XU Mao-liang, LI Wen-lian, LI Ming-tao, WANG Ge-yang, ZHOU Rui, DU Wei-song. A New Iridium Complex with Trifluoromethyl-Substituted 2-benzo[b]thiophen-2-yl-pyridine Ligand and Its Application in OLEDs[J]. Chinese Journal of Luminescence, 2007,28(3): 433-436
XU Mao-liang, LI Wen-lian, LI Ming-tao, WANG Ge-yang, ZHOU Rui, DU Wei-song. A New Iridium Complex with Trifluoromethyl-Substituted 2-benzo[b]thiophen-2-yl-pyridine Ligand and Its Application in OLEDs[J]. Chinese Journal of Luminescence, 2007,28(3): 433-436DOI:
A New Iridium Complex with Trifluoromethyl-Substituted 2-benzo[b]thiophen-2-yl-pyridine Ligand and Its Application in OLEDs
By introducing a trifluoromethyl group on 5-position of the pyridyl ring of 2-benzo[b]thiophen-2-yl-pyridine
a new red emission iridium complex [(btfmp)
2
Ir(pic)] using pyridyl-2-carboxylic acid as ancilary ligand was synthesized and characterized. We observed that a CF
3
substituent on the 5-position of the ligand can decrease in the bandgap between the HOMO and LUMO levels
so as to result in large red shift of the emission band
but pyridyl-2-carboxylic acid acted as the ancilary ligand lead to emission shifting to blue. As a result saturated red light emitting EL based on red emission at 637nm from the iridium complex was observed
a peak luminance efficiency of 3.0cd/A
and the CIE color coordinates of (
x
=0.65
y
=0.29) which are almost not changed under the varied driving current were obtained.
关键词
铱(Ⅲ)配合物红色电致磷光材料有机电致发光器件
Keywords
iridium(Ⅲ) complexred electrophosphorescenceOLEDs
references
Baldo M A,O'Brien D F,You Y,et al.Highly efficient phosphorescent emission from organic electroluminescent devices[J].Nature,1998,395:151-154.
O'Brien D F,Baldo M A,Thompson M E,et al.Improved energy transfer in electrophosphorescent devices[J].Appl.Phys.Lett.,1999,74(3):442-444.
Baldo M A,Thompson M E,Forrest S R.High-efficiency fluorescent organic light-emitting devices using a phosphorescent sensitizer[J].Nature,2000,403:750-753.
Xie H Z,Liu M W,Wang O Y,et al.Reduction of self-quenching effect in organic electrophosphorescence emitting devices via the use of sterically hindered spacers in phosphorescence molecules[J].Adv.Mater.,2001,13(16):1245-1248.
Lamansky S,Djurovich P,Murphy D,et al.Synthesis and characterization of phosphorescent cyclometalated iridium complexes[J].Inorg.Chem.,2001,40(7):1704-1711.
Brooks J,Babayan Y,Lamansky S,et al.Synthesis and characterization of phosphorescent cyclometalated platnium complexes[J].Inorg.Chem.,2002,41(12):3055-3066.
Adachi C,Baldo M A,Forrest S R,et al.High-efficiency red electrophosphorescence devices[J].Appl.Phys.Lett.,2001,78(11):1622-1624.
Baldo M A,Lamansky S,Burrows P E,et al.Very high-efficiency green organic light-emitting devices based on electrophosphorescence[J].Appl.Phys.Lett.,1999,75(1):4-6.
Adachi C,Baldo M A,Thompson M E,et al.Nearly 100% internal phosphorescence efficiency in an organic light emitting device[J].J.Appl.Phys.,2001,90(10):5048-5055.
Xu M L,Li W L,Li T L,et al.A new iridium(Ⅲ) complex and its application in organic electrophosphorescent device[J].Chin.J.Lumin.(发光学报),2005,26(5):690-692 (in Chinese).
Xu M L,Li M T,Hong Z R,et al.Highly efficient red electrophosphorescent device based on an new iridium complex with trifluoromethyl-substituted 2-benzo[b] thiophen-2-yl-pyridine ligand[J].Opt.Mater.,2006,28(8-9):1025-1028.
Lamansky S,Djurovich P,Murphy D,et al.Highly phosphorescent bis-cyclometalated iridium complexes:synthesis,photo-physical characterization,and use in organic light emitting diodes[J].J.Am.Chem.Soc.,2001,123(18):4304-4312.
High efficiency Green Organic Light-emitting Diode Without Roll-off Under High Current Density
Red Polymer Electrophosphorescent Devices Based on Iridium Complex with Reduced Self-quenching Effect
Performance Enhancement by Modification of Cathode with a Thin LiF Layer in OELDs
A New Iridium(Ⅲ) Complex and Its Application in Organic Electrophosphorescent Device
Related Author
Wang Ning
QI Jin-gang
HE Xiao-guang
TIAN Miao-miao
XU Mao-liang
HONG Zi-ruo
LI Wen-lian
LI Ming-tao
Related Institution
Physics College, Changchun Normal University
Luminous Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University
Xi'an Modern Chemistry Research Institute
Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences
Department of Applied Physics Hunan University Changsha China