Lead free halide double perovskite materials, A₂BB́X₆ (where A, B and B́ are cations and X is a halide anion) have achieved considerable attention in the field of optoelectronic devices due to their high thermal along with the moisture stability and less toxicity as lead halide perovskites suffer from the stability and toxicity issues which inhibit them to be commercialized. Therefore, synthesis of low cost and stable perovskite materials are the main focus of perovskite family nowadays. Herein, we have reported lead free Cs₂AgBiCl₆ and Cs₂AgBiBr₆ double perovskite microcrystals in both organic and a mixture of the aqueous-organic medium. Our studies are not only eradicating the toxicity of lead but also explored towards the stability of perovskite materials in the aqueous medium. Morphology is investigated using SEM and TEM imaging along with the enhancement in emission peak by increasing the content of water.

无铅卤化双钙钛矿材料A ₂ BB́X ₆（其中A，B和B́为阳离子，X为卤化物阴离子）由于其高的热稳定性，湿气稳定性和较低的毒性而在光电器件领域引起了广泛关注。由于卤化钙钛矿的稳定性和毒性问题使其无法商业化。因此，低成本和稳定的钙钛矿材料的合成是当今钙钛矿家族的主要关注点。在此，我们报道了无铅Cs ₂ AgBiCl ₆和Cs ₂ AgBiBr ₆在有机介质和水-有机介质的混合物中形成双钙钛矿微晶。我们的研究不仅消除了铅的毒性，而且还探索了钙钛矿材料在水性介质中的稳定性。使用SEM和TEM成像研究了形态，并通过增加水含量提高了发射峰。