Synthesis and Characterization of New Phosphorescent Heteroleptic Iridium (III) Complex by Using Tetrazole as an Ancillary Ligand for Organic Light-Emitting Diodes

Autor:	Yeong-Soon Gal, Woosum Cho, Sung-Ho Jin, Thota Giridhar, Jae-Wook Lee
Rok vydání:	2015
Předmět:	Thermal decomposition Inorganic chemistry chemistry.chemical_element General Chemistry Electroluminescence Condensed Matter Physics chemistry.chemical_compound chemistry OLED General Materials Science Quantum efficiency Tetrazole Iridium Phosphorescence Solution process
Zdroj:	Molecular Crystals and Liquid Crystals. 621:17-25
ISSN:	1563-5287 1542-1406
DOI:	10.1080/15421406.2015.1095788
Popis:	The yellow emitting tetrazole based heteroleptic iridium(III) complex, bis(diphenylquinoline)iridium(pyridyltetrazole) [(DPQ)2Ir(PyTz)], was synthesized and conformed by 1H-,13C NMR spectral techniques. The purity was also confirmed by HPLC. The thermal, electrochemical, photophysical and electroluminescent properties were intrinsically investigated. The Ir(III) complex is thermally more stable having thermal decomposition temperature (Td, 5% weight loss) more than 350°C and it shows very high glass transition temperature Tg-233°C. We have followed the easy and cost effective solution process for (DPQ)2Ir(PyTz) device fabrication and achieved better performance yellow phosphorescent organic light-emitting diodes (PhOLEDs), maximum external quantum efficiency (EQE) of 5.68%, luminance efficiency 12.63 cd/A, and CIE coordinate of (0.56, 0.43).
Databáze:	OpenAIRE
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