Highly efficient red electrophosphorescent devices based on an iridium complex with trifluoromethyl-substituted pyrimidine ligand

Autor:	Ching-Fong Shu, Sen Liu, Yun Chi, Julie A. Bardecker, Yu-Hua Niu, Alex K.-Y. Jen, Baoquan Chen, Jakka Kavitha, Ya-Hsien Tseng, Hin-Lap Yip, Chen-Han Chien
Rok vydání:	2004
Předmět:	Trifluoromethyl Materials science Physics and Astronomy (miscellaneous) Oxadiazole chemistry.chemical_element Triphenylamine Photochemistry chemistry.chemical_compound Polyfluorene chemistry OLED Quantum efficiency Iridium Phosphorescence
Zdroj:	Applied Physics Letters. 85:1619-1621
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.1786369
Popis:	Highly efficient red-emitting electrophosphorescent devices were fabricated by doping an iridium (Ir) complex containing trifluoromethyl (CF3)-substituted pyrimidine ligand into a conjugated bipolar polyfluorene with triphenylamine and oxadiazole as side chains. The device efficiency can be enhanced through effective exciton confinement using a layer of 1,3,5-tris(N- phenylbenzimidazol-2-yl)benzene on the cathode side and a layer of in situ polymerized tetraphenyldiamine-perfluorocyclobutane on the anode side. For a blend with 5wt% of the Ir complex, a maximum external quantum efficiency of 7.9 photon/electron % and a maximum brightness of 15800cd∕m2 are reached with Commission Internationale de L’Eclairage chromaticity coordinates of x=0.65 and y=0.34.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::13f4695822dd522c7718627d99fffa01 https://doi.org/10.1063/1.1786369 Zobrazit plný text záznamu