Electronic structure and electrical conduction by polaron hopping mechanism in A2LuTaO6 (A= Ba, Sr, Ca) double perovskite oxides

Time–temperature superposition in the grain and grain boundary response regime of A2HoRuO6(A = Ba, Sr, Ca) double perovskite ceramics: a conductivity spectroscopic analysis

“…11(a)-(c) display the spectroscopic plots for the imaginary component of electric modulus, Mʺ, at selected temperatures for BHR, SHR and CHR respectively. BHR displays a single relaxation peak in the entire frequency domain whereas both SHR and CHR have two relaxation peaks, one at low frequency due to grain boundary response and the other at high frequency due to the grain response [65]. The Mʺ peaks are much broader than an ideal Debye peak showing that the relaxation behaviour is non-ideal and the relaxation times are distributed.…”

Single phase multi color emitting Ca2LuTaO6: Dy3+/Eu3+ double perovskite oxide phosphors

“…Phosphors with double perovskite structure such as Sr 2 CaMoO 6 , BaLaMgNbO 6 , Sr 2 LaSbO 6 , LiLaMgWO 6 , and Sr 2 MgTeO 6 emerging a new promising candidate for the highly efficient narrow band line emission of these trivalent activators under the broad range of photoluminescence excitation, UV – blue light 42‐46 . Although phosphors with double perovskite structure proved themselves is excellent host materials for the highly efficient multicolor narrow band line emission attributed to the characteristics emission of these trivalent rare‐earth ions due to versatile crystal structure having high chemical and thermal stability with superior optical properties 2,24,47,48 . However, the concept behind the highly insensitive multicolor line emission of these rare‐earth‐doped ions in the double perovskite is still under investigation.…”

Highly conductive double perovskite oxides A2LuTaO6 (A = Ba, Sr, Ca) as promising photoanode material for dye sensitized solar cells

“…In this work, we have introduced DPOs A2LuTaO6 (A = Ba, Sr, Ca) as the promising photoanodes for DSSC. Density functional theory (DFT) calculations show that Ba2LuTaO6 (BLT), Sr2LuTaO6 (SLT) and Ca2LuTaO6 (CLT) are wide band gap semiconductors with theoretical band gap of 2.8, 3.47 and 3.91 eV, respectively [9]. BLT and SLT have also shown their potential in photocatalytic waste water treatment and good photo sensitivity under white light illumination [10].…”