发光学报2007，Vol.28Issue(3)：437-439,3.
有机电致发光器件中观察到的三重态-三重态湮灭导致的荧光发射
Direct Observation of Enhanced Electrofluorescence Emission through Triplet-triplet Annihilation in Organic Light-emitting Devices
摘要
Abstract
With N,N'-dimethyl-quinacridone (DMQA) heavily doped into tris-(8-hydroxyquinoline) aluminum (Alq3) as emission layer, a super-linear luminance enhancement with the increase of current density in organic light-emitting devices was observed. When the concentration of DMQA was 1.6%～5.6%(in mass fraction) and the current density excess 300 mA/cm2, contrary to the roll-off in electroluminescence (EL) efficiency, the EL efficiency ascends with current density. About ～0.22 cd/A enhanced EL efficiency is observed from 300 mA/cm2 to 700 mA/cm2, which is believed to be contributed to the extra regenerated singlet excitons resulted from T*-T* annihilation.关键词
三重态-三重态湮灭/DMQA/有机电致发光Key words
T*-T* annihilation/DMQA/OLEDs分类
信息技术与安全科学引用本文复制引用
苏文明,李文连,孔治国,朱键卓,杨栋芳..有机电致发光器件中观察到的三重态-三重态湮灭导致的荧光发射[J].发光学报,2007,28(3):437-439,3.基金项目
Project supported by the National Natural Science Foundation of China(90201012) （90201012）
国家自然科学基金资助项目(90201012) （90201012）
