Efficient Red-Emitting Cyclometalated Iridium(III) Complexes Containing Lepidine-Based Ligands

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 or...

Full description

Saved in:
Bibliographic Details
Published inInorganic chemistry Vol. 44; no. 16; pp. 5677 - 5685
Main Authors Thomas, K. R. Justin, Velusamy, Marappan, Lin, Jiann T, Chien, Chin-Hsiung, Tao, Yu-Tai, Wen, Yuh S, Hu, Ya-Hui, Chou, Pi-Tai
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 08.08.2005
Subjects
Crystallography, X-Ray
Electrochemistry
Indicators and Reagents
Iridium - chemistry
Ligands
Luminescent Measurements
Molecular Conformation
Molecular Structure
Organometallic Compounds - chemical synthesis
Online AccessGet full text

Cover

More Information
Summary: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 μs. The emission in the complexes probably originates from the 3MLCT state. The complexes are applied as emitting guests in LED devices of the structure ITO/HTL(BPAPF or NPB)/6% Ir in CBP/BCP/Alq3/LiF/Al. They exhibit excellent device characteristics with an orange to red EL profile.
Bibliography:istex:522AE2B16734FEFAEA4130E5F8BA8AFF2BA03278
ark:/67375/TPS-7ZN2TMBQ-C
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0020-1669
1520-510X
DOI:10.1021/ic050385s