Contacless passivation in MAPbBr3 single crystals
Ismael Fernandez-Guillen a, Pablo P. Boix a, Jaume Noguera-Gomez a, Pablo F. Betancour a, Rafa Abargues a, Uladzimir Chyrvony a
a Instituto Ciencia de los Materiales (ICMUV)
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
València, Spain, 2022 May 19th - 25th
Organizers: Pablo Docampo, Eva Unger and Elizabeth Gibson
Poster, Ismael Fernandez-Guillen, 166
Publication date: 20th April 2022

The unprecedented evolution of metal halide perovskite photovoltaics has been a key motivation to explore the outstanding optoelectronic properties of this family of materials. The research drive has focused mainly on compositional modifications and device structure improvements, but important factors such as the material stability are still important drawbacks for the technology. The use of monocrystalline material based on perovskite single crystals have been proposed to increase both efficiency and stability due to due the inherently low trap density defect of these materials that could represent an important leap in technology. However, the superior properties of monocrystalline perovskites are not directly translated into better device properties due to difficulties controlling the form factor and the surface defect densities. In this study we report a method to increase up to ten times the photoluminescence (PL) in methylammonium lead bromide (MAPbBr3) single crystals through suppression of non-radiative recombination. The contactless-passivation approach reported here could represent an alternate method for boosting the efficiency and stability of lead halide perovskites.

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