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Mechanochemical synthesis of inorganic halide perovskites: evolution of phase-purity, morphology, and photoluminescence

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Mechanochemical synthesis of inorganic halide perovskites: evolution of phase-purity, morphology, and photoluminescence

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dc.contributor.author	Palazón Huet, Francisco
dc.contributor.author	El Ajjouri, Yousra
dc.contributor.author	Sebastia-Luna, Paz
dc.contributor.author	Lauciello, Simone
dc.contributor.author	Manna, Liberato
dc.contributor.author	Bolink, Henk
dc.date.accessioned	2020-02-24T14:21:39Z
dc.date.available	2020-02-24T14:21:39Z
dc.date.issued	2019
dc.identifier.citation	Palazón Huet, Francisco El Ajjouri, Yousra Sebastia-Luna, Paz Lauciello, Simone Manna, Liberato Bolink, Henk 2019 Mechanochemical synthesis of inorganic halide perovskites: evolution of phase-purity, morphology, and photoluminescence Journal Of Materials Chemistry C 7 11406 11410
dc.identifier.uri	https://hdl.handle.net/10550/73218
dc.description.abstract	Dry mechanochemical ball-milling of halide precursor salts is a promising route for the synthesis of high-purity halide perovskites in a fast and solvent-free manner. However, there is a lack of information on the process mechanisms, kinetics, and possible side-effects. Here, we investigated in detail the mechanochemical synthesis of fully-inorganic CsPbBr3 by ball-milling of stoichiometric CsBr and PbBr2. Detailed structural, morphological and optical analyses reveal several beneficial and detrimental effects of milling as a function of time. Three stages are identified during the process: (i) at short milling times (t < 5 min) different ternary compounds are formed, including stoichiometric CsPbBr3 as well as Cs4PbBr6, and to a lesser extent, CsPb2Br5. Photoluminescence from "nano" and "bulk" CsPbBr3 species is observed, centered at 525 nm and 545 nm, respectively. (ii) At the optimum time (around 5 min for the present case) the complete transformation of all reactants and byproducts into phase-pure CsPbBr3 has occurred. Photoluminescence corresponds to bulk CsPbBr3; (iii) at much longer milling times (up to 10 hours) eventually smaller quantum-confined CsPbBr3 NCs are exfoliated from the bulk product leading to a broad and blue-shifted emission. At this stage the photoluminescence intensity is strongly reduced which is ascribed to the formation of surface defects induced by ball-milling in dry conditions.
dc.language.iso	eng
dc.relation.ispartof	Journal Of Materials Chemistry C, 2019, vol. 7, p. 11406-11410
dc.subject	Materials
dc.title	Mechanochemical synthesis of inorganic halide perovskites: evolution of phase-purity, morphology, and photoluminescence
dc.type	journal article	es_ES
dc.date.updated	2020-02-24T14:21:39Z
dc.identifier.doi	10.1039/C9TC03778K
dc.identifier.idgrec	134559
dc.rights.accessRights	open access	es_ES