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1.Growth of Luminescent Crystal Na_5 Eu(WO_4)_4 and Their Spectra Property
Na_5 Eu(WO_4)_4发光晶体的生长与光谱特性收藏指正
2.ZnS、CdS are both the direct bandgap semiconductor compound. In ZnS, the Zn is replaced by Cd~2+,It arouses the descend of the bottom of the conduction bandand. So it makes the forbidden bandwidth of the luminescent crystal change, the energy level of luminescence center changes immediately, therefore the luminescence spectrum is changed continuously.
ZnS、CdS均为直接带系半导体化合物,在ZnS中以Cd~(2+)离子取代Zn~(2+)离子可引起导带底下降,使发光晶体的禁带宽度发生变化,发光中心的能级随之变化,从而可实现发光光谱的连续改变。收藏指正
3.Relationship between Luminescent Properties and Crystal Structure of Eu~(3+) in La(BO_2)_3
La(BO_2)_3基质中Eu~(3+)的发光性质与晶体结构的关系收藏指正
4.Because Eu2+ is surrounded by host ions, mixed states of 4f5d will be split by the crystal field and the luminescent wavelength will be changed.
由于Eu2+被基质离子所包围,基质离子所产生的晶体场使Eu2+离子的4f65d混合能级劈裂,从而改变发光的波长。收藏指正
5.CaSO4:RE(La,Y)them-selves could not emit fluorescent light,the addition of Y3+ and La3+ ions had no effect on crystal lattice of matrix,but could enhance the luminescent intensity of CaSO4; Eu2+.
CaSO_4:RE(La,Y)本身没有荧光,Y~(3+),La~(3+)掺入CaSO_4:Eu中未改变基质的晶型结构,但可增强CaSO_4:Eu中Eu~(2+)的荧光强度。收藏指正
6.hi this paper, the Y_2O_2S:R~(3+),Mg~(2+),Ti~(4+)(R~(3+)=Eu~(3+),Sm~(3+),Tb~(3+)) phosphors were synthesized first by co-precipitation method. Its x-ray diffraction patterns, the structure of crystal lattice and the luminescent properties were studied.
本论文采用共沉淀法合成了Y_2O_2S:R~(3+),Mg~(2+),Ti~(4+)(R~(3+)=Eu~(3+),Sm~(3+),Tb~(3+))长余辉发光材料,比较了其X射线衍射谱,分析了其晶格结构;收藏指正
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