DOI: https://doi.org/10.29363/nanoge.sdp.2022.005
Publication date: 13th June 2022
Quasi-2D perovskites are promising candidates for stable and efficient optoelectronic devices, such as light-emitting diodes, solar cells, and photodiodes. On top of superior environmental stability compared to their 3D counterpart, they possess versatile optoelectronic properties. In fact, by varying the number of inorganic layers sandwiched between the organic spacers (n), bandgap and exciton binding energy can be tuned. During film deposition, however, a variety of structural phases with different n-values are formed, usually making a 2D-3D gradient where lower dimensional phases are located at the bottom of the film and 3D at the top.
Chasing phase purity has been a challenging task for researchers, as both kinetics and thermodynamics play an important role in determining which phases are formed. While solvent engineering has been used to tune phase purity, no reports have investigated the effect of co-solvents on the crystallization mechanism of quasi-2D perovskites and their impact on phase distribution. To fill this gap, we first investigated the kinetics of film formation of quasi-2D perovskites in presence of co-solvents [1]. By using such a solvent engineering approach and in-situ techniques, we explained the mechanism behind 2D-3D gradient formation and how to selectively tune it.
We then employed 2D-3D graded perovskites for a variety of applications. First, to investigate the dependence of halide segregation in mixed-halide perovskites on their dimensionality. By forming such a multidimensional film, we could in fact study the photostability under illumination of both 2D, quasi-2D, and 3D perovskites. Then, to enhance the performances of perovskite photodiodes, which we found to be strongly dependent on a thermal charge generation mechanism taking place at the interface between the electron-blocking and the active layer.
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.