作　　者： ; ; ; ; ;

机构地区： 江苏大学材料科学与工程学院

出　　处： 《江苏大学学报（自然科学版）》 2011年第4期464-467,共4页

摘　　要： 将有机荧光材料NPB,Alq3,DPVBi和Rubrene分别按照一定比例进行物理共混,作为物理混合层,制备了结构为ITO/物理混合层(120 nm)/LiF/Al的有机电致发光器件,研究了物理混合层中不同Rubrene比例对器件性能的影响.结果表明:随着Rubrene共混比例增加,器件色度发生相应改变,并呈现DPVBi和Rubrene发光为主,伴随部分Alq3发光的特点,来自阳极部分空穴被Ru-brene俘获,与阴极电子复合而辐射发光,其他在NPB中传输.阴极电子与阳极空穴在Alq3上形成激子,激子转移到Rubrene中而减弱了Alq3发光强度.器件的亮度和电流效率也随电压呈现规律性的变化. Blended the organic fluorescent materials of NPB,Alq3,DPVBi and Rubrene in a certain proportion,new white organic light-emitting devices（OLEDs） was fabricated with the structure of ITO/physical mixed layer（120 nm）/LiF/Al.The effect of Rubrene proportion on the performance of OLEDs was investigated.With the increase of Rubrene proportion,the device has a corresponding color change.The luminescence of the devices is mainly from DPVBi and Rubrene with subordinately from Alq3.The partial holes from anode are captured by Rubrene and combined with electron to show radioluminescence,and other holes are transferred in NPB.The excitons are formed from the combine of electrons and holes,and transfer from Alq3 to Rubrene,leading in the decrease of radioluminescence of Alq3.The brightness and current efficiency of the devices show regular change with voltage.

关 键 词： 有机发光器件 物理共混技术 荧光材料 电致发光 亮度 电流效率

领　　域： [电子电信]