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Operational lifetime improvement of poly(9,9-dioctylfluorene) active waveguides by thermal lamination
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17.In order to minimize the influence of local thickness fluctuations, the ASE threshold has been measured in six different points on each sample, by using the average value as best estimate and the standard deviation as error bar.
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We investigate the encapsulation performances of polyethylene terephthalate-poly (ethylene vinyl acetate) laminating pouches, thermally laminated on flexible poly(9,9-dioctylfluorene)(PF8) active waveguides showing amplified spontaneous emission (ASE). We show that the lamination process does not cause significant degradation of the PF8 emission properties and preserves the ASE properties of the waveguide, with an ASE threshold increase of only 15%. A clear increase of the ASE operational lifetime up to 2.3 times is observed after lamination, together with stable ASE threshold for more than 6 months after the device realization, thus proposing thermal lamination as a straightforward technique to encapsulate organic active waveguides, preserving the possibility to realize flexible devices.
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