摘要
采用聚合物掺杂的方式,利用旋涂工艺制备了ITO/PVK:TOPPt/BCP(20 nm)/Mg:Ag(200 nm)结构的有机电致发光器件(OLED)。对掺杂浓度为2%(器件A)和4%(器件B)的磷光聚合物掺杂体系的光致发光(PL)和电致发光(EL)性质进行了分析研究,并对主体材料PVK到磷光客体材料TOPPPt的能量传递机制进行了讨论。实验表明,器件的EL谱谱峰位于625 nm,器件A在25 V时最大亮度为3037 cd/m2,最大电流效率为3.15cd/A。器件的EL谱不会随着偏置电压和掺杂浓度而改变,器件具有较好的稳定性。
A new phosphorescent material with the structure of ITO/PVK：TOPPPt/BCP（20 nm）/Mg：Ag（200 nm） is fabricated based on Pt complex.The polymer doped organic light-emitting diodes with the concentrations of 2% and 4% are studied respectively.The relative characteristics of the devices are studied.The results show that the peak at 625 nm is the emission spectrum of TOPPPt,and the emission spectrum of TOPPPt almost have no change at different driving voltages and the electro-phosphorescent characteristics of TOPPPt is very stable.The highest brightness of phosphorescent device with the doped concentration of 2%,is 3 037 cd/m2 under the driving voltage of 25 V,the highest current efficiency is 3.15 cd/A.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2010年第6期829-832,共4页
Journal of Optoelectronics·Laser
基金
国家自然科学基金资助项目(20472060)
