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陕西科技大学 电气与信息工程学院,陕西 西安 710021,E-mail:tigerlang@163.com
收稿日期:2009-10-31,
修回日期:1900-01-02,
网络出版日期:2010-06-30,
纸质出版日期:2010-06-30
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陆君福;张方辉;刘丁菡;蒋 谦. 多层掺杂白光有机电致发光器件的光谱稳定性[J]. 液晶与显示, 2010,25(3): 370-374
LU Jun-fu;ZHANG Fang-hui;LIU Ding-han;JIANG Qian. Electroluminescent Spectral Stability of Multilayer Doping White Organic Light-Emitting Diodes[J]. 液晶与显示, 2010,25(3): 370-374
分析了分别以Al/LiF为复合阴极和以Ca ∶ Al合金为阴极的两种掺杂型白光有机电致发光器件在不同驱动电流下的EL光谱以及色坐标的变化。器件结构分别为:Al/LiF/Alq
3
∶ C545T/Alq
3
∶ DCJTB/ADN ∶ TBP/NPB/2T-NATA/ITO/Glass;Ca ∶ Al/ Alq
3
∶ C545T/Alq
3
∶ DCJTB/AND ∶ TBP/NPB/2T-NATA/ITO/Glass。 并利用直接载流子俘获(DCT)过程和能量传递(ET)过程对器件的发光机理进行了讨论。结果发现:两种白光器件的EL光谱波峰位置几乎是相同的
且不随电流的改变而变化;在相同驱动电流下
以Al/LiF为复合阴极的器件的绝对光谱较强;随着驱动电流的变化
对于Ca ∶ Al合金为阴极的白光器件
其相对光谱及色坐标的变化相对较小
并且在较低的驱动电流下色坐标就能达到比较稳定的状态。说明以Ca ∶ Al合金为阴极有利于提高OLEDs的EL光谱的稳定性。
The electroluminescent spectra and CIE coordinate variation of doping-type white organic light-emitting devices with Al/ LiF
Ca ∶ Al as cathode are analyzed under different driving current. The devices are respectively fabricated with the structure of ITO/2T-NATA/NPB/ADN ∶ TBP/Alq
3
∶ DCJTB/Alq
3
∶ C545T/LiF/Al and ITO/2T-NATA/NPB/ADN ∶ TBP/Alq
3
∶ DCJTB/Alq
3
∶ C545T/Ca ∶ Al. Additionally
the light emitting process was discussed according to the Direct Carrier Trapping (DCT) and Energy Transfer (ET) theory. The results indicated that two different devices have similar peaks position and they have no shift as the driving current increasing. But absolute spectra of device with Al/LiF as cathode is much more intensive under the same driving current; the device with Ca ∶ Al as cathode has much slighter variation of relative spectra and CIE coordinate when the driving current changed and can reach stable state under low driving current. It indicated that Ca ∶ Al cathode contribute much to the electroluminescent stability of organic light-emitting device.
. Huang Y S, Jou J H, Weng W K,et al. High-efficiency white organic light-emitting devices with dual doped structure [J]. Appl. Phys. Lett.,2002,80(15):2782-2784.
. D Andrade B W, Thompson M E, Forrest S R. white phosphorescent organic light emitting devices[J]. Adv. Mater., 2002,14:147-151.
. 王勇,赵谡玲,徐征,等.利用多掺杂体系制备白色OLED的研究[J]. 光电子·激光 , 2007, 18(11):1286-1288,1292.
. Tang C W,VanSlyke S A, Chen C H. Electroluminescence of doped organic thin film [J]. Appl. Phys., 1989, 65(9):3610-3616.
. Hu W P, Matsumura M ,Wang M Z, et al. Red electroluminescence from an organic europium complex with a triphenylphosphine oxide ligand [J]. Jpn. J. Appl. Phys.,2000,39(11):6445-6449.
. Yu J S, Chen Z J, Sone M, et al.Red-light-emitting organic electroluminescent devices with bisanil dye as emitter[J]. Jpn. J. Appl. Phys., 2001, 40(5A):3201-3205.
. 蒋雪茵,张志林,张步新,等.稳定的光谱不随电流变化而改变的白色有机发光器件 [J]. 发光学报, 2002,23(2):165-170 .
. 李璐,于军胜,黎威志,等. 驱动电压和主体材料对染料掺杂有机电致发光器件的影响 [J]. 发光学报 ,2007,28(6):853-858.
. 牟强,王秀峰,张麦丽.空穴缓冲层2T-NATA厚度对OLED器件性能的影响 [J]. 液晶与显示 ,2008,23(6):680-683.
. 贾勇, 邓振波, 肖静,等. 电子传输层PBD对Alq3 ∶ DCJTB电致发光器件的影响 [J]. 发光学报, 2008,29(1):23-26.
. 韩世良, 袁永波, 连加荣,等. ITO阳极电阻对有机电致发光器件性能的影响 [J]. 发光学报, 2008,29(3):429-432.
. 马涛, 于军胜, 李璐,等. 基于PVK∶NPB掺杂体系的有机电致发光器件的性能 [J]. 发光学报, 2008,29(6):809-814.
. 张春玉, 陆景彬, 秦莉,等. 微腔有机电致发光白光器件设计及制作 [J]. 发光学报, 2009,30(5):596-600.
. 杨少鹏, 王利顺, 邱晓丽, 等.基于PVK的高色纯度高稳定性有机电致红光器件 [J]. 发光学报, 2009,30(6):728-733.
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