Red Phosphorescent Bis‐Cyclometalated Iridium Complexes with Fluorine‐, Phenyl‐, and Fluorophenyl‐Substituted 2‐Arylquinoline Ligands |
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| Authors: | Jwajin Kim Dr Kum Hee Lee Dr Seok Jae Lee Dr Ho Won Lee Prof Young Kwan Kim Prof Young Sik Kim Prof Seung Soo Yoon |
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| Institution: | 1. Department of Chemistry, Sungkyunkwan University, Gyeonggi-do, Korea;2. Department of Information Display, Hongik University, Seoul, Korea;3. (+82)?2‐3141‐8928;4. (+82)?2‐3142‐0335;5. +(82)?031‐290‐7075 |
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| Abstract: | Red phosphorescent iridium(III) complexes based on fluorine‐, phenyl‐, and fluorophenyl‐substituted 2‐arylquinoline ligands were designed and synthesized. To investigate their electrophosphorescent properties, devices were fabricated with the following structure: indium tin oxide (ITO)/4,4′,4′′‐tris2‐naphthyl(phenyl)amino]triphenylamine (2‐TNATA)/4,4′‐bisN‐(1‐naphthyl)‐N‐phenylamino]biphenyl (NPB)/4,4′‐bis(N‐carbazolyl)‐1,1′‐biphenyl (CBP): 8 % iridium (III) complexes/bathocuproine (BCP)/tris(8‐hydroxyquinolinato)aluminum (Alq3)/8‐hydroxyquinoline lithium (Liq)/Al. All devices, which use these materials showed efficient red emissions. In particular, a device exhibited a saturated red emission with a maximum luminance, external quantum efficiency, and luminous efficiency of 14200 cd m?2, 8.44 %, and 6.58 cd A?1 at 20 mA cm?2, respectively. The CIE (x, y) coordinates of this device are (0.67, 0.33) at 12.0 V. |
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| Keywords: | 2-arylquinoline ligands iridium OLEDs phosphorescence red electroluminescence |
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