High thermoelectric power factor of Sr doped Bi2Te3 thin film through energy filtering effect

Comprehensive study of nanostructured Bi2Te3 thermoelectric materials – insights from synchrotron radiation XRD, XAFS, and XRF techniques

“…As mentioned by Ashfaq et al , 64 at room temperature, the higher power factor value is a result of the lower electrical resistivity value and higher Seebeck coefficient. 64 As a result, the power factor of the Bi 2 Te 3 thin film is higher than that of the pellet. Moreover, they found that the surface morphology has also had an impact on the power factor values.…”

“…Moreover, they found that the surface morphology has also had an impact on the power factor values. 64 As seen in the FESEM images, the Bi 2 Te 3 thin film's grain size is smaller than those in the Bi 2 Te 3 powder and the smaller grains provide more grain boundaries which enhances the Seebeck coefficient value as found by Ashfaq et al 64 As a consequence, it increases the power factor value in Bi 2 Te 3 thin film.…”

Boosting Thermoelectric Performance of Bi2Te3 Material by Microstructure Engineering

“…In Figure 1a, the as-deposited Bi 2 Te 3 /Sb thin film show diffraction peaks corresponding to rhombohedral Bi 2 Te 3 (JCPDS NO. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. This indicates the formation of nano crystallites of Bi 2 Te 3 in the thin film at room temperature.…”

“…[13] Ashfaq et al demonstrated the that effectiveness of thermal evaporation as an approach for synthesizing the Sr doped Bi 2 Te 3 thin films with PF of 1561 μWm −1 K −2 at room temperature. [14] Moreover, confinement effects enhance PF significantly. In the case of Bi 38 Te 55 Se 7 and Bi 15 Sb 29 Te 56 nanowires, PFs of 2820 and 1750 μWm −1 K −2 at room temperature, respectively, were reported.…”