Silica Addition Effect on Optical Properties of Organometal Halide Perovskite-PMMA Composite Film
Ea Cahya Septia Mahen1,2, Bebeh Wahid Nuryadin3, A H Aimon1, Suprijadi1,4 and Ferry Iskandar1,4*

U1Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung, Indonesia 40132
2Department of Physics Education, Faculty of Education and Teaching, UIN Sunan Gunung Djati Bandung, Jl. A. H. Nasution 105 Bandung Indonesia 40614,
3Department of Physics, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung, Jl. A. H. Nasution 105 Bandung Indonesia 40614
4Research Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung,
Jl. Ganesha 10 Bandung, Indonesia 40132

Abstract

The effect of silica (SiO2) addition on optical properties of organometal halide perovskite PMMA composite film was studied. The organometal halide perovskite, MAPbBr3, was synthesized using ligand assisted re-precipitation (LARP) method, and then was compose to PMMA and SiO2 directly to make composite films. The absorbances, transmittances, and photoluminescence (PL) spectrum of the samples were characterized using UV Vis and PL spectroscopy. The result shows that both samples showed a semi-transparent film with 80 % transmittance and multiple excitonic peaks on absorption spectra with different intensity. This reveals a mixture of perovskite nanostructures with different morphologies and sizes. The addition of SiO2 in the composite leads strong exciton absorption at short wavelength resulting in a blueshift in the PL spectra.

Keywords: Perovskite, PMMA, Silica

Topic: Material Science