Intrinsic stability analysis of perovskite nanopowder with double and triple cation in a site, FAxMA(1-x)PbI3 and FAxCsyMA(1-x-y)PbI3. (November 2019)

• Record Type: Journal Article
• Authors: Gallardo, Juan Jesús; Barea-Sepúlveda, Marta; Aguilar, Teresa; Alcántara, Rodrigo; Fernández-Lorenzo, Concha; Navas, Javier
• Is Part Of: Materials research bulletin. Volume 119(2019)
• Publication Date: 2019-11
• Subjects: A. Optical materials -- B. Chemical synthesis -- B. Optical properties -- C. X-ray diffraction -- D. Electrochemical properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2019.110528
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Intrinsic stability of A-doping perovskite was analysed. The effect on stability and optical properties of FA and Cs ions was studied. FA0.1Cs0.1MA0.8PbI3 showed a well-defined crystalline structure stable over time. The introduction of 10% Cs stabilized the crystalline phase of the perovskite. Abstract: Inorganic-organic hybrid perovskites are being widely studied due to their interesting optical and electronic properties, although certain stability-related problems have previously been reported. For obtaining ABX3 -type inorganic-organic hybrid perovskites with a crystalline structure stable over time and optimized band gap values for photovoltaics, this study presents the synthesis and characterization of hybrid perovskite nanopowders in which the A site is occupied by two or three cations (FAx MA(1-x) PbI3 and FAx Csy MA(1-x-y) PbI3 ). DR-UV–vis spectroscopy was used to study the time evolution of the optical properties. X-ray diffraction was applied to study the evolution of the crystallinity of the nanopowders synthesized. Among all the perovskites synthesized, FA0.1 MA0.9 PbI3 and FA0.1 Cs0.1 MA0.8 PbI3 showed cubic crystalline structure that remained stable over time and optical band gap values of 1.48 eV and 1.47 eV, respectively. Therefore, with A-site doping, it was possible to synthesize perovskite nanopowders with an enhanced structure and improved optical properties with regard to MAPbI3 perovskite.