Solution-processed anthracene-based molecular glasses as stable blue-light-emission laser gain media

Article

Niu, Q., Zhang, Q., Xu, W., Jiang, Y., Xia, R., Bradley, D., Li, D. and Wen, S. 2015. Solution-processed anthracene-based molecular glasses as stable blue-light-emission laser gain media. Organic Electronics. 18, pp. 95-100. https://doi.org/10.1016/j.orgel.2015.01.012
TypeArticle
TitleSolution-processed anthracene-based molecular glasses as stable blue-light-emission laser gain media
AuthorsNiu, Q., Zhang, Q., Xu, W., Jiang, Y., Xia, R., Bradley, D., Li, D. and Wen, S.
Abstract

Two asymmetric 9,10-disubstituted anthracene-based, solution-processable, molecular glasses were studied in detail as thin-film laser gain media and were found to demonstrate very low amplified spontaneous emission (ASE) thresholds (0.75–1.1 μJ/pulse). Distributed feedback (DFB) lasers fabricated with these materials by spin coating on top of pre-etched silica one-dimensional (1-D) gratings exhibited a minimum laser threshold of 5.7 nJ per pulse (17.7 μJ cm−2) and maximum slope efficiency of 3.6%. The thermal stability of the gain was also investigated, with ASE observed for thermal annealing at temperatures up to 300 °C without any significant increase in threshold. The high thermal stability and low laser threshold make these materials very promising gain media. Comparison of the two glasses demonstrated that whilst fluorine-substitution significantly lowers the HOMO and LUMO levels it does not dramatically affect the gain. Our results suggest a potential approach for materials synthesis to address the challenge of electrically pumping an organic laser.

KeywordsOptical gain properties; Solution-processed organic semiconductor lasers; 9,10-disubstituted anthracenes; Fluorine atom substitution; Thermal stability
Research GroupBiomarkers for Cancer group
PublisherElsevier
JournalOrganic Electronics
ISSN1566-1199
Publication dates
Online19 Jan 2015
Print01 Mar 2015
Publication process dates
Deposited06 Apr 2016
Accepted09 Jan 2015
Output statusPublished
Digital Object Identifier (DOI)https://doi.org/10.1016/j.orgel.2015.01.012
LanguageEnglish
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