Agradecimentos: We thank the Sao Paulo Research Foundation (FAPESP) and CNPq for the financial support. G.N. acknowledges CNPq, L.G.B. and D.B.A. thanks CAPES, and R.F.M. acknowledges FAPESP (fellowship with process number 2016/02268-9), for their scholarships. A.F.N. and J.C.G. gratefully...

Agradecimentos: We thank the Sao Paulo Research Foundation (FAPESP) and CNPq for the financial support. G.N. acknowledges CNPq, L.G.B. and D.B.A. thanks CAPES, and R.F.M. acknowledges FAPESP (fellowship with process number 2016/02268-9), for their scholarships. A.F.N. and J.C.G. gratefully acknowledge support from FAPESP (Grant 2017/11986-5) and Shell and the strategic importance of the support given by ANP (Brazil's National Oil, Natural Gas and Biofuels Agency) through the R&D levy regulation. L.A.P., G.N. and A.A. thanks FAPESP grant no. 2013/16911-2 and no. 2018/15574-6. We thank to Prof. Andrew Watt from Department of Materials at University of Oxford for the XPS measurements. Transmission Electron Microscopy was partially supported through INCT/INOMAT (National Institute for Complex Functional Materials) by grant no. 2014/50906-9, São Paulo Research Foundation (FAPESP) and grant no. 465452/2014-0, National Council for Scientific and Technological Development (CNPq/MCTIC). All authors acknowledge LNNano at CNPEM for the permission to acquire HR-TEM images

Abstract: 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...

Abstract: 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

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2013/16911-2; 2014/50906-9; 2016/02268-9; 2017/11986-5; 2018/15574-6

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

465452/2014-0

COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES

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