Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals

Alexander N. Poddubny; Valentina M. Litvyak; Mikhail O. Nestoklon; Roman V. Cherbunin; Valerii V. Golubkov; Petr A. Onushchenko; Anastasiya N. Babkina; Alexei A. Onushchenko; Serguei V. Goupalov

doi:10.1021/acs.jpcc.7b10778

Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals

Alexander N. Poddubny, Valentina M. Litvyak, Mikhail O. Nestoklon, Roman V. Cherbunin, Valerii V. Golubkov, Petr A. Onushchenko, Anastasiya N. Babkina, Alexei A. Onushchenko, Serguei V. Goupalov

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

Abstract

We study light absorption by nearly monodisperse PbS nanocrystals grown in a glass matrix. The absorption spectra demonstrate a well-resolved structure at energies above the first absorption peak. The absorption cross sections are calculated with an empirical tight-binding model accounting for the quantum confinement, the band anisotropy, and valley splittings. Absorption spectra measured at 4 K quantitatively agree with the atomistic calculations. This allows us to unambiguously ascribe the much-debated second absorption peak to the p-p optical transition and directly measure the splitting of excited p states.

Original language	English
Pages (from-to)	27766-27773
Number of pages	8
Journal	Journal of Physical chemistry c
Volume	121
Issue number	49
DOIs	https://doi.org/10.1021/acs.jpcc.7b10778
State	Published - 14 Dec 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
General Energy
Surfaces, Coatings and Films
Physical and Theoretical Chemistry

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10.1021/acs.jpcc.7b10778

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title = "Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals",

abstract = "We study light absorption by nearly monodisperse PbS nanocrystals grown in a glass matrix. The absorption spectra demonstrate a well-resolved structure at energies above the first absorption peak. The absorption cross sections are calculated with an empirical tight-binding model accounting for the quantum confinement, the band anisotropy, and valley splittings. Absorption spectra measured at 4 K quantitatively agree with the atomistic calculations. This allows us to unambiguously ascribe the much-debated second absorption peak to the p-p optical transition and directly measure the splitting of excited p states.",

author = "Poddubny, {Alexander N.} and Litvyak, {Valentina M.} and Nestoklon, {Mikhail O.} and Cherbunin, {Roman V.} and Golubkov, {Valerii V.} and Onushchenko, {Petr A.} and Babkina, {Anastasiya N.} and Onushchenko, {Alexei A.} and Goupalov, {Serguei V.}",

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

year = "2017",

month = dec,

day = "14",

doi = "10.1021/acs.jpcc.7b10778",

language = "الإنجليزيّة",

volume = "121",

pages = "27766--27773",

journal = "Journal of Physical chemistry c",

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publisher = "American Chemical Society",

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TY - JOUR

T1 - Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals

AU - Poddubny, Alexander N.

AU - Litvyak, Valentina M.

AU - Nestoklon, Mikhail O.

AU - Cherbunin, Roman V.

AU - Golubkov, Valerii V.

AU - Onushchenko, Petr A.

AU - Babkina, Anastasiya N.

AU - Onushchenko, Alexei A.

AU - Goupalov, Serguei V.

PY - 2017/12/14

Y1 - 2017/12/14

N2 - We study light absorption by nearly monodisperse PbS nanocrystals grown in a glass matrix. The absorption spectra demonstrate a well-resolved structure at energies above the first absorption peak. The absorption cross sections are calculated with an empirical tight-binding model accounting for the quantum confinement, the band anisotropy, and valley splittings. Absorption spectra measured at 4 K quantitatively agree with the atomistic calculations. This allows us to unambiguously ascribe the much-debated second absorption peak to the p-p optical transition and directly measure the splitting of excited p states.

AB - We study light absorption by nearly monodisperse PbS nanocrystals grown in a glass matrix. The absorption spectra demonstrate a well-resolved structure at energies above the first absorption peak. The absorption cross sections are calculated with an empirical tight-binding model accounting for the quantum confinement, the band anisotropy, and valley splittings. Absorption spectra measured at 4 K quantitatively agree with the atomistic calculations. This allows us to unambiguously ascribe the much-debated second absorption peak to the p-p optical transition and directly measure the splitting of excited p states.

UR - http://www.scopus.com/inward/record.url?scp=85038392786&partnerID=8YFLogxK

U2 - 10.1021/acs.jpcc.7b10778

DO - 10.1021/acs.jpcc.7b10778

M3 - مقالة

SN - 1932-7447

VL - 121

SP - 27766

EP - 27773

JO - Journal of Physical chemistry c

JF - Journal of Physical chemistry c

IS - 49

ER -

Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals

Abstract

All Science Journal Classification (ASJC) codes

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