Colloidal Synthesis of Double Perovskite Cs₂AgInCl₆ and Mn-Doped Cs₂AgInCl₆ Nanocrystals

Summary, in English

We show here the first colloidal synthesis of double perovskite Cs₂AgInCl₆ nanocrystals (NCs) with a control over their size distribution. In our approach, metal carboxylate precursors and ligands (oleylamine and oleic acid) are dissolved in diphenyl ether and reacted at 105 °C with benzoyl chloride. The resulting Cs₂AgInCl₆ NCs exhibit the expected double perovskite crystal structure, are stable under air, and show a broad spectrum white photoluminescence (PL) with quantum yield of ∼1.6 ± 1%. The optical properties of these NCs were improved by synthesizing Mn-doped Cs₂AgInCl₆ NCs through the simple addition of Mn-acetate to the reaction mixture. The NC products were characterized by the same double perovskite crystal structure, and Mn doping levels up to 1.5%, as confirmed by elemental analyses. The effective incorporation of Mn ions inside Cs₂AgInCl₆ NCs was also proved by means of electron spin resonance spectroscopy. A bright orange emission characterized our Mn-doped Cs₂AgInCl₆ NCs with a PL quantum yield as high as ∼16 ± 4%.

• Author: Federico Locardi; Matilde Cirignano; Dmitry Baranov; Zhiya Dang; Mirko Prato; Filippo Drago; Maurizio Ferretti; Valerio Pinchetti; Marco Fanciulli; Sergio Brovelli; Luca De Trizio; Liberato Manna
• Publishing year: 2018-10-10
• Language: English
• Pages: 12989-12995
• Publication/Series: Journal of the American Chemical Society
• Volume: 140
• Issue: 40
• Links: http://dx.doi.org/10.1021/jacs.8b07983
• Document type: Journal article
• Publisher: The American Chemical Society (ACS)
• Status: Published
• ISBN/ISSN/Other: ISSN: 0002-7863