Photoluminescence Properties of CsPbCl3 and CsPbBr3 Nanocrystals synthesized by LARP Method with Various Ligands and Anti-solvents Valdi Rizki Yandri1,2, Priastuti Wulandari1, and Rachmat Hidayat*1
1 Physics of Magnetism and Photonics Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132. Indonesia
2 Power Electronics Laboratory, Polytechnic State of Padang, Limau Manis Padang 25164. Indonesia
*
Abstract
Cesium lead halide (CsPbX3- X=Cl, Br, I) are all-inorganic perovskite materials that can be synthesized by some methods such as hot injection, solvent-induced reprecipitation, microwave assisted, ligand assisted reprecipitation (LARP) and mechanochemical method. In this research, we report synthesis of CsPbCl3 and CsPbBr3 nanocrystals (NC) that was synthesized from CsCl and PbCl2 by the LARP method at room temperature in dimethyl sulfoxide (DMSO) solvent. CsPbBr3 NC was also synthesized by a similar method from CsBr and PbBr2. CsPbCl3 and CsPbBr3 were synthesized by using different ligand (i.e. linoleic acid (LA) and oleic acid (OA)). Besides that, antisolvent was varied to two anti-solvents, i.e. chloroform, toluene, and tetrahydrofuran (THF). The XRD patterns of those nanoparticles indicates that their crystal structures are cubic with space group Pm-3m (221). Lattice constants are 5.61 A for CsPbCl3 and 5.83 A for CsPbBr3. The PL peak of CsPbCl3 NC emerges at around 435 - 437 nm, whereas for CsPbBr3 NC at around 516 - 526 nm.
