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Synthesis and photoluminescence characteristics of high color purity Ba3Y4O9:Eu3+ red-emitting phosphors with excellent thermal stability for warm W-LED application

机译：高色纯度Ba3Y4O9的合成和光致发光特性：Eu3 +红发磷光体具有优异的温度W-LED应用的热稳定性

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摘要

Single phase Eu3+-activated Ba3Y4O9 (Ba-3(Y1-xEux)(4)O-9) red-emitting phosphors with different Eu3+ doping concentrations were synthesized by a high temperature solid-state reaction method. The phase purity, crystal structure, photoluminescence properties, internal quantum efficiency, decay lifetimes, and thermal stability were investigated. Upon excitation at 396 nm near-ultraviolet light and 469 nm blue light, the Ba-3(Y1-xEux)(4)O-9 phosphors exhibited a strong red emission at 614 nm due to the D-5(0) F-7(2) transition of Eu3+ ions. The optimal doping concentration of Eu3+ ions in Ba-3(Y1-xEux)(4)O-9 was found to be x = 0.25. Furthermore, the critical distance was calculated to be 12.78 angstrom and the energy transfer mechanism for the concentration quenching effect was determined to be quadrupole-quadrupole interaction. In addition, the Commission Internationale de I'Eclairage (CIE) chromaticity coordinates of Ba-3(Y0.75Eu0.25)(4)O-9 phosphors were measured to be (0.6695, 0.3302) which located at the red region, and significantly, the high color purity was about 97.9%. The as-synthesized phosphors also possessed excellent thermal stability and the activation energy was determined to be 0.29 eV. Therefore, the investigated results indicated that the Ba3Y4O9:Eu3+ phosphor may be a suitable candidate as a red phosphor for white light-emitting diodes under effective excitation at near-ultraviolet and blue light.
机译：单相Eu3 +的活化Ba3Y4O9（BA-3（Y 1-xEux）（4）O-9）红光的磷光体不同的Eu3 +的掺杂浓度是通过高温固相反应法来合成。相纯度，晶体结构，光致发光特性，内部量子效率，寿命衰变和热稳定性进行了研究。当在近紫外光396纳米和469纳米的蓝色光，钡 - 3（Y 1-xEux）激励（4）O-9表现出荧光体在614纳米的强红色发光由于d-5（0）F- Eu3 +的离子的7（2）的过渡。 Eu3 +的离子在钡 - 3（Y 1-xEux）的最佳掺杂浓度（4）O-9被发现为x = 0.25。此外，临界距离计算为12.78埃和用于浓度猝灭效应的能量传递机制被确定为四极 - 四极相互作用。此外，国际照明委员会（CIE）色度坐标的Ba-3（Y0.75Eu0.25）（4）O-9，测定荧光体是（0.6695，0.3302），其位于所述红色区域，并显著，高色纯度大约为97.9％。所合成的荧光体也具有优异的热稳定性，并确定了激活能为0.29电子伏特。因此，所研究的结果表明，Ba3Y4O9：Eu3 +的荧光体可以是合适的候选者作为红色荧光体在近紫外和蓝色光下有效激发的白色发光二极管。

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  • 来源
    《RSC Advances》 |2018年第56期|共8页
  • 作者

    Liang Jia; Sun Liangling; Annadurai G.; Devakumar Balaji; Wang Shaoying; Sun Qi; Qiao Jialei; Guo Heng; Li Bin; Huang Xiaoyong;

  • 作者单位

    Taiyuan Univ Technol Coll Phys &

    Optoelect Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Phys &

    Optoelect Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Phys &

    Optoelect Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Phys &

    Optoelect Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Phys &

    Optoelect Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Phys &

    Optoelect Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Phys &

    Optoelect Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Phys &

    Optoelect Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Phys &

    Optoelect Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Phys &

    Optoelect Taiyuan 030024 Shanxi Peoples R China;

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