NDLI: Luminescent zinc(ii) and copper(i) complexes for high-performance solution-processed monochromic and white organic light-emitting devices

Content Provider	Royal Society of Chemistry (RSC)
Author	Che, Chi-Ming Chang, Xiaoyong Kwok, Wai-Ming So, Gary Kwok-Ming To, Wai-Pong Guan, Xiangguo Ma, Chensheng Cheng, Gang Chen, Yong Kwok, Chi-Chung
Copyright Year	2015
Abstract	The synthesis and spectroscopic properties of luminescent tetranuclear zinc(II) complexes of substituted 7-azaindoles and a series of luminescent copper(I) complexes containing 7,8-bis(diphenylphosphino)-7,8-dicarba-nido-undecaborate ligand are described. These complexes are stable towards air and moisture. Thin film samples of the luminescent copper(I) complexes in 2,6-dicarbazolo-1,5-pyridine and zinc(II) complexes in poly(methyl methacrylate) showed emission quantum yields of up to 0.60 (for Cu-3) and 0.96 (for Zn-1), respectively. Their photophysical properties were examined by ultrafast time-resolved emission spectroscopy, temperature dependent emission lifetime measurements and density functional theory calculations. Monochromic blue and orange solution-processed OLEDs with these Zn(II) and Cu(I) complexes as light-emitting dopants have been fabricated, respectively. Maximum external quantum efficiency (EQE) of 5.55% and Commission Internationale de l'Eclairage (CIE) coordinates of (0.16, 0.19) were accomplished with the optimized Zn-1-OLED while these values were, respectively 15.64% and (0.48, 0.51) for the optimized Cu-3-OLED. Solution-processed white OLEDs having maximum EQE of 6.88%, CIE coordinates of (0.42, 0.44), and colour rendering index of 81 were fabricated by using these luminescent Zn(II) and Cu(I) complexes as blue and orange light-emitting dopant materials, respectively.
Starting Page	4623
Ending Page	4635
Page Count	13
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	6
Issue Number	8
Journal	Chemical Science
DOI	10.1039/c4sc03161j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Spectroscopy International Commission on Illumination Ligand Poly(methyl methacrylate) Zinc Quantum tunnelling Thin film Pyridine EQE Dopant Density functional theory The Internationale Copper CIE Commission Internationale
Content Type	Text
Resource Type	Article
Subject	Chemistry

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