Efficient Red-Emitting Cyclometalated Iridium(III) Complexes Containing Lepidine-Based Ligands
| Autor: | Ya-Hui Hu, Chin-Hsiung Chien, Yuh S. Wen, Yu-Tai Tao, Pi-Tai Chou, Jiann T. Lin, K. R. Justin Thomas, Marappan Velusamy |
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| Rok vydání: | 2005 |
| Předmět: |
Molecular Structure
Ligand Molecular Conformation chemistry.chemical_element Crystallography X-Ray Iridium Ligands Photochemistry Red Color Lepidine Inorganic Chemistry chemistry.chemical_compound chemistry Energy absorption Luminescent Measurements Electrochemistry Organometallic Compounds Acetyl acetone Indicators and Reagents Singlet state Physical and Theoretical Chemistry Dichloromethane |
| Zdroj: | Inorganic Chemistry. 44:5677-5685 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/ic050385s |
| Popis: | Heteroleptic cyclometalated iridium(III) complexes featuring lepidine-based ligands and acetyl acetone auxiliary ligand are synthesized. Multiple lowest energy absorption bands are observed for these complexes indicating substantial mixing of the singlet and triplet levels. All the complexes emit orange or red color in dichloromethane solutions with lifetimes in the range 1.6-3.7 micros. The emission in the complexes probably originates from the (3)MLCT state. The complexes are applied as emitting guests in LED devices of the structure ITO/HTL(BPAPF or NPB)/6% Ir in CBP/BCP/Alq(3)/LiF/Al. They exhibit excellent device characteristics with an orange to red EL profile. |
| Databáze: | OpenAIRE |
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