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Quasi-2D (two-dimensional) hybrid perovskites are emerging as a new class of materials with high photoluminescence yield and improved stability compared to their three-dimensional (3D) counterparts. Nevertheless, despite their outstanding emission properties, few studies have been reported on amplified spontaneous emission (ASE) and a thorough understanding of the photophysics of these layered materials is still lacking. In this work, we investigate the ASE properties of multilayered quasi-2D BA3MA3Pb5Br16 films through the dependence of the photoluminescence on temperature and provide a novel insight into the emission processes of quasi-2D lead bromide perovskites. We demonstrate that the PL and ASE properties are strongly affected by the presence, above 190 K, of a minor fraction of the high temperature (HT) phase. This phase dominates the PL spectra at low excitation density and strongly …
Royal Society of Chemistry
Publication date: 
1 Jan 2021

Maria Luisa De Giorgi, Arianna Cretì, Maria-Grazia La-Placa, Pablo P Boix, Henk J Bolink, Mauro Lomascolo, Marco Anni

Biblio References: 
Volume: 13 Issue: 19 Pages: 8893-8900