Insight into the effect of rare earth [formula omitted] elements on the physical properties of Pb-Based Perovskite Oxides ([formula omitted]).

The electronic, elastic, structural, thermoelectric and optical parameters of Pb-based cubic perovskites P b R E O 3 (R E = C e , N d , G d) were calculated using the WIEN2k Package. The mechanical optimization and structural stabilities were evaluated. The found results are in full agreement with the experimental ones. The obtained elastic results show that these perovskites behave as stable ductile materials, and their higher Y value gives them rigid structures. The P b C e O 3 presents n-type semiconductor while P b R E O 3 (R E = N d , G d) exhibit p-type semi-conductors with gap energies of 2. 60 eV , 1. 02 eV and 1. 55 eV , respectively. The optical properties show that P b R E O 3 (R E = C e , N d , G d) have significant absorption in the visible light region with low reflectivity. The thermoelectric properties present a desired electrical performance at room temperature for all materials. For these generation of materials, the effect of RE on Pb-based cubic perovskite oxides can be exploited in manufacturing of thermoelectric, mechanic and optoelectronic devices. • Physical properties of PbCeO3, PbNdO3 and PbGdO3 were studied. • Structural and elastic properties present a stable behavior of the studied compounds. • The electronic properties indicate the semiconductor behavior of all studied. • Optical properties presents an important absorption coefficient in the visible region. • Thermoelectric properties show the charge carriers responsible of the conduction. [ABSTRACT FROM AUTHOR]