铕镧共掺稀土配合物Eu_(0.5)La_(0.5)(TTA)_3phen与PVK共混体系发光特性的研究  

Electroluminescence Based on Eu_(0.5)La_(0.5)(TTA)_3phen Doped Poly(N-Vinylcarbazole)

作　　者：程宝妹[1] 邓振波[1] 梁春军[1] 张元元[1] 郝金刚[1] 徐登辉[1] 肖静[1] 王瑞芬[2] 

机构地区：[1]北京交通大学光电子技术研究所信息存储显示与材料开放实验室,北京100044 [2]河北师范大学化学与材料科学学院,河北石家庄050016

出　　处：《中国稀土学报》2006年第4期399-402,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(90201004);北京市科委资助项目(H030430020410);河北省自然科学基金资助项目(203148)

摘　　要：合成了一种新型的稀土铕配合物Eu0.5La0.5(TTA)3phen,把它作为发光材料应用于有机电致发光中。把铕配合物与高分子导电聚合物共混制得混合溶液,然后用旋涂的方法制得了发光层。实验中制备了单层、双层器件,讨论了器件的优化条件,并用能级图探讨了Eu0.5La0.5(TTA)3phen与PVK共混体系光致、电致发光的能量传递机制。优化后的双层器件,开启电压为6.5 V,在电压12.5 V,电流密度为68.48mA.cm-2时器件达到最大亮度238.4 cd.m-2,发光效率0.35 cd.A-1。A new rare earth complex Eu0.5La0.5 （TTA）3phen was synthesized, which was used as an emitting material in electroluminescence. By doping it into the poly N-vinylcarbazole （PVK）, monolayer and double-layer devices were fabricated. Both the optimized conditions and the characteristics of these devices were investigated. And their energy transfer meehanism was explained through energy band diagram. Sharp-band red emissions of the optimized doublelayer devices with turn-on voltage of 6.5 V are achieved. At the current density of 68.48 mA·cm^-2, the maximum brightness and the current efficiency reach 238.4 cd·m^-1 and 0.35 cd·A^-1, respectively.

关 键 词：铕配合物 电致发光 能量传递 稀土 

分 类 号：O482.31[理学—固体物理] O641.4[理学—物理]