Research on power factor of BNNT/Bi2Te3 and BCNNT/Bi2Te3 nanocomposite films

Thermoelectric (TE) material nanocomposite film is widely used in the design of many kinds of wearable flexible device and portable sensors. Herein, BNNT/Bi 2 Te 3 and BCNNT/Bi 2 Te 3 TE nanocomposite films were successfully fabricated by a cost-effective hot pressing and millipore membrane filter (HPMMF) method. Their thermoelectric performance was systematically investigated at room temperature, the highest power factor of the TE nanocomposite film was 1843.2 nW/mK 2 when the film contained 0.006 wt.% BCNNT. The Seebeck coefficient of the thermoelectric nanocomposite film will reach up 205 μV/K. The power factor of BCNNT/Bi 2 Te 3 TE nanocomposite film is 17.2 times higher than that of BNNT/Bi 2 Te 3 nanocomposite film and 14 times higher than that of Bi 2 Te 3 film. It is promising to be used in many situations such as flexible wearable device and solar cell thermoelectric power generation. Graphical abstract