DOI: https://doi.org/10.29363/nanoge.almips.2021.012
Publication date: 23rd September 2021
Cesium Lead Iodide perovskite (CsPbI3) is the most suitable fully inorganic perovskite for optoelectronic applications due to its proper band gap around 1.77 eV. However, it only concerns for the “black” optically active phase (α) which is only stable at temperatures above 310ºC with a subsequent degradation to the β and γ active phases and eventually to the “yellow” non-optically active orthorhombic phase (δ) which is the most stable phase at room temperature.
Here, we propose a scaffold assisted synthesis of CsPbI3 nanocrystals with “black” optically active phase. The synthesis does not require ligands nor additives. Simply using a porous network that consists in a stack of SiO2 nanospheres, we create a mesoporous scaffold with a 50% porosity which allows a further infiltration of a CsPbI3 precursor solution. After a mild thermal treatment, we obtain nanocrystals thanks to the strain conferred by the matrix during crystal growth. Nanocrystals optical properties can be tuned by means of quantum confinement effects either as a consequence of a variation in the precursor concentration solution but also by means of Iodine/Lead ratio alteration. Furthermore, the careful filling of the matrix enables an efficient charge transport between q-dots by percolation mechanism. This allow us to fabricate solar cells or deep-red emission devices
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.