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Poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) is a high-mobility polymer sesiconductor used for large-area electronic devices.

PBTTT-C14 is a semiconducting material which is used as a hole transporting material (HTM). It has an ordered structure and crystal orientation which result in a high performance conducting material.