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

Niu, Qiaoli and Zhang, Qi and Xu, Weidong and Jiang, Yi and Xia, Ruidong and Bradley, Donal D. C. and 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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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: 07 Nov 2017 12:49

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