According to the updated recommendation for displays standard (Rec. 2020), ultrapure green emitters with a narrow emission (below 25 nm) in the 525-535 nm spectral range are desired. However, finding an emitter material that can meet such requirements, is still challenging. To this purpose, organic-inorganic halide perovskites nanocrystals have been considered as promising high-color purity light emitters at a lower cost, that overcome the issues associated with conventional emitters. Herein, to reach these standards simultaneously, we have synthesized Formamidinium lead bromide perovskite nanocrystals (NCs) at room temperature by ligand-assisted reprecipitation (LARP). The obtained FAPbBr(3) NCs coated with oleic acid and oleylamine show an average size of about 20 nm. FAPbBr(3) NCs dispersions in hexane exhibited bright photoluminescence with a high quantum yield (74%). The color coordinates on CIE 1931 are (0.2, 0.75), with a corresponding strong green emission at 533 nm. The emission is characterized by an ultranarrow full width at half-maximum (FWHM = 22 nm), and long radiative lifetimes (approximate to 82 ns). The synthesized FAPbBr(3) NCs present ideal features toward solution-processable ultrapure green emitters. Copyright (C) 2022 Elsevier Ltd. All rights reserved.
Low temperature synthesis of ultra-green luminescent colloidal FAPbBr3 perovskite nanocrystals / Nabila Jarmouni; Marco Tomaiuolo; Alessio Gabbani; Damiano Genovese; Francesco Pineider; Rajaa Bassam; Said Belaaouad; Said Benmokhtar. - In: MATERIALS TODAY: PROCEEDINGS. - ISSN 2214-7853. - ELETTRONICO. - 58:(2022), pp. 1480-1484. (Intervento presentato al convegno 3rd International Congress on Materials and Structural Stability (CMSS) tenutosi a Rabat, Marocco nel NOV 24-26, 2021) [10.1016/j.matpr.2022.02.562].
Low temperature synthesis of ultra-green luminescent colloidal FAPbBr3 perovskite nanocrystals
Damiano Genovese;
2022
Abstract
According to the updated recommendation for displays standard (Rec. 2020), ultrapure green emitters with a narrow emission (below 25 nm) in the 525-535 nm spectral range are desired. However, finding an emitter material that can meet such requirements, is still challenging. To this purpose, organic-inorganic halide perovskites nanocrystals have been considered as promising high-color purity light emitters at a lower cost, that overcome the issues associated with conventional emitters. Herein, to reach these standards simultaneously, we have synthesized Formamidinium lead bromide perovskite nanocrystals (NCs) at room temperature by ligand-assisted reprecipitation (LARP). The obtained FAPbBr(3) NCs coated with oleic acid and oleylamine show an average size of about 20 nm. FAPbBr(3) NCs dispersions in hexane exhibited bright photoluminescence with a high quantum yield (74%). The color coordinates on CIE 1931 are (0.2, 0.75), with a corresponding strong green emission at 533 nm. The emission is characterized by an ultranarrow full width at half-maximum (FWHM = 22 nm), and long radiative lifetimes (approximate to 82 ns). The synthesized FAPbBr(3) NCs present ideal features toward solution-processable ultrapure green emitters. Copyright (C) 2022 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
