Journal
APPLIED PHYSICS LETTERS
Volume 108, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4952970
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Funding
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER) - Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- Leading Foreign Research Institute Recruitment Program through the National Research Foundation of Korea [NRF-2010-00453]
- Basic Science Research Program through the National Research Foundation of Korea [NRF-2015R1D1A1A01060089]
- Grants-in-Aid for Scientific Research [15K14149, 16H04192] Funding Source: KAKEN
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We demonstrate quasi-continuous-wave lasing in solvent-free liquid organic semiconductor distributed feedback lasers based on a blend containing a liquid 9-(2-ethylhexyl)carbazole host doped with a blue-emitting heptafluorene derivative. The liquid gain medium is bubbled with either oxygen or nitrogen in order to investigate the role of a triplet quencher such as molecular oxygen on the quasi-continuous-wave lasing properties of organic semiconductor lasers. The oxygenated laser device exhibits a low threshold of 2 mu J cm(-2), which is lower than that measured in the nitrogenated device and is independent of the repetition rate in a range between 0.01 and 4 MHz. Published by AIP Publishing.
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