A comparative study of physical and thermoelectrical characteristics of the new full‐Heusler alloys Ag₂TiGa and Ag₂VGa with ab initio calculations

Abstract

This paper will focus on the comparative study of the structural, electronic, magnetic, optical, and thermoelectric properties of the two Heusler systems Ag2TiGa and Ag2VGa in the inverse L21 Hg2CuTi structure. Using the density functional theory‐based wien2k code, which implements the computational methods used in this study, namely GGA, GGA‐mBJ, GGA + U, and GGA + SOC (spin‐orbit coupling). The band structures show that all two structures studied are metallic. The spin density of states of Ag2VGa has evident spin splitting near the Fermi level, and the total magnetic moment of the Ag2VGa structure is 2.19 μB, which indicates that Ag2VGa is magnetic. The full‐Heusler Ag2VGa material can be used as spintronic materials due to their high spin polarization (about 50%). While Ag2TiGa has low polarization so it is bad electronically, but better thermoelectrically than Ag2VGa. So, the full‐Heusler Ag2TiGa material may also be considered as a potential candidate for thermoelectric applications at room temperature. Studies of the two new Heusler alloys may provide a theoretical reference for subsequent theoretical research and experimental synthesis of Ag‐based Heusler alloys.

Advancements in P3HT:PCBM solar cells through experimental and simulated techniques

“…Simulation holds significant importance in the field of photovoltaics, serving dual purposes: firstly, for evaluating material properties [26][27][28][29][30][31][32], and secondly, for investigating the impact of various physical parameters such as temperature, pressure, and more on these properties [33,34]. In thinfilm technology, numerical tools are of paramount importance, providing invaluable insights into the performance of solar cells and aiding in the determination of optimal operating conditions customized for each specific cell (including parameters such as doping density and layer thickness).…”