Solution-processed organic light-emitting diodes based on yellow-emitting cationic iridium(III) complexes bearing cyclometalated carbene ligands. (November 2016)

• Record Type: Journal Article
• Authors: Zhang, Fuli; Si, Changfeng; Wei, Donghui; Wang, Shuangshuang; Zhang, Depan; Li, Suzhi; Li, Zhongyi; Zhang, Fuqiang; Wei, Bin; Cao, Guangxiu; Zhai, Bin
• Is Part Of: Dyes and pigments. Volume 134(2016)
• Page Start: 465
• Page End: 471
• Publication Date: 2016-11
• Subjects: Organic light-emitting diode -- Yellow light emission -- Cationic iridium complex -- Cyclometalated carbene ligand; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2016.08.005
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Two new cationic iridium complexes bearing cyclometalated carbene ligands have been prepared, and the photophysical and electrochemical properties have been investigated. In degassed acetonitrile solutions, these complexes exhibit yellow light emission with peaks at 591 and 579 nm, respectively. Both photophysical properties and quantum chemical calculations indicate that photoluminescence of these complexes are mainly from triplet charge-transfer excited states. Solution-processed organic light-emitting diodes based on these complexes exhibit yellow electroluminescences with the maximum current efficiencies of 17.42 and 6.36 cd A −1 and Commission Internationale d'Énclairage(x, y) coordinates (CIEx, y ) of (0.47, 0.51) and (0.51, 0.47), respectively. Graphical abstract: Highlights: Yellow-emitting cationic iridium complexes. N -heterocyclic carbene-based cyclometalating ligands. Solution-processed organic light-emitting diodes.