Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7130305 | Optics & Laser Technology | 2015 | 5 Pages |
Abstract
The amplified spontaneous emission (ASE) spectra of a Ï-conjugated polymer Poly [2-methoxy-5-(2â²-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) are studied in as-cast film, annealed film, 1Â mg/ml solution and 2.5Â mg/ml solution, respectively, using a 10Â ns pulsed laser as an excitation source. We found that for annealed film (420Â K), the ASE is hardly achieved compared to the as-cast film, which is consistent with the formation of the aggregation; whereas the film's temperature had much less effect on its ASE threshold. In solution, the ASE spectra show both 0-0 peak and 0-1 peak in 1Â mg/ml solution, but only 0-1 peak in 2.5Â mg/ml one. When the temperature of solution increases slightly from 300Â K to 330Â K, the ASE threshold increases dramatically in 1Â mg/ml solution but slightly in 2.5Â mg/ml one. Our results show the important role the morphology played in the ASE spectra in both film and solution. Therefore, controlling the interchain interaction in PCPs may be the key factor for performance of the organic lasers.
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Authors
Yuchen Wang, Xiao Yang, Ruizhi Wang, Li Li, Heng Li,