Structural and impedance analysis of Co-doped SrTiO3 perovskite

Multisite occupation of divalent dopants in barium and strontium titanates

“…( 13) needs to be used to determine how the occupation site affects the stability and to establish the preferential occupation of the dopant. The tolerance factor can be redefined as [36]: 15) for the A-site and Ti-site mechanism, where R M is the ionic radius of the M 2+ dopant taken from the VI coordination number [34,36]. For the mixed incorporation mechanism, the tolerance factor is defined as follows:…”

“…Both compounds have been employed in photocatalytic applications related to solar cells for producing renewable green energy due to their small band gap energies at room temperature [11]. In order to improve the performance of the compounds used in this field, foreign cations have often been used as dopants to modify the structural and electronic properties, and by shifting the absorption of ultraviolet light to the visible range [12][13][14][15].…”

Structure and transport properties of triple-conducting BaxSr1−xTi1−yFeyO3−δoxides

“…Y, La, Pr) [9][10][11] and/or Ti-(e.g. Nb) 12,13 sublattices, while the addition of acceptor dopants (Fe, Cr, Sc, Al, Co, Zn) [14][15][16][17][18][19][20][21] leads to the formation of oxygen vacancies or electron holes.…”

Structural Properties and Water Uptake of SrTi1−xFexO3−x/2−δ

“…Y 3+ [6], La 3+ [7] or Pr n+ [8] on the Sr 2+ or Nb 5+ on theTi 4+ [9,10] site, is compensated by the formation of cation vacancies and electrons in the conduction band [11]. On the other hand, the presence of acceptor dopants (Fe n+ [12][13][14], Cr 3+ [15], Sc 3+ [16], Al 3+ [17], Co n+ [18]) leads to forming either ionized oxygen vacancies or electron holes. Therefore, a proper selection of the doping strategy enables tuning of the concentration of ionic and electronic between 1200 and 1400 • C for 24 h, depending on the composition.…”