摘要
:白色有机发光器件由于在其上加彩色滤光片可容易地达到全彩效果而备受关注 ,本文通过两种不同结构及掺杂的器件 ,实现了白色有机电致发光。一种为具有空穴锁定层并在其中掺杂的器件 ;另一种为蓝色染料和红色染料分别加在发光层与电子传输层中的普通 3层结构器件。结构分别为 ITO/ NPB/TPBi:Rubrene/ Alq/ Mg:Ag和 ITO/ NPB/ DPVBi:Perylene/ Alq:DCJTB/ Mg:Ag。具有空穴锁定层的器件和普通型器件的最大亮度、最大流明效率、色度分别为 86 35 cd/ m2、0 .85 lm/ W、( x=0 .31,y=0 .32 )和 4946 cd/ m2 、1.39lm/ W、( x=0 .34,y=0 .31)。然而器件的稳定性在相同电流密度的条件下却相差10倍 ,空穴锁定层的器件寿命远小于普通型的。
Two kinds of white emission were reported. One was constructed with a doped blocking layer, another was conventional three-layer structure with blue dye in the emissive layer and red dye in the electron transport layer. The structure of the devices are ITO/NPB/TPBi: Rubrene/Alq/Mg: Ag and ITO/NPB/DPVBi: Perylene/Alq: DCJTB/Mg: Ag. Their highest luminance, the maximum efficiency, the CIE coordinate are 8635 cd/m2, 0.85 lm/W, (X=0.31, y=0.32) and 4946 cd/m2, 1.39 lm/W, (x=0.34, y=0.31) respectively. However, the durabilities of luminance under a constant driving current density (6 mA/cm2) increases by a factor of about 10. The running lifetime of the device with blocking layer is shorter than the conventional device's. The reasons of the difference are discussed based on tunnelling theory and the energy-level diagram of the device.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2001年第2期112-115,共4页
Journal of Optoelectronics·Laser
基金
国家自然科学基金资助项目 !( 5 9790 0 5 0 )
上海市科技发展基金资助项目! ( 99JC14 0 0 7)
上海市教委资助项目
