Proceedings of Asia-Pacific Conference on Perovskite, Organic Photovoltaics&Optoelectronics (IPEROP25)
Publication date: 17th October 2024
The light-induced segregation of iodide and bromide ions is observed in many wide bandgap, bromide-rich lead-halide perovskite materials having the general composition APb(BrxI1-x)3 with x→0.5. Solar cells with these materials are less stable and perform worse than their narrower bandgap, more iodine-rich counterparts. “Performance” is a global parameter; however, it is influenced by many factors, and additional work is needed to clarify the precise relationship between device performance and halide segregation. Here, we measure and compare current-voltage (J–V) curves and external quantum efficiencies (EQE) of several representative PIN devices, first in their initial state and again after 100 h operation under maximum power point conditions at 1 SUN equiv. The degree of halide segregation was quantified from the external quantum efficiency (EQE) data, specifically the changes in the derivative signal, d(EQE)/dE. We confirmed that systems with suppressed halide segregation had higher open circuit voltages (Voc). Device stability, on the other hand, was consistently lower for the wide bandgap devices, independent of the degree of halide segregation, because of the loss of short circuit current (Jsc) and lower fill factor (FF). We conclude that suppressing halide segregation is necessary to minimize voltage losses due to non-radiative charge carrier recombination. However, as the material properties of the bromide-rich perovskite materials pose several other unique challenges, suppressing halide segregation alone isn't sufficient to guarantee high performance and stability.
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.