Preparation of graphene sheets into one-dimensionally nanostructured bulk bismuth telluride for enhancing thermoelectric power factor

초록

Nanostructured bulk composites consisting of Bi2Te3 nanowires (NWs) with graphene particles are fabricated with different graphene content, and their thermoelectric properties were examined. As-prepared graphene materials were evenly distributed into the Bi2Te3 NW matrix, leading to the formation of the graphene/Bi2Te3 composite structures. The sintered composite with 0.5 wt% graphene content generated improved thermoelectric power factor of 688.9 μW/m K2, compared to the Bi2Te3 NW sample without grapheme, because of the enhanced Seebeck coefficient of the composite originating from the decreased carrier concentration. Our synthesized graphene/Bi2Te3 NW hybrid composites are promising route to achieve high performance of thermoelectric materials.

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