Probing the Stability and Band Gaps of Cs₂AgInCl₆ and Cs₂AgSbCl₆ Lead-Free Double Perovskite Nanocrystals

Abstract

Lead toxicity has sparked interest into alternative halide nanomaterials with properties similar to CsPbX 3 perovskites. A promising alternative suggested from

Recent Developments in Lead‐Free Double Perovskites: Structure, Doping, and Applications

“…The hot injection method is mostly used for the synthesis of a perovskite structure. [22b, 35] In this method, one precursor is injected into another precursor at high temperature, vacuum, and nitrogen environment as shown in Figure 6A.R ecently, Dahl et al [17] used al ow temperature and in-air synthesis of Cs 2 AgInCl 6 andC s 2 AgSbCl 6 nanocrystals as shown in Figure 6B. In this method, cesium acetate, silver acetate, and indium acetate were mixed into 4mLo fx ylene with oleic acid and oleylamine ligands.…”

“…In this method, one precursor is injected into another precursor at high temperature, vacuum, and nitrogen environment as shown in Figure A. Recently, Dahl et al . used a low temperature and in‐air synthesis of Cs 2 AgInCl 6 and Cs 2 AgSbCl 6 nanocrystals as shown in Figure B.…”

“…discussed recent theoretical and experimental research on electronic, optical, and defect properties. Numerous developments have recently happened on double perovskite structure research in terms of different synthesis methods, doping to improve stability, and tuning the emission from the visible to the infrared region . The double perovskite structure has also been applied for humidity sensors, X‐ray detectors, and photocatalysts (dye degradation, CO 2 reduction) and should be discussed comprehensively.…”

“…Xiao et al [16] discussed recent theoretical and experimental researcho ne lectronic, optical, and defectp roperties. Numerous developments have recently happened on double perovskite structure research in terms of different synthesis methods, [17] doping to improves tability, [18] and tuning the emission from Chem. Asian J.…”

Ag/In lead‐free double perovskites

“…Eventually, what a single cation cannot achieve, can be done, perhaps, by the cooperation of two: this is the idea which pushed several groups to explore the coexistence of two different B‐site cations in the same compound, thus extending the chemical template of the search from that of single perovskites to the double perovskites of the form A 2 BB'X 6 ; in fact, if B and B′ are not too different and size‐compatible with A and X, these materials can grow structurally ordered and highly symmetric, with B and B′ alternating in regular patterns; clearly, the chemical equivalence with Pb 2+ requires a B 1+ and B′ 3+ combination.…”