Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Efficient nondoped blue organic light-emitting diodes based on phenanthroimidazole-substituted anthracene derivatives

Language

English

Abstract

A series of new blue materials based on highly fluorescent di(aryl)anthracene and electron-transporting phenanthroimidazole functional cores: 2-(4-(anthracen-9-yl)phenyl)-1-phenyl-1H-phenanthro[9,10-d]imidazole (ACPI), 2-(4-(10-(naphthalen-1-yl)anthracen-9-yl)phenyl)-1-p-henyl-1H- phenanthro[9,10-d]imidazole (1-NaCPI), 2-(4-(10-(naphthalen-2-yl)anthracen-9-yl) phenyl)-1-phenyl-1H-phenanthro[9,10-d]imidazole (2-NaCPI) were designed and synthesized. These materials exhibit good film-forming and thermal properties as well as strong blue emission in the solid state. To explore the electroluminescence properties of these materials, three layer, two layer and single layer organic light-emitting devices were fabricated. With respect to the three layer device 4 using ACPI as the emitting layer, its maximum current efficiency reaches 4.36 cd A-1 with Commission Internationale del'Eclairage (CIE) coordinates of (0.156, 0.155). In the single layer device 10 based on ACPI, maximum current efficiency reaches 1.59 cd A-1 with Commission Internationale del'Eclairage (CIE) coordinates of (0.169, 0.177). Interestingly, both device 4 and 10 has low turn on voltage and negligible efficiency roll off at high current densities. © 2012 Elsevier B.V. All rights reserved.

Keywords

Anthracene, Blue material, Organic light-emitting devices, Phenanthroimidazole

Publication Date

2012

Source Publication Title

Organic Electronics

Volume

13

Issue

12

Start Page

3050

End Page

3059

Publisher

Elsevier

DOI

10.1016/j.orgel.2012.08.032

Link to Publisher's Edition

http://dx.doi.org/10.1016/j.orgel.2012.08.032

ISSN (print)

15661199

ISSN (electronic)

18785530

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