高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (8): 1826.doi: 10.7503/cjcu20130097

• 研究论文: 无机化学 • 上一篇    下一篇

Ce,Mn:YAG单晶的生长及光学性能

张志敏1, 梁晓娟1, 赵斌宇2, 陈兆平1, 刘炳峰1, 钟家松2, 向卫东1, 吕春燕3   

  1. 1. 温州大学化学与材料工程学院, 温州 325035;
    2. 同济大学材料科学与工程学院, 上海 200092;
    3. 湖州师范学院化学系, 湖州 313000
  • 收稿日期:2013-01-28 出版日期:2013-08-10 发布日期:2013-07-19
  • 通讯作者: 梁晓娟,女,研究员,主要从事无机光电材料的研究.E-mail:lxj6126@126.com;向卫东,男,博士,教授,主要从事LED相关无机光电材料的研究.E-mail:xiangweidong001@126.com E-mail:lxj6126@126.com;xiangweidong001@126.com
  • 基金资助:

    国家自然科学基金(批准号: 51172165); 浙江省自然科学基金重点项目(批准号: Z4110347); 浙江省自然科学基金(批准号: LY12E02002); 温州市科技局计划项目(批准号: G20090082)和湖州市自然科学基金(批准号: 2011YZ02)资助.

Growth and Luminescence Properties of Ce,Mn: YAG Single Crystal

ZHANG Zhi-Min1, LIANG Xiao-Juan1, ZHAO Bin-Yu2, CHEN Zhao-Ping1, LIU Bing-Feng1, ZHONG Jia-Song2, XIANG Wei-Dong1, LÜ Chun-Yan3   

  1. 1. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China;
    2. College of Materials Science and Engineering, Tongji University, Shanghai 200092, China;
    3. Department of Chemistry, Huzhou Teachers College, Huzhou 313000, China
  • Received:2013-01-28 Online:2013-08-10 Published:2013-07-19
  • Contact: Xiang Weidong E-mail:lxj6126@126.com;xiangweidong001@126.com

摘要:

采用提拉法生长了白光发光二极管(LED)用Ce,Mn: YAG单晶, 通过X射线衍射(XRD)测试、 X射线吸收精细结构(XAFS)测试、 吸收光谱和激发发射光谱对其晶相结构、 掺杂Mn的价态和光谱特性进行了表征, 并研究了晶片厚度及驱动电流的变化对LED器件光电性能的影响. 在460 nm蓝光的激发下, Ce,Mn: YAG单晶的发射光谱可由中心波长526和566 nm的宽带发射峰复合而成. XAFS测试结果表明, 所得单晶中掺杂Mn的价态以正二价为主. 由于Ce3+和Mn2+在YAG单晶中存在能量传递, 荧光光谱中566 nm处的橙色发射峰对应于Mn2+离子4T16A1能级的辐射跃迁.

关键词: 白光LED, 钇铝石榴石, 晶体生长, 光学性能

Abstract:

Ce,Mn: YAG single crystal for white light emitting diode(LED) was grown by Czochralski method. The structure, valence states of doped Mn and optical properties of the samples were characterized by X-ray diffraction(XRD), X-ray absorption fine structure(XAFS), absorption and photoluminescence spectra. The photoelectric parameters of white LED were also measured by changing the thickness of single crystal and the driving current. Ce,Mn: YAG single crystal shows a broad emission band peak around 526 nm and 566 nm under blue light of 460 nm. The XAFS result shows that the valence states of doped Mn are mostly Mn2+ in the Ce,Mn: YAG. Due to the effective energy transfer between Ce3+ and Mn2+ in YAG single crystal, the bright orange luminescence in the bands peaked at 566 nm are caused by the 4T16A1 radiative transitions of Mn2+.

Key words: White light emitting diode, Yttrium aluminum garnet, Crystal growth, Luminescence property

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