Synthesis and Characterization of Hybrid Perovskite Compounds of CH3NH3PbX3 (X = Cl, Br, I) as Solar Cell Sensitizer

• Main Author: Setiawati Soemodinoto, Annisa
• Format: Final Project
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/32282
• Institution: Institut Teknologi Bandung

Energy from the sun as renewable energy resource in Indonesia has not been maximized because solar cell’s price is expensive. The discovery of hybrid perovskite as sensitizer or light harvester in dye-sensitized solar cell (DSC) can make solar cell price much cheaper than conventional solar cell that use silicon. Efficiency enhancement (~18%) from hybrid perovskite solar cell makes the development of this material is promising. In this experiment, synthesis of hybrid perovskite (CH3NH3)PbX3 (X = Cl, Br, I) was carried out by two-step method, by mixing methylamine with HX solution and lead(II) acetate with HX in two separated container and then it is continued with mixing those two solutions. X-Ray Diffraction characterization shows that compound with X = Cl and Br have match with reported patterns, meanwhile X = I is not successfully prepared. We still can observed PbX2 phase as impurities. Further infrared spectroscopy characterization shows methyl and amine group at wavenumber around 2990 and 3300 cm-1. Diffuse reflectance spectroscopy (DRS) spectrum shows that both compoung have direct bandgap about 2.79 eV for X = Cl and 2.09 eV for X = Br, and indirect bandgap about 2.91 eV for X = Cl and 2.16 eV for X = Br. Photoluminescence spectrum at ?ex 375 nm shows emission for X = Br at 550 nm, while for X = Cl there is no emission observed.