Proceedings of Online Meetup: Origins of Electronic Defects in Halide Perovskites (EDHP)
Publication date: 1st April 2020
The easy bandgap tunability of mixed-halide perovskite makes them promising candidate for LEDs and tandem solar cells. However, illuminating the material results in formation of halide-rich phases. Similarly, pure halide compositions suffer of halide migration reducing the long-term stability. Activation energies reported for the two processes are comparable suggesting vacancy-mediated anion transport in both cases. We investigate the kinetics of phase segregation in MAPb(BrxI1-x)3 (xbr-= 0.5) by transient absorption spectroscopy under hydrostatic pressure using an additional light beam to induce the segregation. We observe a slower build-up of halide-rich phase when the pressure increases from ambient pressure to 0.3 GPa where halide segregation is slow enough to be almost suppressed. We interpret this as a change in the activation energy as the logarithm of the segregation rate follows the same trend as the theoretical activation energy under pressure. This would suggest that a similar approach may be used to suppress halide migration in pure systems.
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.