Journal of Luminescence, volume 208, pages 193-200

Luminescence and nonlinear optical properties of colloidal Ag2S quantum dots

Tamara S. Kondratenko ¹

Andrey I. Zvyagin ¹

Mikhail Smirnov ¹

Irina G. Grevtseva ¹

Aleksey S. Perepelitsa ¹

O.V. Ovchinnikov ¹

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Department of Optics and Spectroscopy, Voronezh State University, Voronezh 394018, Russia |

Publication type: Journal Article

Publication date: 2019-04-01

Elsevier

Journal: Journal of Luminescence

Quartile SCImago

Quartile WOS

Impact factor: 3.6

ISSN: 00222313

DOI: 10.1016/j.jlumin.2018.12.042

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General Chemistry

Biochemistry

Biophysics

Atomic and Molecular Physics, and Optics

Condensed Matter Physics

Abstract

Abstract The relationship of the spectral luminescent and nonlinear optical properties of Ag2S quantum dots (QDs), passivated with thioglycolic acid (Ag2S QDs/TGA) and Ag2S QDs, stabilized by gelatin (Ag2S QDs/Gel) with average sizes from 1.5 nm to 2.1 nm is found. Colloidal Ag2S QDs/TGA with different sizes, having the exciton (620 nm) and recombination (660 nm, 880 nm and 1205 nm) luminescence were studied using the methods of luminescent spectroscopy, luminescence decay, and Z-scans technique at the wavelengths of 532 nm using 10 ns pulses. Resonant two-photon transitions of reverse saturated absorption (RSA) were found for samples with recombination luminescence. In addition, the nonlinear refraction of thermal nature was observed using Z-scan method. Predominantly weak two-photon absorption (TPA) and nonlinear refraction (NR) of non-thermal nature occur for Ag2S/TGA quantum dots with exciton luminescence. The luminescence lifetimes support this conclusion. The differences in luminescence lifetimes of samples are associated with different state of interfaces for colloidal Ag2S QDs/TGA with recombination and exciton luminescence. This conclusion was confirmed by FTIR spectroscopy of colloidal Ag2S QDs/TGA solutions, synthesized under different conditions. RSA is characteristic of samples with a noticeable concentration of trap states acting as recombination luminescence centers (660 nm). The maximum effect was noted for Ag2S QDs with recombination luminescence in the region of 660 nm, 880 nm, 1205 nm. The fast component of this luminescence decay has a time constant of about 0.8 ns. It decay 5 times for the first 10 ns. In the case of Ag2S QDs/TGA with exciton luminescence (620 nm) there are no appropriate conditions for RSA. The fast component of luminescence decay has a time constant of 0.8 ns. The luminescence intensity decreases 50 times for the first 10 ns. In this case, TPA and nonlinear refraction of non-thermal nature take place, and RSA is absent.

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IEEE	IEEE, 1, 2.78% IEEE 1 publication, 2.78%
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Kondratenko T. S. et al. Luminescence and nonlinear optical properties of colloidal Ag2S quantum dots // Journal of Luminescence. 2019. Vol. 208. pp. 193-200.

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Kondratenko T. S., Zvyagin A. I., Smirnov M., Grevtseva I. G., Perepelitsa A. S., Ovchinnikov O. Luminescence and nonlinear optical properties of colloidal Ag2S quantum dots // Journal of Luminescence. 2019. Vol. 208. pp. 193-200.

RIS |

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RIS Copy

TY - JOUR

DO - 10.1016/j.jlumin.2018.12.042

UR - https://doi.org/10.1016/j.jlumin.2018.12.042

TI - Luminescence and nonlinear optical properties of colloidal Ag2S quantum dots

T2 - Journal of Luminescence

AU - Kondratenko, Tamara S.

AU - Zvyagin, Andrey I.

AU - Smirnov, Mikhail

AU - Grevtseva, Irina G.

AU - Perepelitsa, Aleksey S.

AU - Ovchinnikov, O.V.

PY - 2019

DA - 2019/04/01 00:00:00

PB - Elsevier

SP - 193-200

VL - 208

SN - 0022-2313

ER -

BibTex

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BibTex Copy

@article{2019_Kondratenko,

author = {Tamara S. Kondratenko and Andrey I. Zvyagin and Mikhail Smirnov and Irina G. Grevtseva and Aleksey S. Perepelitsa and O.V. Ovchinnikov},

title = {Luminescence and nonlinear optical properties of colloidal Ag2S quantum dots},

journal = {Journal of Luminescence},

year = {2019},

volume = {208},

publisher = {Elsevier},

month = {apr},

url = {https://doi.org/10.1016/j.jlumin.2018.12.042},

pages = {193--200},

doi = {10.1016/j.jlumin.2018.12.042}

}

Found error?

Publisher

Elsevier

Journal

Journal of Luminescence

Quartile SCImago

Quartile WOS

Impact factor

3.6

ISSN

00222313 (Print)