CdTe QD/Er3+-doped SiO2-Nb2O5 nanocomposites: Ther... - BV FAPESP
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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.)

CdTe QD/Er3+-doped SiO2-Nb2O5 nanocomposites: Thermal, structural and photophysical properties

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Author(s):
Marcondes, Lia Mara [1] ; Ravaro, Leandro Piaggi [2] ; Stucchi de Camargo, Andrea Simone [2] ; Manzani, Danilo [3] ; Poirier, Gael Yves [1]
Total Authors: 5
Affiliation:
[1] Univ Fed Alfenas, Grp Quim Mat, Campus Pocos de Caldas, Pocos De Caldas, MG - Brazil
[2] Univ Sao Paulo, Lab Espectroscopia Mat Funcionais, Inst Fis Sao Carlos, Sao Carlos, SP - Brazil
[3] Univ Sao Paulo, Inst Quim Sao Carlos, Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Optical Materials; v. 113, MAR 2021.
Web of Science Citations: 0
Abstract

CdTe/Er3+-codoped SiO2-Nb2O5-based nanocomposites were prepared by a sol-gel route. The thermal, structural and photophysical properties were investigated by FTIR spectroscopy, N2 adsorption/desorption isotherms, XRD, TGA and DSC analysis, TEM images, UV-Vis spectroscopy, and photoluminescence. The influence of QDs content and niobium/erbium addition on these properties were studied. It is shown that the QDs content into the nanocomposites influences their average size and photoluminescence properties. High QDs content resulted in larger nanocomposite pore size and higher QDs average size. The average pore size created by QDs-doped samples has dimensions suitable for QD adsorption. The TEM images and photoluminescence results demonstrate the successful incorporation of CdTe QDs into the SiO2-Nb2O5 host, which results in a homogeneous nanocomposite material presenting tunable fluorescence in the range of 513-568 nm in function of QD content. Furthermore, CdTe-doped SiO2-Nb2O5-based mesoporous nanocomposite allows the QD chemical stability capped by MPA. These nanocomposites may have a potentially broad application as photonic devices, such as broadband emission devices, optical amplification and lighting. (AU)

FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 18/16126-7 - Optically active glasses for photonic applications: synthesis, characterization and applications of quantum dots embedded in oxide glasses.
Grantee:Danilo Manzani
Support Opportunities: Regular Research Grants
FAPESP's process: 16/17495-0 - New photonic materials based on Cu(I) complexes, upconverting nanoparticles and quantum dots
Grantee:Leandro Piaggi Ravaro
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor