<p>This study explores the fabrication and thermoelectric properties of Sb₂Te₃ and Bi₂Te₃ thin films prepared using physical vapor deposition (PVD) with synthesized nano powders as source materials. Nano Sb₂Te₃ and Bi₂Te₃ powders were synthesized via a hydrothermal method, yielding high-purity nanostructures with hexagonal crystal structures, as confirmed by X-ray diffraction (XRD). The nano powders were deposited onto substrates to create thin films approximately 100 nm thick, with scanning electron microscopy (SEM) confirming uniform morphology. Thermoelectric characterization revealed a Seebeck coefficient of 192 μV/K for Sb₂Te₃ at room temperature, which increased to 380 μV/K after annealing. Bi₂Te₃ exhibited an n-type Seebeck coefficient of −&#xa0;45 μV/K, which improved to −&#xa0;170 μV/K with annealing. Resistivity measurements demonstrated distinct electrical transport mechanisms for both materials, with Sb₂Te₃ exhibiting metallic-like behavior at lower temperatures and Bi₂Te₃ showing thermally activated conduction. The complementary thermoelectric properties of Sb₂Te₃ and Bi₂Te₃ highlight their potential for use in high-efficiency p–n junction thermoelectric devices.</p>