A highly fluorinated iridium complex as a blue-green emitting component for white electroluminescence
Articolo
Data di Pubblicazione:
2017
Citazione:
A highly fluorinated iridium complex as a blue-green emitting component for white electroluminescence / R. Ragni, V. Maiorano, M. Pugliese, A. Maggiore, E. Orselli, F. Babudri, G. Gigli, L. De Cola, G.M. Farinola. - In: SYNTHETIC METALS. - ISSN 0379-6779. - 227(2017), pp. 148-155. [10.1016/j.synthmet.2017.04.002]
Abstract:
A novel perfluorinated heteroleptic iridium complex, namely iridium(III)bis[2-(2,5,2′,3′,4′,5′,6′-heptafluoro-biphenyl-4-yl)-pyridinato-N,C2′][3-(pentafluorophenyl)-pyridin-2-yl-1,2,4-triazolate] (Ir-F19), has been synthesized and characterized both in solution and in the solid state. The compound displays blue-green photoluminescence, with emission peaks at 480 and 512 nm and 68% quantum yield, in degassed acetonitrile solution. The use of this phosphor in blue and white organic light emitting devices (WOLEDs) has been investigated. Current efficiency of 8.3 cd/A at 100 cd/m2 has been recorded for the blue emitting device whereas white electroluminescence with good color rendering index (CRI = 76) and CIE coordinates (0.43, 0.42) have been observed for a WOLED made of two stacked layers based on Ir-F19 and the commercial orange Ir(MDQ)2(acac) [bis(2-methyldibenzo[f,h]quinoxaline)(acetylacetonate)iridium(III)]. WOLED luminous efficiency of 10.5 cd/A at 100 cd/m2, almost constant (10.1 cd/A) up to 1000 cd/m2, indicates that Ir-F19 is a promising blue-green emitting component for white electroluminescence.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Fluorinated emitters; Iridium complexes; OLEDs; White electroluminescence
Elenco autori:
R. Ragni, V. Maiorano, M. Pugliese, A. Maggiore, E. Orselli, F. Babudri, G. Gigli, L. De Cola, G.M. Farinola
Link alla scheda completa: