调整有机层厚度制作高效率的电致蓝光器件  

Fabricating the blue OLED with highly efficiency by adjusting organic layers thickness

作　　者：姜文龙[1] 王洪梅[1] 丁桂英[1] 汪津[1] 王静[1] 王立忠[1] 常喜[1] 

机构地区：[1]吉林师范大学信息技术学院,吉林四平136000

出　　处：《光电子．激光》2008年第10期1315-1318,共4页Journal of Optoelectronics·Laser

基　　金：吉林省科技发展计划资助项目(20050523);吉林省教育厅科研计划资助项目([2003]25;[2004]54;[2007]154);四平科技局计划资助项目(2005007;2006008)

摘　　要：介绍利用优化有机膜厚度的方法，制作了发光效率较高的有机电致蓝光器件。器件的结构为：ITO／2T-NATA／NPWDPVBi／TPBi／Alq3／LiF／Al，当2T-NATA，NPB，DPVBi，TPBi，Alq3，LiF的厚度分别为15nm，10nm，20nm，15nm，25nm，0．6nm时，器件的性能最好。在电压为12V，电流密度为537mA／cm^2时，亮度达到最大为13540cd／m^2。在电压为7V，电流密度为22mA／cm^2时，器件的最大电流效率为4．48cd／A。且器件的开启电压较低，在4V工作电压下，亮度达到4．82cd／m^2。电压在5～12V的范围内，发光色度几乎不随驱动电压或电流密度的改变而改变，稳定在x=0．17，y=0．16附近，处于蓝光中心区域。By optimizing the organic layers thickness of the organic blue light-emitting devices , the luminescence efficiency is improved. The device structure is ITO/2T-NATA/NPB/DPVBi/TPBi/Alq3/LiF/Al. When the thickness of 2T-NATA , NPB,DPVBi,TPBi and Alq3 is 15 nm,10 nm,20 nm,15 nm,25 nm and 0.6 nm respectively,the better performance of the devices is obtained. The maximum luminance is 13 540 cd/m^2 at the electric current density of 537 mA/cm^2 and the electric voltage of 12 V. The maximum electric current efficiency of devices is 4.48 cd/A at 22 mA/cm^2 and 7 V. And the turn on voltage of the devices is lower,the devices luminance is 4. 82 cd/m^2 at 4 V. The chroma of devices stabilizes in blue light center district of x=0.17 and y=0. 16 with the changes of the driving electric voltage and the current density in the scope with 5-12 V.

关 键 词：有机电致发光器件 性能 蓝光 

分 类 号：TN383.1[电子电信—物理电子学]