【摘要】 在聚2,7-(9,9-二辛基)芴(PFO)和30%的2-(对联苯基)-5-(对叔丁基苯基)-1,3,4-二唑(PBD)主体材料中掺杂短磷光寿命的meso-四(对正葵酰氧基苯基)卟啉铂(TDPPPt),制成聚合物基发光器件。器件结构为:ITO/PEDOT∶PSS/PVK/PFO+30%PBD∶TDPPPt/Ca/Al(ITO:氧化铟锡;PEDOT:聚3,4-乙撑二氧噻吩;PSS:聚苯乙烯磺酸盐;PVK:聚乙烯基咔唑)。当客体掺杂浓度≥3%时,器件给出饱和的红色发射。当驱动电压从7 V升高至14 V时,器件发光色度保持不变,CIE(国际发光照明委员会)色坐标稳定在(0.66,0.28)左右。器件的最大亮度和电流效率分别为1 390 cd/m2和1.34 cd/A。在电流密度100×10-3和150×10-3 A/cm2时,电流效率分别为1.18和0.99 cd/A,器件在高电流密度下具有良好的稳定性。更多还原

【Abstract】 The saturated red polymer electrophosphorescent devices have been fabricated.With the device structures of ITO/PEDOT∶ PSS/PVK/PFO+30%PBD∶ TDPPPt/Ca/Al(ITO:indium tin oxide,PEDOT:poly(3,4-ethylenedioxythiophene),PSS:poly(styrenesulfonate),PVK:poly N-vinyl carbazole),based on short lifetime meso-tetrakis(4-n-decanoyl-phenyl) porphyrin platinum(Ⅱ) complex(TDPPPt) and poly(2,7-9,9-dioctylfluorene)(PFO) in which 30% 2-(bi-phenyl-4-yl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole(PBD) was doped.The saturated red emission is obtained when doping concentration of TDPPPt is 3%~10%.The CIE(Commission Internationale de L′Eclairage) coordinates of the device is about at(0.66,0.28) and unchangeable when driven voltage increases from 7 V to 14 V.The maximum luminance and luminance efficiency(ηl) is 1 390 cd/m2 at 18 V and 1.34 cd/A at 18×10-3 A/cm2,respectively.Furthermore,the devices show excellent stability under high driven current density.ηl only drops to 88% and 73% of maximum efficiency at 100×10-3 A/cm2,and 150×10-3 A/cm2,respectively.We tentatively attribute excellent devices stability under high driven current density to the short radiative lifetime that avoids triplet-triple annihilation.更多还原