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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Revealing the Role of Tin(IV) Halides in the Anisotropic Growth of CsPbX3 Perovskite Nanoplates

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Author(s):
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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]
Total Authors: 11
Affiliation:
[1] Univ Estadual Campinas, Inst Quim, POB 6154, Campinas 13083970, SP - Brazil
[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, POB 6165, Campinas 13083970, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION; MAY 2020.
Web of Science Citations: 0
Abstract

CsPbX3 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. Sn4+ disturbs the acid-base equilibrium of the system, increasing the protonation rate of oleylamine and inducing anisotropic growth of nanocrystals. Sn4+ 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)

FAPESP's process: 14/50906-9 - INCT 2014: in Functional Complex Materials
Grantee:Fernando Galembeck
Support type: Research Projects - Thematic Grants
FAPESP's process: 18/15574-6 - Advanced spectroscopy of nanomaterials: from ensemble to single-particle
Grantee:Lázaro Aurélio Padilha Junior
Support type: Research Grants - Young Investigators Grants - Phase 2
FAPESP's process: 17/11986-5 - Research Division 1 - Dense Energy Carriers
Grantee:Ana Flávia Nogueira
Support type: Research Grants - Research Centers in Engineering Program
FAPESP's process: 16/02268-9 - Hybrid nanocomposites composed of cesium lead-halide perovskite quantum dots and semiconducting polymers for third generation solar cells
Grantee:Raphael Fernando Moral
Support type: Scholarships in Brazil - Master
FAPESP's process: 13/16911-2 - Advanced spectroscopy of novel nanomaterials
Grantee:Lázaro Aurélio Padilha Junior
Support type: Research Grants - Young Investigators Grants