【摘 要】
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Eu3+ doped CaMoO4 phosphors were synthesized by using the solid state reaction method.The x-ray diffraction shows that all the pattes of the obtained samples ar
【机 构】
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School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 5100
论文部分内容阅读
Eu3+ doped CaMoO4 phosphors were synthesized by using the solid state reaction method.The x-ray diffraction shows that all the pattes of the obtained samples are indexed to the sheelite structure.Red afterglow originating from the 5D0-7FJ (J =0,1,2,3,4) transitions of Eu3+ was observed after the samples were excited by 254nm and the optimal Eu3+ concentration in the CaMoO4 matrix was experimentally determined to be 0.50％.A possible explanation of this afterglow property is also discussed.Long afterglow phosphors are types of energystoring materials,which can absorb energy under excitation sources such as sunlight or an artificial lamp,and gradually emit the absorbed energy by means of visible light after the excitation source is tued off.
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