Next Article in Journal
Mechanisms of Sweep on the Performance of Transonic Centrifugal Compressor Impellers
Next Article in Special Issue
Synthesis and Electroluminescence Properties of 3-(Trifluoromethyl)phenyl-Substituted 9,10-Diarylanthracene Derivatives for Blue Organic Light-Emitting Diodes
Previous Article in Journal
Portfolio Implementation Risk Management Using Evolutionary Multiobjective Optimization
Previous Article in Special Issue
Enhanced Emission by Accumulated Charges at Organic/Metal Interfaces Generated during the Reverse Bias of Organic Light Emitting Diodes
Article Menu
Issue 10 (October) cover image

Export Article

Open AccessArticle
Appl. Sci. 2017, 7(10), 1078; doi:10.3390/app7101078

New Class of Wide Energy Gap Benzotriimidazole Optical Materials

1
U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, MD 20783-1138, USA
2
Nalco Ecolab, 1601 West Diehl, Naperville, IL 60563-1198, USA
*
Author to whom correspondence should be addressed.
Received: 28 September 2017 / Revised: 11 October 2017 / Accepted: 16 October 2017 / Published: 18 October 2017
View Full-Text   |   Download PDF [1069 KB, uploaded 18 October 2017]   |  

Abstract

A new class of wide energy gap benzotriimidazole materials have been synthesized by a two-step condensation reaction. All of the benzotriimidazole compounds have π-π* absorption bands in the range of 250–400 nm. The photoluminescence (PL) quantum efficiency of each benzotriimidazole depends strongly on the presence of electron withdrawing groups. PL quantum efficiencies of benzotriimidazoles without electron withdrawing groups were less than desirable (40–43%), while molecules with electron withdrawing groups displayed much stronger PL with efficiencies in the range of 73–75%. The electron withdrawing groups shift the emission to a longer wavelength, towards a more “true blue” color. This new class of benzotriimidazole optical materials could be used as electron-injecting and electron-transporting blue luminescence materials for potential organic light-emitting diode (OLED) applications. View Full-Text
Keywords: light-emitting diodes; organic materials; optical properties; absorption; photoluminescence light-emitting diodes; organic materials; optical properties; absorption; photoluminescence
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Shi, J.; Chudomel, J.M.; Fu, R. New Class of Wide Energy Gap Benzotriimidazole Optical Materials. Appl. Sci. 2017, 7, 1078.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top