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Light-emitting diodes are fabricated from regioregular and non-regioregular poly(3-hexylthiophenes). The regioregular polymer has a higher head-to-tail (HT) ratio than non-regioregular polymer. It is shown that the electroluminescent device containing high HT ratio polymer perform significantly better than polymers with a low HT ratio. Photoluminescence data of both polymers are also reported.
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Chen et al. (1996) studied this question.
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