NDLI: Pyrenoimidazole-based deep-blue-emitting materials: optical, electrochemical, and electroluminescent characteristics.

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Pyrenoimidazole-based deep-blue-emitting materials: optical, electrochemical, and electroluminescent characteristics.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kumar, Dhirendra Thomas, K. R. Justin Lin, Ching-Chiao Jou, Jwo-Huei
Description	Country affiliation: India Author Affiliation: Kumar D ( Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India.)
Abstract	A series of pyrenoimidazoles that contained various functional chromophores, such as anthracene, pyrene, triphenylamine, carbazole, and fluorene, were synthesized and characterized by optical, electrochemical, and theoretical studies. The absorption spectra of the dyes are dominated by electronic transitions that arise from the pyrenoimidazole core and the additional chromophore. All of the dyes exhibited blue-light photoluminescence with moderate-to-high quantum efficiencies. They also displayed high thermal stability and their thermal-decomposition temperatures fell within the range 462-512 °C; the highest decomposition temperature was recorded for a carbazole-containing dye. The oxidation propensity of the dyes increased on the introduction of electron-rich chromophores, such as triphenylamine or carbazole. The application of selected dyes that featured additional chromophores such as pyrene, carbazole, and triphenylamine as blue-emissive dopants into multilayered organic light-emitting diodes with a 4,4'-bis(9H-carbazol-9-yl)biphenyl (CBP) host was investigated. Devices that were based on triphenylamine- and carbazole-containing dyes exhibited deep-blue emission (CIE 0.157, 0.054 and 0.163, 0.041), whereas a device that was based on a pyrene-containing dye showed a bright-blue emission (CIE 0.156, 0.135).
File Format	HTM / HTML
ISSN	18614728
Issue Number	9
Journal	Chemistry - An Asian Journal
Volume Number	8
e-ISSN	1861471X
Language	English
Publisher	Wiley-VCH
Publisher Date	2013-09-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Chemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry

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