中国物理B ›› 2018, Vol. 27 ›› Issue (1): 17802-017802.doi: 10.1088/1674-1056/27/1/017802

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Substitution priority of Eu2+ in multi-cation compound Sr0.8Ca0.2Al2Si2O8 and energy transfer

Zhi-Ping Yang(杨志平), Zhen-Ling Li(李振玲), Zhi-Jun Wang(王志军), Pan-Lai Li(李盼来), Miao-Miao Tian(田苗苗), Jin-Ge Cheng(程金阁), Chao Wang(王超)   

  1. College of Physics Science & Technology, Hebei Key Laboratory of Optic-Electronic Information and Materials, Hebei University, Baoding 071002, China
  • 收稿日期:2017-07-24 修回日期:2017-10-09 出版日期:2018-01-05 发布日期:2018-01-05
  • 通讯作者: Zhi-Jun Wang, Pan-Lai Li E-mail:wangzj1998@126.com;li_panlai@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51672066 and 50902042), Funds for Distinguished Young Scientists of Hebei Province, China (Grant No. A2015201129), and Personnel Training Project of Hebei Province, China (Grant No. A2016002013).

Substitution priority of Eu2+ in multi-cation compound Sr0.8Ca0.2Al2Si2O8 and energy transfer

Zhi-Ping Yang(杨志平), Zhen-Ling Li(李振玲), Zhi-Jun Wang(王志军), Pan-Lai Li(李盼来), Miao-Miao Tian(田苗苗), Jin-Ge Cheng(程金阁), Chao Wang(王超)   

  1. College of Physics Science & Technology, Hebei Key Laboratory of Optic-Electronic Information and Materials, Hebei University, Baoding 071002, China
  • Received:2017-07-24 Revised:2017-10-09 Online:2018-01-05 Published:2018-01-05
  • Contact: Zhi-Jun Wang, Pan-Lai Li E-mail:wangzj1998@126.com;li_panlai@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51672066 and 50902042), Funds for Distinguished Young Scientists of Hebei Province, China (Grant No. A2015201129), and Personnel Training Project of Hebei Province, China (Grant No. A2016002013).

摘要: A blue phosphor was obtained by doping Eu2+ into a multi-cation host Sr0.8Ca0.2Al2Si2O8 through high temperature solid state reaction. The emission spectra show a continuous red-shift behavior from 413 nm to 435 nm with Eu2+ concentration increasing. The substitution priority of Eu2+ in Sr0.8Ca0.2Al2Si2O8 was investigated via x-ray diffraction (XRD) and temperature properties in detail:the Ca2+ ions are preferentially substituted by Eu2+at lower doping, and with the Eu2+ concentration increasing, the probability of substitution for Sr2+ is greater than that of replacing Ca2+. Accordingly, we propose the underlying method of thermal property to determine the substitution of Eu2+ in the multi-cation hosts. Moreover, the abnormal increase of emission intensity with increasing temperature was studied by the thermoluminescence spectra. The energy transfer mechanism between the Eu2+ ions occupying different cation sites was studied by the lifetime decay curves. A series of warm white light emitting diodes were successfully fabricated using the blue phosphors Sr0.8Ca0.2Al2Si2O8:Eu2+ with commercial red phosphor (Ca Sr)SiAlN3:Eu2+ and green phosphor (Y Lu)3Al5O12:Ce3+, and the luminescent efficiency can reach 45 lm/W.

关键词: luminescence, phosphors, energy transfer, substitution priority

Abstract: A blue phosphor was obtained by doping Eu2+ into a multi-cation host Sr0.8Ca0.2Al2Si2O8 through high temperature solid state reaction. The emission spectra show a continuous red-shift behavior from 413 nm to 435 nm with Eu2+ concentration increasing. The substitution priority of Eu2+ in Sr0.8Ca0.2Al2Si2O8 was investigated via x-ray diffraction (XRD) and temperature properties in detail:the Ca2+ ions are preferentially substituted by Eu2+at lower doping, and with the Eu2+ concentration increasing, the probability of substitution for Sr2+ is greater than that of replacing Ca2+. Accordingly, we propose the underlying method of thermal property to determine the substitution of Eu2+ in the multi-cation hosts. Moreover, the abnormal increase of emission intensity with increasing temperature was studied by the thermoluminescence spectra. The energy transfer mechanism between the Eu2+ ions occupying different cation sites was studied by the lifetime decay curves. A series of warm white light emitting diodes were successfully fabricated using the blue phosphors Sr0.8Ca0.2Al2Si2O8:Eu2+ with commercial red phosphor (Ca Sr)SiAlN3:Eu2+ and green phosphor (Y Lu)3Al5O12:Ce3+, and the luminescent efficiency can reach 45 lm/W.

Key words: luminescence, phosphors, energy transfer, substitution priority

中图分类号:  (Photoluminescence, properties and materials)

  • 78.55.-m
33.50.Dq (Fluorescence and phosphorescence spectra) 33.20.Kf (Visible spectra)