30 April 2012 Evaluation of amplified spontaneous emission from photopumped thiophene/phenylene co-oligomers in polycrystalline states
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Abstract
We examined the thermal crystallization of deposited films made of 2,5-bis(4-biphenylyl)thiophene (BP1T) and 1,4-bis(5-phenylthiophen-2-yl)benzene (AC5), which are thiophene/phenylene co-oligomers (TPCOs). The deposited films of both BP1T and AC5 showed a microcrystalline phase, and initial microcrystals got larger 10 - 100 times with thermal treatment. Furthermore, we measured the optical properties of microcrystals of BP1T and AC5. At the energy density below the spontaneous amplified emission threshold, it was found that there was a big fluorescent difference between femtosecond laser irradiation and continuous lamp irradiation.
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Hiroyuki Mochizuki, Yoshizo Kawaguchi, Fumio Sasaki, Shu Hotta, "Evaluation of amplified spontaneous emission from photopumped thiophene/phenylene co-oligomers in polycrystalline states", Proc. SPIE 8435, Organic Photonics V, 84351H (30 April 2012); doi: 10.1117/12.921973; https://doi.org/10.1117/12.921973
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