SYNTHESIS OF CH3NH3PbBr3 PEROVSKITE NANOPARTICLES USING LIGAND-ASSISTED REPRECIPITATION (LARP) METHOD AND STUDY OF THE EFFECT OF SiO2 TO ITS PHOTOLUMINESCENCE STABILITY

• Main Author: NURAENI (NIM : 20216031), LELY
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/28574
• Institution: Institut Teknologi Bandung

To date, Indonesia is the largest energy consumer among Southeast Asia country. The effectiveness of this energy consumption requires access to affordable energy. A high dependence to the non-renewable energy such as petroleum and coal lead a high demand of the new and renewable energy that not only apply to nature, but also environmentally friendly. Technology products that are used in renewable <br /> <br /> energy, one of which is semiconductor. Organic-inorganic hybrid perovskite MAPbBr3 nanoparticles emerge as highly promising semiconductor materials for photovoltaic and optoelectronic applications such as LEDs, photodetectors, solar cells, and other luminescent devices. The optical properties of organic-inorganic hybrid perovskite can be manipulated when bulk structures change into lowerdimensional structures using the ligand-assisted reprecipitation (LARP) method with the designations to obtain desired optical properties. The addition of SiO2 was <br /> <br /> carried out to study its effect on stability materials after synthesis. The crystal structure of organic-inorganic hybrid MAPbBr3 was investigated using XRD (Xray <br /> <br /> Diffraction). The optical characteristics of absorbance were obtained from characterization using Ultraviolet-Visible Light Spectroscopy resulting in high absorbance far from the band edge, indicating the formation of QDs. The photoluminescence (PL) was characterized using a fluorescence spectrophotometer, with a wavelength range of 475-530 nm that was red-shifted along with an increase in precipitation temperature. The Transmission Electron <br /> <br /> Microscope (TEM) characterization were done and produced on average particle size of 13.5 nm. Additioning of SiO2 qualitatively could maintain the photoluminescence’s stability.