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

被引：5
作者：
Liu, D
Zhen, CG
Wang, XS
Zou, DC
Zhang, BW [1 ]
Cao, Y
机构：
[1] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100101, Peoples R China
[2] Peking Univ, Coll Chem, Beijing 100871, Peoples R China
来源：
SYNTHETIC METALS | 2004年 / 146卷 / 01期
基金：
中国国家自然科学基金;
关键词：
organic light-emitting devices; N; N-di(9-ethylcarbazyl-3)-3-methylaniline; hole injecting and transporting;
D O I：
10.1016/j.synthmet.2004.06.022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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收藏
页码：85 / 89
页数：5
相关论文
共 17 条
[1]   BLUE LIGHT-EMITTING ORGANIC ELECTROLUMINESCENT DEVICES [J].
ADACHI, C ;
TSUTSUI, T ;
SAITO, S .
APPLIED PHYSICS LETTERS, 1990, 56 (09) :799-801
[2]   Degradation mechanism of small molecule-based organic light-emitting devices [J].
Aziz, H ;
Popovic, ZD ;
Hu, NX ;
Hor, AM ;
Xu, G .
SCIENCE, 1999, 283 (5409) :1900-1902
[3]   Study of organic light emitting devices with a 5,6,11,12-tetraphenylnaphthacene (rubrene)-doped hole transport layer [J].
Aziz, H ;
Popovic, ZD .
APPLIED PHYSICS LETTERS, 2002, 80 (12) :2180-2182
[4]   LIGHT-EMITTING-DIODES BASED ON CONJUGATED POLYMERS [J].
BURROUGHES, JH ;
BRADLEY, DDC ;
BROWN, AR ;
MARKS, RN ;
MACKAY, K ;
FRIEND, RH ;
BURN, PL ;
HOLMES, AB .
NATURE, 1990, 347 (6293) :539-541
[5]   Enhanced brightness and efficiency in organic electroluminescent devices using SiO2 buffer layers [J].
Deng, ZB ;
Ding, XM ;
Lee, ST ;
Gambling, WA .
APPLIED PHYSICS LETTERS, 1999, 74 (15) :2227-2229
[6]   A second-generation catalyst for aryl halide amination: Mixed secondary amines from aryl halides and primary amines catalyzed by (DPPF)PdCl2 [J].
Driver, MS ;
Hartwig, JF .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (30) :7217-7218
[7]   Bright single-active layer small-molecular organic light-emitting diodes with a polytetrafluoroethylene barrier [J].
Gao, YD ;
Wang, LD ;
Zhang, DQ ;
Duan, L ;
Dong, GF ;
Qiu, Y .
APPLIED PHYSICS LETTERS, 2003, 82 (02) :155-157
[8]  
Hartwig JF, 1998, ANGEW CHEM INT EDIT, V37, P2046, DOI 10.1002/(SICI)1521-3773(19980817)37:15<2046::AID-ANIE2046>3.0.CO
[9]  
2-L
[10]  
LIANG LS, 1997, APPL PHYS LETT, V70, P152
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