掺杂Eu^(2+)的新型锶铝复合硫氧化物红色发光材料

New Red-Emitting Eu^(2+)-Doped Strontium-Aluminium Composite Oxysulfide Phosphorescent Materials

合成了掺杂Eu2+的新型锶铝复合硫氧化物红色发光材料Sr5Al2O7S∶Eu。用粉末X射线衍射法表征了其晶体结构,计算的晶胞参数为:单斜晶系,a=0.90748(41)nm,b=0.71029(25)nm,c=0.63021(26)nm,β=103.588(41)°,V=0.39485(23)nm。研究了其激发光谱、发射光谱和余辉光谱。发射光谱峰值位于586nm处,半宽度为50nm;激发带主要在可见区,峰值位于500nm处。讨论了Eu的添加量、基质组成、S的含量等与荧光强度的关系。

The red long afterglow materials of Sr5Al2O7S:Eu2+ was synthesized. The crystal structure was characterized by powder Xray diffraction. The calculated lattice parameters are: monoclinic, a=0.90748(41) nm, b=0.71029(25) nm, c=063021(26) nm, β=0.103588(41)°, V=0.39485(23) nm. The excitation, emission and afterglow spectra were investigated. The emission peak is at 586 nm, and halfpeak breadth is 50 nm. Excitation band chiefly lies in visible range, which maximum peak is at 500 nm. The dependences of luminescent intensity on the Eudoped quantity, ratio are discussed sulfur content and Al/Sr ratio are discussed.