Emissive Iridium(III) Diimine Complexes Formed by Double Cyclometalation of Coordinated Triphenylphosphite
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 5075-5084 |
Journal / Publication | Inorganic Chemistry |
Volume | 50 |
Issue number | 11 |
Online published | 4 May 2011 |
Publication status | Published - 6 Jun 2011 |
Externally published | Yes |
Link(s)
Abstract
We report on the synthesis of a new series of iridium(III) complexes functionalized with various diimine chromophores, together with a facially coordinated dicyclometalated phosphite chelate and a monodentate anionic ancillary. This conceptual design presents a novel strategy in obtaining a new class of iridium(III) diimine complexes without employment of traditional nitrogen-containing polyaromatic cyclometalates. Additionally, we discuss the basic charactersistics of the ground and lower-lying excited states involved, as documented by crystal structural, photophysical studies, and density functional theory calculations. Fabrication of the green-emitting organic light-emitting diodes with one such dopant, [Ir(dbbpy)(tpit)NCS] (2b), where dbbpy and tpit represent di-tert-butyl-2,2'-bipyridine and dicyclometalated triphenylphosphite, respectively, was successfully made, attaining a peak external quantum efficiency (ηext), a luminance efficiency (ηl), and a power efficiency (ηp) of 14.1%, 46.6 cd A-1, and 39.9 lm W-1, respectively.
Citation Format(s)
Emissive Iridium(III) Diimine Complexes Formed by Double Cyclometalation of Coordinated Triphenylphosphite. / Chang, Yao-Yuan; Hung, Jui-Yi; Chi, Yun et al.
In: Inorganic Chemistry, Vol. 50, No. 11, 06.06.2011, p. 5075-5084.
In: Inorganic Chemistry, Vol. 50, No. 11, 06.06.2011, p. 5075-5084.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review