Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Synthesis, characterization, physical properties, and blue electroluminescent device applications of phenanthroimidazole derivatives containing anthracene or pyrene moiety

Language

English

Abstract

By introducing a highly fluorescent anthracene, 9-(naphthalen-2-yl) anthracene or pyrene unit at the N1-phenyl of 1,2-diphenyl-1H-phenanthro[9,10-d] imidazole, three novel blue-emissive materials (ANPI, 2-NaNPI and PNPI) were synthesized and characterized, of which HOMO and LUMO orbitals are specifically segregative. Their high luminescence efficiency and excellent stability render them promising materials in electroluminescent device. The undoped three layers device using PNPI exhibits a maximum current efficiency of 4.99 cd A -1 with Commission Internationale d'Eclairage (CIEx,y) color coordinates of (x = 0.15, y = 0.17). Meanwhile, the property differences between N1-substituted and C2-substituted of diphenyl-1H-phenanthro[9,10-d] imidazole derivatives were studied. The results indicate that the change of conjugated position and moiety for those blue hosts can affect the electrical field polarization of device. Specifically, all the blue host materials containing anthracene moiety show an impressive luminous current efficiency around 12 cd A-1 when doped with sky blue fluorescent material BUBD-1. © 2013 Elsevier Ltd. All rights reserved.

Keywords

Anthracene, Blue host material, High Tg, Organic light-emitting device, Phenanthro[9, 10-d]imidazole, Pyrene

Publication Date

2014

Source Publication Title

Dyes and Pigments

Volume

101

Start Page

93

End Page

102

Publisher

Elsevier

DOI

10.1016/j.dyepig.2013.08.027

Link to Publisher's Edition

http://dx.doi.org/10.1016/j.dyepig.2013.08.027

ISSN (print)

01437208

ISSN (electronic)

18733743

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