Phase Equilibria in Ternary System CsBr-AgBr-InBr3

Abstract

The double perovskite halides A2BIBIIIX6 provide flexibility for various formulation adjustments and are of less toxicity in comparison with well-discussed complex lead halide derivatives. Such type of structure can be formed by replacing two Pb2+ ions in the cubic lattice with a pair of non-toxic heterovalent (monovalent and trivalent) metal cations, such as silver and indium. The aim of this work is to briefly characterize the phase equilibria in the ternary system CsBr-AgBr-InBr3 and investigate the thermodynamic availability of synthesis of Cs2AgInBr6 double perovskite phase by solid-state sintering or melt crystallization. The results demonstrate the unfeasibility of the Cs2AgInBr6 phase but high stability of the corresponding binary bromides perspective for optoelectronics.

In Search of a Double Perovskite in the Phase Triangle of Bromides CsBr-CuBr-InBr3

“…It's identical to the sample synthesized by our group by the solid-phase method and reported elsewhere [41]. The Raman data for the sample (Figure 5d) also correspond well to the spectrum of the Cs3In2Br9 phase described by Zhou et al [42] and later by Kamilov et al [41]. A sample of the CsCu 2 Br 3 (point '2') binary bromide obtained at a temperature of 650 • C and an annealing time of 24 h is single-phase according to XRD data (Figure 6a).…”

“…It's identical to the sample synthesized by our group by the solid-phase method and reported elsewhere [41]. The Raman data for the sample (Figure 5d) also correspond well to the spectrum of the Cs 3 In 2 Br 9 phase described by Zhou et al [42] and later by Kamilov et al [41]. The XRD data of points '1'-'4' located on the CsCu2Br3-Cs3In2Br9 binary section contain only reflections of the CsCu2Br3 (PDF (77-1586)) and Cs3In2Br9 (Springer materials ID: sd_1712349) phases that indicates the stability of this section (Figure 7).…”

“…According to its XRD results, the sample is a single-phase and corresponds to the phase Cs 3 In 2 Br 9 (Springer materials ID: sd_1712349). It’s identical to the sample synthesized by our group by the solid-phase method and reported elsewhere [ 41 ]. The Raman data for the sample ( Figure 5 d) also correspond well to the spectrum of the Cs 3 In 2 Br 9 phase described by Zhou et al [ 42 ] and later by Kamilov et al [ 41 ].…”

“…It’s identical to the sample synthesized by our group by the solid-phase method and reported elsewhere [ 41 ]. The Raman data for the sample ( Figure 5 d) also correspond well to the spectrum of the Cs 3 In 2 Br 9 phase described by Zhou et al [ 42 ] and later by Kamilov et al [ 41 ].…”