Publication date: 28th August 2024
A novel approaches to studying hybrid perovskites optical properties has been proposed to complement commonly used ones. In the study a piezo-modulation spectroscopy was applied to investigate the optical transitions in well-known perovskite films. A series of methylammonium and formamidinium perovskite layers were prepared using spin-coating and drop-casting directly onto a piezoceramic substrate. The piezoreflectance signal, corresponding to optical transition, was successfully observed at room temperature. Subsequently, to explore the phase transitions in MAPbI3 in detail, measurements were conducted over a wide temperature range for layers prepared by both drop-casting and spin-coating techniques. Complementary photoluminescence measurements were also conducted as a reference method. The energies of optical transitions obtained from absorption-like (i.e., piezoreflectance) and emission-like (i.e., photoluminescence) experiments are in a good agreement. The applied piezoreflectance method demonstrated greater sensitivity to phase transitions in the standard MAPbI3 perovskite compared to photoluminescence due to the intrinsic sensitivity of this method to structural phase transitions. A comparative analysis of these two measurement techniques revealed that utilizing piezo-modulation spectroscopy for exploring halide perovskite semiconductor properties provides valuable insights into the optical properties of MAPbI3.
This work was supported by the National Science Centre (NCN) Poland PRELUDIUM BIS 4 no. 2022/47/O/ST3/01965.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.