Improving Photoluminescence Quantum Yield of CdTe Quantum Dots Using a Binary Solvent (Water plus Glycerin) in the One-Pot Approach Synthesis

被引：7

作者：

da Rosa, Lucas T. A. ^{[1
]}

Aversa, Isabella F. S. ^{[1
]}

Raphael, Ellen ^{[1
,2
]}

Polo, Andre S. ^{[3
]}

Duarte, Alfredo ^{[4
]}

Schiavon, Marco A. ^{[5
]}

Virtuoso, Luciano S. ^{[1
]}

机构：

[1] Univ Fed Alfenas UNIFAL, Inst Quim, BR-37130000 Alfenas, MG, Brazil

[2] Univ Estado Amazonas UEA, Escola Super Tecnol EST, BR-69050020 Manaus, AM, Brazil

[3] Univ Fed ABC UFABC, Ctr Ciencias Nat & Humanas, BR-09210580 Santo Andre, SP, Brazil

[4] Univ Sao Paulo, Dept Quim Fundamental, BR-05508000 Sao Paulo, SP, Brazil

[5] Univ Fed Sao Joao Del Rei, Dept Ciencias Nat, Campus Dom Bosco,Praca Dom Helvecio 74, BR-36301160 Sao Joao Del Rei, MG, Brazil

来源：

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 2021年 / 32卷 / 04期

关键词：

CdTe; quantum dots; one-pot synthesis; synthesis conditions; TEMPERATURE-DEPENDENT EXCITON; MICROWAVE IRRADIATION; AQUEOUS SYNTHESIS; NANOCRYSTALS; CDSE; DYNAMICS; NANOPARTICLES;

D O I：

10.21577/0103-5053.20200237

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The present work describes the comparison of the optical and structural properties between CdTe quantum dots (QD) synthesized in water and in the binary solvent (water + glycerin) via one-pot approach synthesis. The optical properties of the nanocrystals obtained with different synthesis parameters were characterized by UV-visible and photoluminescence spectroscopies. The structural chracterization were performed by Fourier transform infrared spectroscopy (FTIR), zeta potential, size-distribution by dynamic light scattering (DLS), X-ray diffraction (XRD), and also by high-resolution transmission electron microscopy (HRTEM). The optical properties of CdTe QD when synthesized in the binary solvent were better, resulting in the increase of photoluminescence quantum yield (Of). The CdTe QD prepared in 120 min, at pH 10.0, in the Cd:Te molar ratio 20:1, using the molar ratio 1:1.5 of Cd:TGA (thioglycolic acid), exhibited a narrow photoluminescence band and enhanced Of for the samples synthesized in a binary solvent in comparison to water solvent (58.4 and 49.5%, respectively).

引用

页码：860 / 868

页数：9

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