Photoluminescence of Lead Sulfide Quantum Dots of Different Sizes in a Nanoporous Silicate Glass Matrix

Aleksandr P. Litvin; Anton A. Babaev; Peter S. Parfenov; Elena V. Ushakova; Mikhail A. Baranov; Olga V. Andreeva; Kevin Berwick; Anatoly V. Fedorov; Alexander V. Baranov

doi:10.1021/acs.jpcc.7b01952

Photoluminescence of Lead Sulfide Quantum Dots of Different Sizes in a Nanoporous Silicate Glass Matrix

Aleksandr P. Litvin, Anton A. Babaev, Peter S. Parfenov, Elena V. Ushakova, Mikhail A. Baranov, Olga V. Andreeva, Kevin Berwick, Anatoly V. Fedorov, Alexander V. Baranov

Research output: Contribution to journal › Article › peer-review

Abstract

The optical properties of lead sulfide quantum dots (QDs) of different sizes embedded in a nanoporous silicate glass matrix (NSM) are investigated by steady-state and transient photoluminescence spectroscopy. The use of this matrix allows the fabrication of samples with reproducible optical characteristics, for both isolated and close-packed QDs. Low-temperature PL analysis of isolated QDs with sizes of 3.7 and 4.5 nm shows that the coefficient of temperature shift of the PL position changes sign with reducing QD size because of size-dependent contributions from thermal expansion, mechanical strain, and electron-phonon coupling. The PL intensity is determined by size-dependent splitting of the lowest energy electronic state. (Graph Presented).

Original language	English
Pages (from-to)	8645-8652
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	121
Issue number	15
DOIs	https://doi.org/10.1021/acs.jpcc.7b01952
Publication status	Published - 20 Apr 2017

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title = "Photoluminescence of Lead Sulfide Quantum Dots of Different Sizes in a Nanoporous Silicate Glass Matrix",

abstract = "The optical properties of lead sulfide quantum dots (QDs) of different sizes embedded in a nanoporous silicate glass matrix (NSM) are investigated by steady-state and transient photoluminescence spectroscopy. The use of this matrix allows the fabrication of samples with reproducible optical characteristics, for both isolated and close-packed QDs. Low-temperature PL analysis of isolated QDs with sizes of 3.7 and 4.5 nm shows that the coefficient of temperature shift of the PL position changes sign with reducing QD size because of size-dependent contributions from thermal expansion, mechanical strain, and electron-phonon coupling. The PL intensity is determined by size-dependent splitting of the lowest energy electronic state. (Graph Presented).",

author = "Litvin, {Aleksandr P.} and Babaev, {Anton A.} and Parfenov, {Peter S.} and Ushakova, {Elena V.} and Baranov, {Mikhail A.} and Andreeva, {Olga V.} and Kevin Berwick and Fedorov, {Anatoly V.} and Baranov, {Alexander V.}",

note = "Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2017",

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doi = "10.1021/acs.jpcc.7b01952",

language = "English",

volume = "121",

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T1 - Photoluminescence of Lead Sulfide Quantum Dots of Different Sizes in a Nanoporous Silicate Glass Matrix

AU - Litvin, Aleksandr P.

AU - Babaev, Anton A.

AU - Parfenov, Peter S.

AU - Ushakova, Elena V.

AU - Baranov, Mikhail A.

AU - Andreeva, Olga V.

AU - Berwick, Kevin

AU - Fedorov, Anatoly V.

AU - Baranov, Alexander V.

PY - 2017/4/20

Y1 - 2017/4/20

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AB - The optical properties of lead sulfide quantum dots (QDs) of different sizes embedded in a nanoporous silicate glass matrix (NSM) are investigated by steady-state and transient photoluminescence spectroscopy. The use of this matrix allows the fabrication of samples with reproducible optical characteristics, for both isolated and close-packed QDs. Low-temperature PL analysis of isolated QDs with sizes of 3.7 and 4.5 nm shows that the coefficient of temperature shift of the PL position changes sign with reducing QD size because of size-dependent contributions from thermal expansion, mechanical strain, and electron-phonon coupling. The PL intensity is determined by size-dependent splitting of the lowest energy electronic state. (Graph Presented).

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DO - 10.1021/acs.jpcc.7b01952

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JF - Journal of Physical Chemistry C

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ER -

Photoluminescence of Lead Sulfide Quantum Dots of Different Sizes in a Nanoporous Silicate Glass Matrix

Abstract

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