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

Niu, Qiaoli, Zhang, Qi, Xu, Weidong, Jiang, Yi, Xia, Ruidong, Bradley, Donal D. C., Li, Dong and Wen, Xuesong (2015) Solution-processed anthracene-based molecular glasses as stable blue-light-emission laser gain media. Organic Electronics, 18 . pp. 95-100. ISSN 1566-1199

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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.

Item Type: Article
Additional Information: Available online 19 January 2015
Keywords (uncontrolled): Optical gain properties; Solution-processed organic semiconductor lasers; 9,10-disubstituted anthracenes; Fluorine atom substitution; Thermal stability
Research Areas: A. > School of Science and Technology > Natural Sciences > Biomarkers for Cancer group
Item ID: 19119
Useful Links:
Depositing User: Dr Song Xuesong Wen
Date Deposited: 06 Apr 2016 12:24
Last Modified: 30 May 2019 18:35
URI: https://eprints.mdx.ac.uk/id/eprint/19119

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