Proceedings of nanoGe Fall Meeting19 (NFM19)
DOI: https://doi.org/10.29363/nanoge.nfm.2019.157
Publication date: 18th July 2019
It is thought that growing large, oriented grains of perovskite can lead to more efficient devices. We compare two model systems, randomly oriented, small grain MAPbI3 films fabricated via antisolvent dripping (AS) and MAPbI3 films fabricated via Flash Infrared Annealing (FIRA) consisting of highly oriented, large grains. We measure the grain size, crystal structure and grain orientation using Electron Back-Scattered Diffraction (EBSD) and compare these to the optoelectronic properties as characterized by local photoluminescence and time-resolved microwave conductivity measurements. For the perovskites grown with FIRA, we find a spherulitic growth yielding large (tens of µm), highly oriented grains along the (112) and (200) planes in contrast to randomly oriented, smaller (400 nm) grains in the AS films. We observe a local enhancement and shift of the photoluminescence emission at different regions of the FIRA clusters, but these can be fully explained with variations in thickness, light-outcoupling, and self-absorption. We observe no effect of crystal orientation. Additionally, despite a substantial difference in grain size, we find that grain size does not play a major role in charge carrier mobilities and lifetime for the FIRA and AS films. These findings show that the orientation and size of crystalline domains in perovskite films are not necessarily related to their optoelectronic quality.
This work is part of the research program of the Netherlands Organization for Scientific Research (NWO).
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.