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首页> 外文期刊>RSC Advances >Chemical bond parameters, bond energy and the local crystal sites of Eu3+ in Ca-5(BO3)(3)F:1% Eu3+ phosphor
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Chemical bond parameters, bond energy and the local crystal sites of Eu3+ in Ca-5(BO3)(3)F:1% Eu3+ phosphor

机译：Ca-5（BO3）（3）F：1％Eu3 +磷光体中的化学键参数，粘合能量和Eu3 +的局部晶体位点

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摘要

The local crystal sites occupied by Eu3+ in Ca-5(BO3)(3)F:1% Eu3+ phosphor were investigated experimentally and theoretically. Ca-5(BO3)(3)F:1% Eu3+ was synthesized by high-temperature solid-state method in air. The crystal structure and optical properties of the phosphor were studied by X-ray powder diffraction and photoluminescence, respectively. Two different O2- - Eu3+ CT broad bands with the peaks at 266 and 283 nm in Ca-5(BO3)(3)F:1% Eu3+ were detected, indicating the Eu3+ sites occupied Ca2 and Ca1, respectively. The different sharp f-f emission spectra under the excitation of 283 and 266 nm proved that there are two different local lattice environments around Eu3+ existing in Ca-5(BO3)(3)F:1% Eu3+. Environmental factor h(e), the standard deviation of environmental factor (EFSD) sigma(h(ei)) and the bond energy were used to illustrate and explain the site occupancy mechanism of Eu3+ into the host lattice. By comparing the intensity ratios of D-5(0) - F-7(2) transition to the D-5(0) - F-7(1) transition, I(D-5(0)/F-7(2))/I(D-5(0)/F-7(1)) of Eu3+ at Ca2 (7.381) was found to be 2.5 times stronger than that of Eu3+ at Ca1 site (2.933). sigma(h(ei)) was calculated to analyze the I(D-5(0)/F-7(2))/I(D-5(0)/F-7(1)) value. On the basis of the bond valence model, a bond-energy method was used to study the occupancy of the Eu ion, which indicated that the preferential sites of Eu ion occupancy in the Ca-5(BO3)(3)F are the Ca2 and Ca1 sites. All three theoretical calculation results are consistent with each other.
机译：通过实验和理论地研究了CA-5（BO3）（3）F：1％EU3 +磷光体中的Eu3 +占局部晶体位点。通过在空气中通过高温固态方法合成Ca-5（Bo3）（3）F：1％Eu3 +。通过X射线粉末衍射和光致发光地研究了磷光体的晶体结构和光学性质。两种不同的O2-＆ eu3 + CT宽带在266和283nm处检测到Ca-5（Bo3）（3）F：1％Eu3 +的峰，表明Eu3 +位点分别占据Ca2和Ca1。在283和266nm的激励下的不同锐意的F-F发射光谱证明了在Ca-5（Bo3）（3）F：1％Eu3 +中存在两种不同的局部晶格环境。环境因子H（e），用于环境因子（EFSD）Sigma（H（EI））和粘合能量的标准偏差，用于说明和解释Eu3 +进入宿主格子的地点占用机制。通过比较D-5（0）的强度比 - ＆ F-7（2）过渡到D-5（0） - ＆发现F-7（1）转变，发现Eu3 +的I（D-5（0）/ F-7（2））/ I（D-5（0）/ F-7（1））被发现（7.381）比CA1网站（2.933）的EU3 +强的2.5倍。西格玛（H（EI））计算以分析I（d-5（0）/ F-7（2））/ I（d-5（0）/ F-7（1））的值。在键合价模型的基础上，使用键 - 能量法研究EU离子的占用，表明，Ca-5（BO3）（3）F中的EU离子占用的优先位点是CA2和ca1网站。所有三种理论计算结果彼此一致。

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

    Zhu Yuhan; Pan Yu; Wang Wenjun; Xu Haibing; Zhou Liqun; Liu Xiaoguang; Li Ling;

  • 作者单位

    Hubei Univ Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Of Educ Key Lab Synth &

    Applicat Organ Funct Mol Wuhan Hubei Peoples R China;

    Hubei Univ Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Of Educ Key Lab Synth &

    Applicat Organ Funct Mol Wuhan Hubei Peoples R China;

    Hubei Univ Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Of Educ Key Lab Synth &

    Applicat Organ Funct Mol Wuhan Hubei Peoples R China;

    Hubei Univ Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Of Educ Key Lab Synth &

    Applicat Organ Funct Mol Wuhan Hubei Peoples R China;

    Hubei Univ Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Of Educ Key Lab Synth &

    Applicat Organ Funct Mol Wuhan Hubei Peoples R China;

    Hubei Univ Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Of Educ Key Lab Synth &

    Applicat Organ Funct Mol Wuhan Hubei Peoples R China;

    Hubei Univ Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Of Educ Key Lab Synth &

    Applicat Organ Funct Mol Wuhan Hubei Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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