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首页> 外文期刊>Solid State Communications >Temperature-dependent emission spectra of M2SiO4 : Eu2+ (M = Ca, Sr, Ba) phosphors for green and greenish white LEDs
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Temperature-dependent emission spectra of M2SiO4 : Eu2+ (M = Ca, Sr, Ba) phosphors for green and greenish white LEDs

机译：用于绿色和绿色白色LED的M2SiO4：Eu2 +（M = Ca，Sr，Ba）荧光粉的温度相关发射光谱

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摘要

The temperature dependence of emission spectra of alkaline earth ortho-silicates M2SiO4 (M = Ca, Sr, Ba) doped with Eu2+ ions is investigated. Two emission bands of Sr2SiO4:Eu2+ show the normal redshift with broadening bandwidth and decreasing emission intensity as an increase in temperature. On the other hand, emission bands of Ca2SiO4:Eu2+ and Ba2SiO4:Eu2+ show the anomalous blueshift with increasing temperature. For Ca2SiO4:Eu2+ and Ba2SiO4:Eu2+, the temperature dependence of the emission color can be described in terms of back tunneling from the excited state of low-energy emission band to the excited state of high-energy emission band in the configuration coordinate diagram. Our phosphors have a promising potential as phosphors for green or greenish white-light-emitting diode pumped by ultraviolet chip. (C) 2004 Elsevier Ltd. All rights reserved.
机译：研究了掺有Eu2 +离子的碱土金属原硅酸盐M2SiO4（M = Ca，Sr，Ba）的发射光谱与温度的关系。 Sr2SiO4：Eu2 +的两个发射带显示正常的红移，随着温度的升高，带宽变宽，发射强度降低。另一方面，Ca2SiO4：Eu2 +和Ba2SiO4：Eu2 +的发射带随温度升高显示出异常的蓝移。对于Ca2SiO4：Eu2 +和Ba2SiO4：Eu2 +，发射颜色的温度依赖性可以在组态坐标图中用从低能发射带的激发态到高能发射带的激发态的反向隧穿来描述。作为通过紫外线芯片泵浦的绿色或绿色白色发光二极管的荧光粉，我们的荧光粉具有广阔的前景。 （C）2004 Elsevier Ltd.保留所有权利。

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