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首页> 外文期刊>Journal of Materials Science >Controllable white light emission from Dy3+–Eu3+ co-doped KCaBO3 phosphor
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Controllable white light emission from Dy3+–Eu3+ co-doped KCaBO3 phosphor

机译：Dy3 + –Eu3 + 共掺杂的KCaBO3 荧光粉可控的白光发射

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摘要

Potassium calcium borate, KCaBO3:Eu3+ phosphors with various Dy3+ concentrations (0–3 wt%) were synthesized by solid state reaction and studied for the first time. Under various UV–violet excitations, the obtained single monoclinic phased Dy3+–Eu3+ co-doped KCaBO3 polycrystalline phosphors emit a combination of yellow–blue and red–orange wavelength giving intense white light, which can easily be controlled by varying the concentration of Dy3+. The increase in white light emission with the increase of Dy3+ concentration indicates the efficient energy inter-ion transfer from Dy3+ to Eu3+ ions. Furthermore, the observed emission lifetimes and the intense white light emission are suggestive exploration for the present phosphor for potential optoelectronic applications such as white light-emitting phosphor for blue LEDs chips.
机译：通过固相反应合成了Dy3 + 浓度（0–3 wt％）的硼酸钾钙，KCaBO3 ：Eu3 + 荧光粉并进行了首次研究。在各种紫外线-紫外线激发下，获得的单斜相Dy3 + -Eu3 + 共掺杂的KCaBO3 多晶磷光体发出黄蓝色和红橙色波长的组合，发出强烈的白光，通过改变Dy3 +的浓度可以很容易地控制。随着Dy3 + 浓度的增加，白光发射的增加表明Dy3 + 离子向Eu3 + 离子的有效能量转移。此外，观察到的发射寿命和强烈的白光发射对于用于潜在的光电应用的本发明的磷光体（例如用于蓝色LED芯片的发射白光的磷光体）是具有启发性的探索。

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  • 来源
    《Journal of Materials Science》 |2011年第24期|p.7770-7775|共6页
  • 作者

    Subrata Das; A. Amarnath Reddy; S. Surendra Babu; G. Vijaya Prakash;

  • 作者单位

    Nanophotonics Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi, 110016, India;

    Nanophotonics Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi, 110016, India;

    Laser Instrumentation Design Centre, Instrument Research and Development Establishment, Dehradun, 248008, India;

    Nanophotonics Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi, 110016, India;

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