浏览全部资源
扫码关注微信
上海大学 材料科学与工程学院 上海,200444
纸质出版日期:2000-11-30,
收稿日期:2000-6-20,
扫 描 看 全 文
张志林, 蒋雪茵, 张步新, 朱文清, 赵伟明, 许少鸿. 多色有机薄膜电致发光器件及其稳定性[J]. 发光学报, 2000,21(4): 308-313
ZHANG Zhi-lin, JIANG Xue-yin, ZHANG Bu-xin, ZHU Wen-qing, ZHAO Wei-ming, XU Shao-hong. Multi Color Organic Light Emitting Diodes and its Stability[J]. Chinese Journal of Luminescence, 2000,21(4): 308-313
研究了绿色、红色、蓝色和白色四种有机薄膜电致发光器件。通过掺杂得到了高稳定性的绿色及红色器件
绿色器件的半寿命达14000h(初始亮度100cd/m
2
)
红色器件的半寿命为7500h(初始亮度50cd/m
2
)。还研究了具有空穴锁定层及非锁定层的两种不同结构的蓝色及白色器件。研究表明无论蓝色还是白色器件
具有空穴锁定层的器件稳定性较差
老化过程中界面势垒的变化很大。非锁定层的蓝色及白色器件的半寿命分别为450h(初始亮度50cd/m
2
)和300h(初始亮度50cd/m
2
)。在稳定性改善的基础上研制成功96×60线
分辨率为2线/mm的绿色矩阵显示屏
设计和研制了驱动及控制电路
实现了动态显示。
Green
red
blue and white organic light emitting diodes (OLED) were investigated. Remarkable improvement in stability has been demonstrated in doped green and red devices. For OLED with the structure ITO/CuPc/NPB/Alq:dopant/MgAg
copper phthalocyanine (CuPc) was used as a buffer layer
N
N’-bis-(1-naphthyl)-N
N’-diphenyl-1
1’-biphenyl-4
4’-diamine(NPB) as the hole transporting layer
tris(8-quinolinolato) aluminum complex (Alq) as ETL
indium tin oxide (ITO) and MgAg as the anode and cathode
respectively
coumarin545(C545) and quinacridone (QA) were used as the dopants for green device
while DCJTB was for the red device. For green OLED
the devices with two kinds of dopant were compared. It is shown that C545 doped device gives more higher luminance
however
its half life is shorter than that of QA doped cell. The QA doped green OLED achieved the long life of 14000h at initial luminance of 100cd/m
2
. The red OLED doped with red dye DCJTB showed high stability
the half decay time reached 7500h at the initial luminance 50cd/m
2
and the change of driving voltage was 0.6mV/hour in the degradation process. Two kinds of blue OLEDs with the structure ITO/CuPc/NPB/TPBi/Alq/MgAg and ITO/CuPc/NPB/DPVBi:perylene/Alq/MgAg were studied. The former was a device with blocking layer
here TPBi acts as a hole blocking layer due to the high barrier in the interface between it and NPB
the latter was conventional one. Luminance degradations of the two devices were compared.It showed that the blue cell with blocking layer had much shorter life time than that of the conventional cell.The latter showed the half decay time of 450h at the initial luminance 50cd/m
2
. Based on the above blue OLEDs
two white OLEDs were constructed. The structures were ITO/CuPc/NPB/TPBi:Rublene/Alq/MgAg and ITO/CuPc/NPB/DPVBi:perylene/Alq:DCJTB/MgAg.The same results about the luminance degradation have been obtained. The device without blocking layer had the half decay time of 300h at the initial luminance 50cd/m
2
. The white OLED with blocking layer had a short durability. It is concluded that the blocking layer is not favorable to the stability of the device
it may be attributed to the high barrier between the hole transporting and blocking layers.
有机薄膜电致发光多色稳定性
organic emitting diodemulti colorshigh stability
0
浏览量
36
下载量
2
CSCD
关联资源
相关文章
相关作者
相关机构