Photoluminescence Properties of CsPbCl3 and CsPbBr3 Nanocrystals synthesized by LARP Method with Various Ligands and Anti-solvents

Abstract Cesium lead halide (CsPbX 3 ; X= Cl, Br, I) is inorganic materials that can be used for the absorber of Perovskite solar cell and active layer of sensor. In this research, synthesis of cesium lead chloride (CsPbCl 3 ) utilizes cesium chloride (CsCl) and lead (II) chloride (PbCl 2 ) as raw materials then oleic acid and linoleic acid are used as ligands. CsCl and PbCl 2 can be utilized to synthesize CsPbCl 3 by using ligand-assisted reprecipitation (LARP) method at room temperature. Dimethyl Sulfoxide (DMSO) is used as the solvent of CsCl and PbCl 2 to form 0.1 M solution. Similar to CsPbCl 3 , synthesis of CsPbBr 3 utilizes CsBr and PbBr 2 at room temperature. Antisolvent used in this experiment are chloroform, toluene and tetrahydrofuran (THF) for colloidal solution CsPbCl 3 and CsPbBr 3 . This research will analyze the impact of different ligands and different antisolvent, so it will be obtained the most suitable ligand and antisolvent for CsPbCl 3 and CsPbBr 3 . The wavelength of photoluminescence spectra for samples of CsPbCl 3 and CsPbBr 3 colloidal solution are 434.00 nm and 512.82 nm. Based on transmission electron microscope (TEM) results, nanocrystals have been formed in samples of CsPbCl 3 and CsPbBr 3 colloidal solution. Powder samples of CsPbCl 3 and CsPbBr 3 can be obtained by heating at 190°C (the boiling point of DMSO) then CsPbCl 3 and CsPbBr 3 are identified in each powder sample by x-ray diffraction (XRD).