摘要
为了研究掺杂发光体对红色有机电致发光二极管的增强效果,将DCJTB和C545T分别掺入Alq3,制备了双发光层的OLED器件,器件结构为玻璃/ITO/4 ,4′,4″-tris[2-naphthylphenyl-1-phenylamino]triphenyla-mine (2T-NATA)/N,N′-di (naphthalene-1-yl)-N,N′-diphenyl benzidine ( NPB)/tris-(8-hydroxyquinoline)aluminum ( Alq3):4-(dicyanomethylene)-2-tert-butyl-6 (1 ,7 ,7 ,7-tetramethyljulolidin-4-yl-vinyl)-4 H-pyran(DCJTB)/Alq3:10-(2-benzothiazolyl)-2 ,3 ,6 ,7-tetrahydro-1 ,1 ,7 ,7 ,-tetramethyl-1 H,5 H,11 H-(1)-benzopy-ropyrano-(6 ,7-8-i ,j)quinolizin-11-one (C545T)/Alq3/LiF/Al ,并且将其与单发光层的红、绿光器件相比较。实验结果表明,与单发光层的红光器件相比,加入绿光发光层的红光器件的发光特性被增强了,这种双发光层器件的最优掺杂比例为[Alq3:(2 .5 %)C545T]/[ Alq3:(1 .5 %)DCJTB](质量分数) ,在电压为11 .5 V时得到最大发光亮度为6 830 cd/ m2,在11 V电压时能得到4 .59 cd/A的最大电流效率。但是,这种方法的缺点是削弱了红光的色纯度。
Organic Light Emitting Diodes （OLEDs）with two emitters,doping DCJTB and C545T into Alq3 to form a double emitting layers respectively,were presented to investigate enhancement of doped emitter on performance of red organic light emitting diodes.The devices structure used are：Glass/ITO/4,4′,4″-tris[2-naphthylphenyl-1-phenylamino]triphenylamine （2T-NATA）/N,N′-di（naphthalene-1-yl）-N,N′-diphenyl benzidine （NPB）/Tris-（8-hydroxyquinoline） aluminum （Alq3）：4-（dicyanomethylene）-2-tert-butyl-6（1,7,7,7-tetramethyljulolidin-4-yl-vinyl）-4H-pyran（DCJTB）/Alq3：10-（2-benzothiazolyl）-2,3,6,7-tetrahydro-1,1,7,7,-tetramethyl-1H,5H,11H-（1）-benzopyropyrano-（6,7-8-i,j）quinolizin-11-one （C545T）/Alq3/LiF/Al,and the devices were compared with single emitting-layer red and green devices.The results indicated the red emission was indeed enhanced by the green emitter as comparing with the single emitting-layer red organic light emitting devices,and the optimal doping proportion for green emitter enhanced red device is [Alq3：（1.5%）DCJTB]/[Alq3：（2.5%）C545T]（mass fraction）,which exhibited a maximum brightness of 6 830 cd/m2 at a voltage of 11.5 V,a maximum current efficiency of 4.59 cd/A at a voltage of 11 V,respectively,yet the means sacrifice the color purity of red light.
出处
《液晶与显示》
CAS
CSCD
北大核心
2010年第3期364-369,共6页
Chinese Journal of Liquid Crystals and Displays
基金
浙江省温州市科技计划项目(No.H20080004)
陕西省教育厅专项科研项目(No.07JK191)
陕西省“13115”显示器工程中建设项目(No.20072DGC-07)
关键词
红光OLEDs
增强
双发光层
效率
亮度
red emission
enhancement
double-emitting layer
efficiency
luminance
