Enhanced thermoelectricity in Bi-sprayed bismuth sulphide particles

Bismuth sulphide (Bi2S3), an n-type semiconductor that critically demonstrates the Seebeck effect with coefficients of about 300 μVK−1. However, its poor electrical conductivity makes it unsuitable for thermoelectric applications. In this study, we present a facile preparation method fabricating Bi-sprayed Bi2S3 particles alters their properties. Samples were created differing Bi concentrations into compound to test enhanced properties resulting Bi/Bi2S3 composites. The incorporation excess significantly improves compound's and optimises overall performance. composites improved from 6.5 Scm−1 (for pristine Bi2S3) 154 highest added Bi2S3). Although coefficient samples decreased incorporation, high power factor (∼390 μWm−1K−2) has been achieved optimised composition composite. Incorporation metallic led increase in thermal samples, but is not significant where performance observed. Therefore, moderate have resulted peak ZT value 0.11 at room temperature. strategy proposed here thermoelectricity shows excellent potential developing better-performing compounds elemental contents.