra were investigated by X-ray diffraction, laser granulometry, scanning electron microscopy and fluorescence spectrometer, respectively. The XRD pattern showed that the as-prepared phosphors were single phase with no impurity, and the introduction of Sm3+ had little influence on the crystal structure. The particles of phosphors exhibited a good crystallization and a narrow size distribution with the average diameter of about 1μm. The phosphors presented excellent near ultraviolet and blue light absorption. Under excitation at 406nm, the Sr5Nb4O15: Sm3+ phosphors emitted bright reddish-orange light at 601nm deriving from 4G5/2→6H7/2 transition of Sm3+ ions and the optimal doping concentration of Sm3+ was found to be 9mol% for emission intensity reaching to the top. The obtained results indicated that the Sr5Nb4O15: Sm3+ phosphors have high potential for white-light-emitting diodes application..

Keywords

Solid-state reaction; Phosphor; Luminescence; Sm3+ ions.

Submitted at: June 11, 2020
Accepted at: Aug. 16, 2021

Citation

QIFENG TANG, JINGQING AO, BIAO GUO, WEICAI WAN, BIYOU PENG, Luminescence properties of Sr5Nb4O15: Sm3+ reddish-orange phosphors, Journal of Optoelectronics and Advanced Materials Vol. 23, Iss. 7-8, pp. 348-352 (2021)