Synthesis and photophysical characterization of orange-emitting iridium(III) complexes containing benzothiazole ligand

► Two novel Ir(III) complex based on bt derivatives were synthesized and characterized. ► Two complexes emit intensely orange phosphorescence. ► The devices using two complex as doped emitter exhibited excellent performances. Two novel iridium(III) (Ir(III)) complexes (dmabt)2Ir(acac) and (dpabt)2Ir...

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Published inSynthetic metals Vol. 162; no. 5-6; pp. 497 - 502
Main Authors Xiao, Guoyong, Li, Xiao, Chi, Haijun, Lu, Yunhua, Dong, Yan, Hu, Zhizhi, Yu, Jianglong, Kimura, Masaru
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.04.2012
Elsevier
Subjects
Applied sciences
Benzothiazole
Electronics
Exact sciences and technology
Iridium complex
OLEDs
Optoelectronic devices
Phosphorescence
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Iridium complex
Phosphorescence
OLEDs
Benzothiazole
Performance evaluation
NMR spectrometry
Luminance
Orange light
Optoelectronic device
Organic light emitting diodes
Chromaticity
Mass spectrometry
Organic electronics
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Summary:► Two novel Ir(III) complex based on bt derivatives were synthesized and characterized. ► Two complexes emit intensely orange phosphorescence. ► The devices using two complex as doped emitter exhibited excellent performances. Two novel iridium(III) (Ir(III)) complexes (dmabt)2Ir(acac) and (dpabt)2Ir(acac)(dmabt, 4-N,N-dimethylbenzenamineyl-2-benzo[d]thiazole; dpabt, 4-N,N-diphenylbenzenamineyl-2-benzo[d]thiazole; acac, acetylacetone) were synthesized and structurally characterized by NMR and mass spectrometry. The organic light-emitting diodes based on these complexes with the structure of ITO/m-MTDATA (10nm)/NPB (20nm)/CBP: Ir-complex (X%, 30nm)/BCP (10nm)/Alq3 (30nm)/LiF (1nm)/Al (100nm) were fabricated. The device based on (dmabt)2Ir(acac) exhibited a maximum efficiency of 19.5cd/A, a luminance of 15802cd/cm2; and the device based on (dpabt)2Ir(acac) showed a maximum efficiency of 14.8cd/A, a luminance of 11334cd/cm2. Both devices displayed orange emissions and the corresponding Commission International de L’Eclairage (CIE) coordinates (1931) were (0.517, 0.481) and (0.557, 0.443), respectively.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2012.01.014