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Eu^3+在(GdO)3BO3中的发光特性 总被引:2,自引:0,他引:2
研究了紫外光(UV)和阴极射线(CR)激发下(GdO)_3BO_3:Eu的发光特性及其光谱随组成和结构变化的规律。在这两种激发条件下,(GdO)_3PO_3中的Eu ̄(3+)均能发出明亮的红色荧光。CR激发下,在加速电压10~20kV、电流密度1~5μA/cm ̄2内,Eu ̄(3+)的发光亮度与电压或电流密度之间均呈良好的线性关系,并具有耐电子束轰击的能力。根据395nmUV激发下(Gd_(1-x)EuxO)_3BO_3体系中Eu ̄(3+)的5D_1→ ̄7F_1跃迁(535nm)及 ̄5D_o→ ̄7F_2跃迁(611nm)发射强度与Eu ̄(3+)浓度的关系,证明其浓度猝灭机理分别为电偶极-电偶极相互作用和交换作用。 相似文献
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Under the excitation of UV light and cathode ray,the dependence of the excitation and emission spectraand luminescent lifetime of Eu~(3+)and Bi~(3+)on composition and structure in LABO_3 and GdBO_3 has been stu-died.The results indicate that the emission spectra of Eu~(3+)in LaBO_3 with aragonite structure and in GdBO_3with YBO_3 structure are quite different.Under 254 nm excitation,Eu~(3+)emission is sensitized by Bi~(3+)inGdBO_3 matrix.In other case Eu~(3+)emission is quenched by Bi(3+). 相似文献
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This paper studies photo-,cathodo-and X-ray luminescence of Ce~(3 ) and Dy~(3 )mono-doped LABO_3samples or Ce~(3 ),Dy~(3 ) codoped LaBO_3 samples and the dependence of Ce~(3 ) and Dy~(3 ) luminescent intensi-ties on compositions.The results obtained indicate that Ce~(3 ) can sensitize well the luminescence of Dy~(3 ) un-der UV excitation and quench markedly it under CR and XR excitation.This paper also studies the concen-tration dependence of emission intensity of Dy~(3 ) under the excitation of peak wavelength of 352 nm,con-firming that the mechanism of concentration self-quenching of Dy~(3 ) is a dipole-dipole interaction and themechanism of the energy transfer from Ce~(3 ) to Dy~(3 ) is a resonant transfer in which electric multipoleinteraction plays a leading role. 相似文献
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Ca3La3(BO3)5基质中Tb^3+的光致发光 总被引:1,自引:0,他引:1
在254nm紫外光激发下,研究了Ca3La3(BO3)5基质中Tb^3+的激发光谱,发光光谱、发光寿命与Tb^3+的4f^8→4f^75d^1允许迁的激发带位于230~260nm光谱区,故Tb^3+能很好地吸收激活能而发光,成为一种有发展前途的绿粉。Ce^3+可能与Tb^3+争夺激活能而猝灭Tb^3+的发光,一定量的Dy^3+能敏化Tb^3+的发光。 相似文献
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REBO_3基质中Sm ̄(3+)的阴极射线发光特性郭凤瑜彭夷安(北京大学100871)(湖南医学专科学校)REBO_3(RB=La、Gd、Y)是一类优良的发光材料的基质。对于REBO_3中稀土离子(如Ce ̄(3+)、Pr ̄(3+)、Sm ̄(3+)、E... 相似文献
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SynthesisandStructuralInvestigationof(LaO)_3BO_3withEu~(3+)asLuminescentProbePengYi'an(彭夷安);LiQihua(李其华)(HunanMedicalCollege,C?.. 相似文献
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