Dr. Nimai Mishra, Assistant Professor, Department of Chemistry, along with his research group comprising of his Ph.D. students Ms. V.G.Vasavi Dutt and Mr. Syed Akhil have published their recent work on “Fast, Tunable and Reversible Anion-Exchange in CsPbBr3 Perovskite Nanocrystals with Hydrohalic Acids” in the Journal “CrystEngComm”, Royal Society of Chemistry with an Impact factor 3.38.
Cesium-lead-halide perovskite nanocrystals In the research work, Dr. Mishra’s group has developed a very simple facile synthesis process of perovskite nanocrystals with very high emissive properties and colour tunability. Colloidal caesium-lead-halide perovskite nanocrystals (NCs) (CsPbX3, X = Cl, Br, I) are presently on-demand because of their excellent photoluminescence quantum yield (PLQY), wide range of band gap tunability and defect tolerance, finding its application as photodetectors, light-emitting diodes (LEDs), asing, and photovoltaics. Dr. Mishra informs, “Anion ( the halides) exchange in colloidal caesium-lead- halide perovskite nanocrystals (NCs) is a highly efficient protocol to tune their chemical composition and optoelectronic properties. In this work, we first report the use of hydrohalic acids (HX; X=Cl and Br) as a precursor for anion exchange which can be an efficient way to control the composition and optical properties of CsPbBr3 perovskite nanocrystals (NCs).” Furthermore, the team demonstrated a facile and efficient approach of anion-exchange which is implemented to tune the optical properties of CsPbX3 perovskite NCs via a simple post-synthetic modification with hydrohalic acids. Importantly, this work presents a simple, feasible, reproducible synthetic route toward control halide exchange in metal halide perovskite NCs with various optoelectronic properties.
Regarding the future scope of the research, Dr. Mishra informs, “These high-quality nanocrystals have the potential to be used as active material in LED devices, therefore our future plan is to make a prototype LED devices using our nanocrystals.”
Dr. Nimai Mishra is keen to collaborate, interested researchers may kindly contact him at nimai.m@srmap.edu.in