Specific features of luminescence quenching in a nematic liquid crystal doped with nanoparticles
- 作者: Kurochkina M.A.1, Konshina E.A.1, Shcherbinin D.P.1
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隶属关系:
- ITMO University
- 期: 卷 121, 编号 4 (2016)
- 页面: 585-591
- 栏目: Condensed-Matter Spectroscopy
- URL: https://journal-vniispk.ru/0030-400X/article/view/165084
- DOI: https://doi.org/10.1134/S0030400X16100118
- ID: 165084
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The change in the intensity of the photoluminescence (PL) spectra of nematic liquid crystal (NLC) composites as a function of the concentration of CdSe/ZnS semiconductor quantum dots (QDs) and TiO2 and ZrO2 nanoparticles ~5 nm in diameter has been investigated. It is shown that the PL-quenching intensity in composites with CdSe/ZnS QDs exceeds that in composites with TiO2 and ZrO2 nanoparticles. The lowfrequency spectra of these composites with a concentration of 0.1 wt %, recorded in the range of 102–103 Hz, and the content of mobile ions in them have been investigated. It is found that the dielectric loss in the composite with CdSe/ZnS QDs is much higher and the content of mobile ions is larger by a factor of 3 than in the composites with TiO2 and ZrO2 nanoparticles. It is shown that an increase in the CdSe/ZnS QD concentration in NLC composites leads to an increase in the dielectric loss and a decrease in the PL intensity. Possible mechanisms of the interaction between NLC molecules and CdSe/ZnS QDs are discussed.
作者简介
M. Kurochkina
ITMO University
Email: eakonshina@mail.ru
俄罗斯联邦, St. Petersburg, 197101
E. Konshina
ITMO University
编辑信件的主要联系方式.
Email: eakonshina@mail.ru
俄罗斯联邦, St. Petersburg, 197101
D. Shcherbinin
ITMO University
Email: eakonshina@mail.ru
俄罗斯联邦, St. Petersburg, 197101
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