TY - JOUR
T1 - Efficient yellow-green light-emitting cationic iridium complexes based on 1,10-phenanthroline derivatives containing oxadiazole-triphenylamine unit
AU - Tang, Huaijun
AU - Li, Yanhu
AU - Chen, Qiliang
AU - Chen, Bing
AU - Qiao, Qiquan
AU - Yang, Wei
AU - Wu, Hongbin
AU - Cao, Yong
N1 - Funding Information:
This work was supported by China Postdoctoral Science Foundation (No. 20090450858 ), National Nature Science Foundation of China (No. 21262046 ), Key Scientific Research Fund Supported by Education Department of Yunnan Province (No. 2011Z003 ), Youth Fund of Yunnan Universities of Nationalities (No. 11QN05 ), and State Key Basic Research Project of China (No. 2009CB623602 ).
PY - 2014
Y1 - 2014
N2 - Cationic iridium(III) complexes with 1,10-phenanthroline (phen) derivatives containing oxadiazole-triphenylamine, oxadiazole or triphenylamine unit used as neutral auxiliary ligands, with the formula of [Ir(ppy)2(op-phen)] [PF6] (C1), [Ir(ppy)2(o-phen)][PF6] (C2), and [Ir(ppy)2(p-phen)][PF6] (C3) (ppy = 2-phenylpyridine) were synthesized, respectively. The complexes exhibit high thermal stability and were used as phosphorescent dopants in polymer light-emitting diodes (PLEDs) with the configuration of ITO/PEDOT: PSS/PVK (70): PBD (30): complex (x, wt.%)/TPBI/CsF/Al. The complexes C1, C2 and C3 exhibit high electroluminescent performances with the maximum luminance efficiencies of 30.6 cd/A, 28.4 cd/A and 26.3 cd/A, respectively. The Commission Internationale de L'Eclairage (CIE) color coordinates of all complexes are (0.41, 0.55) corresponding to the yellow-green region. The complex C1 containing bipolar unit of oxadiazole-triphenylamine exhibits higher efficiency due to its balance of hole and electron fluxes.
AB - Cationic iridium(III) complexes with 1,10-phenanthroline (phen) derivatives containing oxadiazole-triphenylamine, oxadiazole or triphenylamine unit used as neutral auxiliary ligands, with the formula of [Ir(ppy)2(op-phen)] [PF6] (C1), [Ir(ppy)2(o-phen)][PF6] (C2), and [Ir(ppy)2(p-phen)][PF6] (C3) (ppy = 2-phenylpyridine) were synthesized, respectively. The complexes exhibit high thermal stability and were used as phosphorescent dopants in polymer light-emitting diodes (PLEDs) with the configuration of ITO/PEDOT: PSS/PVK (70): PBD (30): complex (x, wt.%)/TPBI/CsF/Al. The complexes C1, C2 and C3 exhibit high electroluminescent performances with the maximum luminance efficiencies of 30.6 cd/A, 28.4 cd/A and 26.3 cd/A, respectively. The Commission Internationale de L'Eclairage (CIE) color coordinates of all complexes are (0.41, 0.55) corresponding to the yellow-green region. The complex C1 containing bipolar unit of oxadiazole-triphenylamine exhibits higher efficiency due to its balance of hole and electron fluxes.
KW - Cationic iridium complex
KW - Oxadiazole
KW - Phenanthroline
KW - Polymer light-emitting diode
KW - Triphenylamine
KW - Yellow-green emission
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U2 - 10.1016/j.dyepig.2013.07.029
DO - 10.1016/j.dyepig.2013.07.029
M3 - Article
AN - SCOPUS:84882364670
SN - 0143-7208
VL - 100
SP - 79
EP - 86
JO - Dyes and Pigments
JF - Dyes and Pigments
IS - 1
ER -