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首页> 外文期刊>RSC Advances >Luminescence and energy transfer in a color tunable CaY4(SiO4)(3)O:Ce3+, Mn2+, Tb3+ phosphor for application in white LEDs
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Luminescence and energy transfer in a color tunable CaY4(SiO4)(3)O:Ce3+, Mn2+, Tb3+ phosphor for application in white LEDs

机译：在彩色可调Cay4（SiO 4）（3）O：Ce3 +，Mn2 +，TB3 +荧光体中的发光和能量转移在白色LED中的应用

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摘要

A Ce3+/Mn2+/Tb3+ co-activated CaY4(SiO4)(3)O phosphor was prepared through high temperature solid state reaction process. By means of dielectric theory of chemical bonding for complex crystals, covalence of chemical bonds in CaY4(SiO4)(3)O was calculated. Blue emission from Ce3+ in different crystallographic cation sites was discussed quantitatively based on the calculation results. Dual energy transfer of Ce3+ -> Mn2+ and Ce3+ -> Tb3+ occurs and color tunable emission can be realized by modulation of their relative PL intensity. Energy transfer efficiency has been investigated and the process has been demonstrated to be a resonant type via a dipole-quadrupole mechanism. Critical distance R-c calculated through quenching concentration method and spectral overlap route is 7.23 and 7.55 angstrom, respectively. As-obtained samples show color tunable emission and the corresponding CIE chromaticity coordinates were given. White light with color coordinates (0.3339, 0.3055) and (0.3553, 0.3338), close to those of the ideal, was realized under lower energy UV light. All results show CaY4(SiO4)(3)O: Ce3+, Mn2+, Tb3+ phosphor could be a promising candidate for UV chip pumped light emitting diodes.
机译：通过高温固态反应过程制备CE3 + / MN2 + / TB3 +共激活的Cay4（SiO 4）（3）O磷光体。借助于复合晶体的化学键合的介电理论，计算Cay4（SiO 4）（3）o中的化学键键的核心。根据计算结果，定量讨论了不同晶体阳离子位点中的CE3 +的蓝色发射。通过调制其相对PL强度，可以实现Ce3 + - > Mn2 +和Ce3 + - > Tb3 +的双能量传递和颜色可调发射。已经研究了能量转移效率，并且已经通过偶极 - 四极机构证明该方法是共振型。通过淬火浓度法和光谱重叠路线计算的临界距离R-C分别为7.23和7.55埃。获得的样品显示出色可调发射，并给出相应的CIE色度坐标。较低的能量UV光线实现了较低的彩色坐标（0.3339,0.3055）和（0.3553,0.3055）和（0.3553,0.3338）的（0.3553,0.3338）。所有结果显示Cay4（SiO 4）（3）O：Ce3 +，Mn2 +，TB3 +磷光体可能是UV芯片泵浦发光二极管的有希望的候选者。

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  • 来源
    《RSC Advances》 |2016年第83期|共8页
  • 作者

    Wang Lili; Moon Byung Kee; Park Sung Heum; Kim Jung Hwan; Shi Jinsheng; Kim Kwang Ho; Jeong Jung Hyun;

  • 作者单位

    Pukyong Natl Univ Dept Phys Busan 608737 South Korea;

    Pukyong Natl Univ Dept Phys Busan 608737 South Korea;

    Pukyong Natl Univ Dept Phys Busan 608737 South Korea;

    Dong Eui Univ Dept Phys Busan 614714 South Korea;

    Qingdao Agr Univ Dept Chem &

    Pharmaceut Sci Qingdao 266109 Peoples R China;

    Pusan Natl Univ Sch Mat Sci &

    Engn Busan 609735 South Korea;

    Pukyong Natl Univ Dept Phys Busan 608737 South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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