New 1H-pyrazolo[3,4-b]quinoxaline derivatives as sharp green-emitting dopants for highly efficient electroluminescent devices

Pengfei Wang; Zhiyuan Xie; Oiyan Wong; Chun-Sing Lee; Ningbew Wong; Liangsun Hung; Shuittong Lee

doi:10.1039/B202686D

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New 1H-pyrazolo[3,4-b]quinoxaline derivatives as sharp green-emitting dopants for highly efficient electroluminescent devices

Pengfei Wang,^a Zhiyuan Xie,^a Oiyan Wong,^a Chun-Sing Lee,^a Ningbew Wong,^a Liangsun Hung^a and Shuittong Lee*^a

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* Corresponding authors

^a Center of Super-Diamond and Advance Films (COSDAF) and Department of Physics and Materials Sciences, City University of Hong Kong, Hong Kong, SAR, China
E-mail: apannale@cityu.edu.hk
Fax: +852-27844696
Tel: +852-27889606

Abstract

Several new 1H-pyrazolo[3,4-b]quinoxaline derivatives with N,N-dialkylamino as the electron donating group were prepared; their photoluminescence in solution and electroluminescence have been investigated; they show emission at about 520–540 nm with a fluorescence quantum yield close to unity in solution; devices fabricated by using these compounds as dopants show green emission with efficiencies of 7.5–9.7 cd A⁻¹ and a narrow bandwidth of 65–70 nm peaking at 530–545 nm.

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Article information

DOI: https://doi.org/10.1039/B202686D
Article type: Communication
Submitted: 20 Mar 2002
Accepted: 13 May 2002
First published: 29 May 2002

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Chem. Commun., 2002, 1404-1405

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New 1H-pyrazolo[3,4-b]quinoxaline derivatives as sharp green-emitting dopants for highly efficient electroluminescent devices

P. Wang, Z. Xie, O. Wong, C. Lee, N. Wong, L. Hung and S. Lee, Chem. Commun., 2002, 1404 DOI: 10.1039/B202686D

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Chemical Communications

New 1H-pyrazolo[3,4-b]quinoxaline derivatives as sharp green-emitting dopants for highly efficient electroluminescent devices

Abstract

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New 1H-pyrazolo[3,4-b]quinoxaline derivatives as sharp green-emitting dopants for highly efficient electroluminescent devices

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