DOI: https://doi.org/10.29363/nanoge.incnc.2021.035
Publication date: 8th June 2021
Metal halide perovskites with low content of Pb have been synthesized with the purpose to make available the commercialization of less toxic and highly efficient devices. However, these materials do not preserve the intrinsic features of their Pb-based counterparts, giving a dilemma about the convenience of Pb substitution.[1] Here, we analyze the impact of Sr as potential dopant on the photophysical and structural properties of FAPbI3 quantum dots (QDs). The replacement of Pb by 7 at. % Sr facilitates the preparation of FAPb1-xSrxI3 QDs with 100% photoluminescence quantum yield, long-term stability for 8 months under relative humidity of 40-50%, and T80 = 6.5 months. This value is one of the highest values reported for halide QDs under air ambient. This material also depicts photobrightening under UV irradiation for 12 h, recovering the 100% PLQY 15 days after synthesis. The suppression of Schottky defects (Pb- and I-vacancies) by the presence of Sr restrains the non-radiative channels for electron relaxation.[2] Nevertheless, the increase of the Sr fraction during the QDs growth induces the emergence of 2D nanoplatelets/3D nanocubes mixture, caused by a high Pb deficiency during QDs synthesis. This work provides a novel insight about how the adequate/poor Pb substitution dictates the photophysical properties of QDs potentially applicable in optoelectronics.
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.