Enhancement in brightness and efficiency of organic electroluminescent device using novel N,N-di(9-ethylcarbaz-3-yl)-3-methylaniline as hole injecting and transporting material
Enhancement in brightness and efficiency of organic electroluminescent device using novel N,N-di(9-ethylcarbaz-3-yl)-3-methylaniline as hole injecting and transporting material
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使用新型N,N-二(9-乙基卡巴-3-基)-3-甲基苯胺作为空穴注入和传输材料提高有机电致发光器件的亮度和效率
DOI：
10.1016/j.synthmet.2004.06.022
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发表时间：
2004-10-14
期刊：
影响因子：
4.4
通讯作者：
Cao, Y
中科院分区：
文献类型：
--
作者：
Liu, D;Zhen, CG;Cao, Y
采用一步法合成了一种新型的空穴注入和传输材料N，N-二（9-乙基咔唑-3-基）-3-甲基苯胺（DECMA）。具有ITO/DECMA（60 nm）/NPB（10 nm）/Alq（3）（60 nm）/Mg：Ag/Ag配置的有机EL器件在3.7 V下开启，并且在20 mA cm（-2）的电流密度下显示出1150 cd m（-2）的亮度和5.5 cd A（-1）的电流效率，而具有ITO/NPB（70 nm）/Alq 3（60 nm）/Mg：Ag/Ag配置的参比器件在3.9 V下开启，并且在相同的电流密度下显示出500 cd m（-2）的亮度和2.4 cd A（-1）的电流效率。在含DECMA的器件中获得的较低的开启电压和较高的亮度和效率可以归因于由于DECMA的低电离电势而改善的阳极/有机界面处的空穴注入以及由于DECMA的适度空穴漂移迁移率而在发光层中更好地平衡空穴-电子复合。(C)2004 Elsevier B. V.保留所有权利。
A novel hole injecting and transporting material, NN-di(9-ethylcarbaz-3-yl)-3-methylaniline (DECMA), was prepared by one-step reaction for use in organic electroluminescent (EL) devices. Organic EL device with configuration of ITO/DECMA (60 nm)/NPB (10 nm)/Alq(3) (60 nm)/Mg:Ag/Ag turned on at 3.7 V and displayed a brightness of 1150 cd m(-2) and a current efficiency of 5.5 cd A(-1) at the current density of 20 mA cm(-2), while a reference device with configuration of ITO/NPB (70 nm)/Alq3 (60 nm)/Mg:Ag/Ag turned on at 3.9 V and exhibited a brightness of 500 cd m(-2) and a current efficiency of 2.4 cd A(-1) at the same current density. The lower turn on voltage and higher brightness and efficiency obtained in DECMA-containing device can be ascribed to the improved hole injection at anode/organic interface due to the low ionization potential of DECMA and the better balanced hole-electron recombination in emitting layer due to the moderate hole drift mobility of DECMA. (C) 2004 Elsevier B.V. All rights reserved.