Improvement of the quasi-continuous-wave lasing properties in organic semiconductor lasers using oxygen as triplet quencher
Improvement of the quasi-continuous-wave lasing properties in organic semiconductor lasers using oxygen as triplet quencher
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DOI：
10.1063/1.4952970
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发表时间：
2016-05
影响因子：
4
通讯作者：
Atula S. D. Sandanayaka;Li Zhao;Delphine Pitrat;J. Mulatier;T. Matsushima;C. Andraud;Ju‐Hyung Kim;J. Ribierre;C. Adachi
中科院分区：
文献类型：
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作者：
Atula S. D. Sandanayaka;Li Zhao;Delphine Pitrat;J. Mulatier;T. Matsushima;C. Andraud;Ju‐Hyung Kim;J. Ribierre;C. Adachi
我们展示了在无溶剂液态有机半导体分布反馈激光器中的准连续波激光发射，该激光器基于一种混合物，其中包含掺杂有蓝色发光七芴衍生物的液态9 -（2 - 乙基己基）咔唑主体。为了研究诸如分子氧之类的三线态猝灭剂对有机半导体激光器准连续波激光特性的作用，液态增益介质分别用氧气或氮气鼓泡。充氧的激光器件展现出2 μJ cm⁻²的低阈值，该阈值低于充氮器件中所测的值，并且在0.01到4 MHz之间的范围内与重复频率无关。
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 μJ 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.