Fabrication,structure and photoluminescence properties of Eu~(3+)-activated red-emitting Ba_2Gd_2Si_

• 作 者: 吕天帅 徐旭辉 王达健 孙亮 邱建备
• 机 构: College of Materials Science and Engineering, Kunming University of Science and Technology,School of
• 出 处: Optoelectronics Letters
• 发表日期: 2014年02期
• 关键词: excitation lighting luminescent phosphor luminescence probably concave convex te

Eu3+-activated red-emitting Ba2Gd2Si4O13 phosphors are prepared via microwave(MW) synthesis and solid-state(SS) method. The structural and luminescent properties of phosphors are investigated by X-ray diffraction(XRD), photoluminescence(PL) spectra and scanning electron microscopy(SEM). Upon 393 nm excitation, compared with the sample sintered by SS method, luminescence enhancement is observed in the sample synthesized by MW method. The mechanism of MW synthesis process is discussed in detail. Results indicate that the PL enhancement is probably related to the concave-convex phosphor surfaces and uniform grains, which may reinforce scattering of excitation light. Our research may further promote the understanding of MW synthesis and extend the application of Eu3+-activated Ba2Gd2Si4O13 in white light-emitting diodes.

The structural and luminescent properties of phosphors are investigated by X-ray diffraction (XRD), photoluminescence (PL) spectra and scanning electron microscopy (SEM) Upon the excitation of an electron microscopy (SEM). Upon 393 nm excitation, compared with the sample sintered by SS method, luminescence enhancement is observed in the sample synthesized by MW method. The mechanism of MW synthesis process is discussed in detail. probably related to the concave-convex phosphor surfaces and uniform grains, which may reinforce the scattering of excitation light. Our research may further promote the understanding of MW synthesis and extend the application of Eu3 + -activated Ba2Gd2Si4O13 in white light-emitting diodes.