Ou Hai, Peng Li, Jian Li, Bin Qin, Tong Li, Zechuan Qi, Qiang Ren, Yuanting Wu
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引用次数: 0
Abstract
A new type of lead-free perovskite Cs3Bi2Br9 nanocrystal (NCs) was synthesized by thermal injection method at 190 °C, according to X-ray diffraction and theoretical analysis, the Cs3Bi2Br9 NCs belongs to the monoclinic system C12/c1. We report for the first time that the luminescence intensity of broad-peak-emitting Cs3Bi2Br9 is significantly improved by doping with K+, and the full-width at half maximum (FWHM) of sample Cs3Bi2Br9:0.2K+ is 124 nm. Herein, the stability of Cs3Bi2Br9:xK was monitored and found to have excellent environmental stability, thermal stability, and photostability. In addition, Cs3Bi2Br9:0.2K was coated outside Sr2MgSi2O7:Eu2+,Dy3+ (SMS) to form a core-shell structure composite material Cs3Bi2Br9:0.2K+/SMS@SiO2 and achieved fine tuning of the afterglow color. This work increases the luminescence intensity of Cs3Bi2Br9 by ion doping and exhibits excellent stability, in addition to the cladding of lead-free perovskites with long afterglow materials provides a new application strategy for lead-free perovskites.
期刊介绍：
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.
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