Revealing the Role of Tin(IV) Halides in the Anisotropic Growth of CsPbX(3)Perovskite Nanoplates

Autor(es):Mostrar menos -

Bonato, Luiz G. ^{[1, 2]} ; Moral, Raphael F. ^[1] ; Nagamine, Gabriel ^[2] ; Alo, Arthur ^[2] ; Germino, Jose C. ^[1] ; da Silva, Douglas S. ^[1] ; Almeida, Diogo B. ^[2] ; Zagonel, Luiz F. ^[2] ; Galembeck, Fernando ^[1] ; Padilha, Lazaro A. ^[2] ; Nogueira, Ana Flavia ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Quim, POB 6154, BR-13083970 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, POB 6165, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION; v. 59, n. 28, p. 11501-11509, JUL 6 2020.
• Citações Web of Science: 0

Resumo

CsPbX(3)perovskite nanoplates (PNPLs) were formed in a synthesis driven by SnX4(X=Cl, Br, I) salts. The role played by these hard Lewis acids in directing PNPL formation is addressed. Sn(4+)disturbs the acid-base equilibrium of the system, increasing the protonation rate of oleylamine and inducing anisotropic growth of nanocrystals. Sn(4+)cations influence the reaction dynamics owing to complexation with oleylamine molecules. By monitoring the photoluminescence excitation and photoluminescence (PL) spectra of the PNPLs grown at different temperatures, the influence of the thickness on their optical properties is mapped. Time-resolved and spectrally resolved PL for colloidal dispersions with different optical densities reveals that the dependence of the overall PL lifetime on the emission wavelength do not originate from energy transfer between PNPLs but from the contribution of PNPLs with distinct thickness, indicating that thicker PNPLs exhibit longer PL lifetimes. (AU)

• Processo FAPESP: 14/50906-9 - INCT 2014: em Materiais Complexos Funcionais (INOMAT)
• Beneficiário: Fernando Galembeck
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/15574-6 - Espectroscopia avançada de nanomateriais: de suspensões coloidais à partícula única
• Beneficiário: Lázaro Aurélio Padilha Junior
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores - Fase 2
• Processo FAPESP: 17/11986-5 - Geração e Armazenamento de Novas Energias: trazendo desenvolvimento tecnológico para o país
• Beneficiário: Ana Flávia Nogueira
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 13/16911-2 - Espectroscopia avançada em novos nanomateriais
• Beneficiário: Lázaro Aurélio Padilha Junior
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores