Highly efficient red electrophosphorescence from a solution-processed zwitterionic cyclometalated iridium(III) complex

被引:23
作者
Byun, Younghun
Lyu, Yi-Yeol
Das, Rupasree Ragini
Kwon, Ohyun
Lee, Tae-Woo
Park, Young Ja
机构
[1] Samsung Adv Inst Technol, Yongin 446712, Gyeonggi Do, South Korea
[2] Sookmyung Womens Univ, Dept Chem, Seoul 140742, South Korea
关键词
D O I
10.1063/1.2809375
中图分类号
O59 [应用物理学];
学科分类号
摘要
A mononuclear red-emitting zwitterionic iridium(III) complex, bis(1-(phenyl)isoquinolinato) iridium(III) (2,2(')-bipyridine-3-ol-3(')-olate), was synthesized and used as a triplet emitter doped in a polymeric host in solution-processed electrophosphorescent light-emitting diodes. We achieved a high luminous effieciency (LE) of 12.62 cd/A with fast response time in the device using the dopant unlike in the device using cationic irridium(III) phosphorescent materials. A hole transporting polymeric interlayer between the anode and the emitting layer improved the LE and decreased the exciton quenching at high electric fields. (C) 2007 American Institute of Physics.
引用
收藏
页数:3
相关论文
共 20 条
[1]   Nearly 100% internal phosphorescence efficiency in an organic light-emitting device [J].
Adachi, C ;
Baldo, MA ;
Thompson, ME ;
Forrest, SR .
JOURNAL OF APPLIED PHYSICS, 2001, 90 (10) :5048-5051
[2]   Electroluminescence mechanisms in organic light emitting devices employing a europium chelate doped in a wide energy gap bipolar conducting host [J].
Adachi, C ;
Baldo, MA ;
Forrest, SR .
JOURNAL OF APPLIED PHYSICS, 2000, 87 (11) :8049-8055
[3]   Very high-efficiency green organic light-emitting devices based on electrophosphorescence [J].
Baldo, MA ;
Lamansky, S ;
Burrows, PE ;
Thompson, ME ;
Forrest, SR .
APPLIED PHYSICS LETTERS, 1999, 75 (01) :4-6
[4]   Highly efficient phosphorescent emission from organic electroluminescent devices [J].
Baldo, MA ;
O'Brien, DF ;
You, Y ;
Shoustikov, A ;
Sibley, S ;
Thompson, ME ;
Forrest, SR .
NATURE, 1998, 395 (6698) :151-154
[5]  
COPPO P, 2004, CHEM COMMUN, P17444
[6]   Electrophosphorescence from a polymer guest-host system with an iridium complex as guest: Forster energy transfer and charge trapping [J].
Gong, X ;
Ostrowski, JC ;
Moses, D ;
Bazan, GC ;
Heeger, AJ .
ADVANCED FUNCTIONAL MATERIALS, 2003, 13 (06) :439-444
[7]   New trends in the use of transition metal-ligand complexes for applications in electroluminescent devices [J].
Holder, E ;
Langeveld, BMW ;
Schubert, US .
ADVANCED MATERIALS, 2005, 17 (09) :1109-1121
[8]   SINGLE-LAYER WHITE LIGHT-EMITTING ORGANIC ELECTROLUMINESCENT DEVICES BASED ON DYE-DISPERSED POLY(N-VINYLCARBAZOLE) [J].
KIDO, J ;
SHIONOYA, H ;
NAGAI, K .
APPLIED PHYSICS LETTERS, 1995, 67 (16) :2281-2283
[9]   Spin-cast thin semiconducting polymer interlayer for improving device efficiency of polymer light-emitting diodes [J].
Kim, JS ;
Friend, RH ;
Grizzi, I ;
Burroughes, JH .
APPLIED PHYSICS LETTERS, 2005, 87 (02)
[10]   Synthesis and characterization of phosphorescent cyclometalated iridium complexes [J].
Lamansky, S ;
Djurovich, P ;
Murphy, D ;
Abdel-Razzaq, F ;
Kwong, R ;
Tsyba, I ;
Bortz, M ;
Mui, B ;
Bau, R ;
Thompson, ME .
INORGANIC CHEMISTRY, 2001, 40 (07) :1704-1711