Chemically Prepared Cu-Rich CuSbSe₂Nanocrystals for Solar Cells and Thermoelectric Power Applications

Abstract

CuSbSe 2 ink has been prepared by low-cost solvothermal thermal technique. The powdered material is found to have polycrystalline orthorhombic crystal structure, while the films were prepared by spin-coating technique are found to have preferred orientation along (104) direction. The high-resolution transmission electron microscope shows that the prepared ink has homogenous small particles with average size of 2 nm. The composition of the material is checked with energy dispersive X-ray technique. Besides, the optical transmittance and reflectance of CuSbSe 2 films were measured by spectrophotometer on the wavelength range of 200-2500 nm. The absorption coefficient of the films is deduced and the type of transition and optical band gap value is determined. Finally, the data of Seebeck coefficient shows that the films have p-type conduction; the electrical conductivity of the films is measured in the temperature range of 293-473 K.