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CsPbX3/SiOx (X = Cl, Br, I) monoliths prepared via a novel sol-gel route starting from Cs4PbX6 nanocrystals

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CsPbX3/SiOx (X = Cl, Br, I) monoliths prepared via a novel sol-gel route starting from Cs4PbX6 nanocrystals

dc.contributor.author	Park, Sungwook
dc.contributor.author	An, Mai Ngoc
dc.contributor.author	Almeida, Guilherme
dc.contributor.author	Palazón Huet, Francisco
dc.contributor.author	Spirito, Davide
dc.contributor.author	Krahne, Roman
dc.contributor.author	Dang, Zhiya
dc.contributor.author	De Trizio, Luca
dc.contributor.author	Manna, Liberato
dc.date.accessioned	2020-06-18T09:29:45Z
dc.date.available	2020-09-28T04:45:05Z
dc.date.issued	2019
dc.identifier.citation	Park, Sungwook An, Mai Ngoc Almeida, Guilherme Palazón Huet, Francisco Spirito, Davide Krahne, Roman Dang, Zhiya De Trizio, Luca Manna, Liberato 2019 CsPbX3/SiOx (X = Cl, Br, I) monoliths prepared via a novel sol-gel route starting from Cs4PbX6 nanocrystals Nanoscale 11 18739 18745
dc.identifier.uri	https://hdl.handle.net/10550/75114
dc.description.abstract	We developed a facile synthesis of nanocomposite powders of CsPbX3 nanocrystals (NCs) embedded in silica. The synthesis starts from colloidal Cs4PbX6 NCs that are mixed with tetraethyl orthosilicate in the presence of nitric acid, which triggers the sol-gel reaction yielding the formation of SiOx and the conversion of starting NCs into CsPbX3 ones. The overall reaction delivers CsPbX3 NCs encased in a silica matrix. The resulting CsPbX3/SiOx nano-composite powders exhibited enhanced moisture and thermal stability in air. Also, when mixing different CsPbX3/SiOx samples having diverse anion compositions, no interparticle anion exchange processes were observed, which is a further indication that the silica matrix acts as a robust barrier surrounding the NCs. Finallly, we used these composites as down-converter phosphors on top of a blue light-emitting diode (LED), delivering nearly ideal white light emission with the Commission Internationale de l'Eclairage (CIE) color coordinates (0.32, 0.33).
dc.language.iso	eng
dc.relation.ispartof	Nanoscale, 2019, vol. 11, p. 18739-18745
dc.subject	Nanotecnologia
dc.subject	Semiconductors
dc.title	CsPbX3/SiOx (X = Cl, Br, I) monoliths prepared via a novel sol-gel route starting from Cs4PbX6 nanocrystals
dc.type	journal article	es_ES
dc.date.updated	2020-06-18T09:29:46Z
dc.identifier.doi	10.1039/C9NR07766A
dc.identifier.idgrec	134601
dc.embargo.terms	1 year
dc.rights.accessRights	open access	es_ES