Dispersion and aggregation of quantum dots in polymer-inorganic hybrid films

被引：26

作者：

Matvienko, Oksana O. ^{[1
]}

Savin, Yuri N. ^{[1
]}

Kryzhanovska, Aleksandra S. ^{[1
]}

Vovk, Oleg M. ^{[1
]}

Dobrotvorska, Mariya V. ^{[1
]}

Pogorelova, Nataliya V. ^{[1
]}

Vashchenko, Valerii V. ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, Inst Single Crystals, State Sci Inst, UA-61001 Kharkov, Ukraine

来源：

THIN SOLID FILMS | 2013年 / 537卷

关键词：

Hybrid films; CdSe/ZnS quantum dot; Poly(9-vinylcarbazole); Poly(9,9-di-n-octylfluorenyl-2,7-diyl); Dispersion; DEPLETION FLOCCULATION; NANOCRYSTALS; ELECTROLUMINESCENCE;

D O I：

10.1016/j.tsf.2013.03.046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanisms of dispersion of spherical CdSe/ZnS quantum dots (QD) in the polymer-inorganic nanocomposite thin films based on two types of polymers poly(9-vinylcarbazole) (PVK) and poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO) have been studied. The radial distribution function (RDF) and the potential of mean force (PMF) in these composite films with QD concentration from 17 to 80 wt.% were determined. Analysis of RDF and PMF of the obtained composites PVK/QD and PFO/QD has revealed the three different states of QD spatial organization as a function of the polymer-QD interaction. Using transmission electron microscopy and X-ray photoelectron spectroscopy, it was shown that the PVK/QD composites tend to phase segregate with the formation of bilayer structures, whereas in the PFO/QD composites uniform distribution of QDs occurs. The results showed that the morphology has a significant impact on the optical properties of nanocomposites. In the PVK/QD nanocomposites a photoluminescence quenching is observed with the increase of QD concentration unlike in the PFO/QD nanocomposites. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：226 / 230

页数：5

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