Optical properties of alloyed PbSe xS 1-x nanorods

Anna Rubin Brusilovski; Dikla Kolan; Georgy I. Maikov; Roman Vaxenburg; Aldona Sashchiuk; Efrat Lifshitz

doi:10.1557/opl.2012.721

Optical properties of alloyed PbSe _xS _1-x nanorods

Anna Rubin Brusilovski, Dikla Kolan, Georgy I. Maikov, Roman Vaxenburg, Aldona Sashchiuk, Efrat Lifshitz

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

We report the synthesis, structural and optical characterization of PbSe _xS _1-x nanorods with diameter between 2 nm to 4.5 nm and length of 12 nm to 24 nm. Their typical photoluminescence spectra exhibit a split of the band-edge exciton band. The temperature dependence photoluminescence of these nanorods revealed a relatively small band-gap temperature coefficient and a mild extension of the radiative lifetime at cryogenic temperatures - all in comparison with photoluminescence processes in PbSe nanorods, as well as in PbSe _xS _1-x quantum dots, with similar absorption band-edge energy. A theoretical model associates the experimental observations to the occurrence of independent transitions from either degenerate or non-degenerate band-edge valleys in PbSe _xS _1-x nanorods, each of which possessing a relatively small electron-hole exchange interaction.

Original language	English
Title of host publication	Organic Photovoltaics - Materials to Devices
Pages	175-185
Number of pages	11
DOIs	https://doi.org/10.1557/opl.2012.721
State	Published - 2012
Externally published	Yes
Event	2011 MRS Fall Meeting - Boston, MA, United States Duration: 28 Nov 2011 → 2 Dec 2011

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1390
ISSN (Print)	0272-9172

Conference

Conference	2011 MRS Fall Meeting
Country/Territory	United States
City	Boston, MA
Period	28/11/11 → 2/12/11

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1557/opl.2012.721

Cite this

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title = "Optical properties of alloyed PbSe xS 1-x nanorods",

abstract = "We report the synthesis, structural and optical characterization of PbSe xS 1-x nanorods with diameter between 2 nm to 4.5 nm and length of 12 nm to 24 nm. Their typical photoluminescence spectra exhibit a split of the band-edge exciton band. The temperature dependence photoluminescence of these nanorods revealed a relatively small band-gap temperature coefficient and a mild extension of the radiative lifetime at cryogenic temperatures - all in comparison with photoluminescence processes in PbSe nanorods, as well as in PbSe xS 1-x quantum dots, with similar absorption band-edge energy. A theoretical model associates the experimental observations to the occurrence of independent transitions from either degenerate or non-degenerate band-edge valleys in PbSe xS 1-x nanorods, each of which possessing a relatively small electron-hole exchange interaction.",

author = "Brusilovski, {Anna Rubin} and Dikla Kolan and Maikov, {Georgy I.} and Roman Vaxenburg and Aldona Sashchiuk and Efrat Lifshitz",

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doi = "10.1557/opl.2012.721",

language = "English",

isbn = "9781605113678",

series = "Materials Research Society Symposium Proceedings",

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T1 - Optical properties of alloyed PbSe xS 1-x nanorods

AU - Brusilovski, Anna Rubin

AU - Kolan, Dikla

AU - Maikov, Georgy I.

AU - Vaxenburg, Roman

AU - Sashchiuk, Aldona

AU - Lifshitz, Efrat

PY - 2012

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N2 - We report the synthesis, structural and optical characterization of PbSe xS 1-x nanorods with diameter between 2 nm to 4.5 nm and length of 12 nm to 24 nm. Their typical photoluminescence spectra exhibit a split of the band-edge exciton band. The temperature dependence photoluminescence of these nanorods revealed a relatively small band-gap temperature coefficient and a mild extension of the radiative lifetime at cryogenic temperatures - all in comparison with photoluminescence processes in PbSe nanorods, as well as in PbSe xS 1-x quantum dots, with similar absorption band-edge energy. A theoretical model associates the experimental observations to the occurrence of independent transitions from either degenerate or non-degenerate band-edge valleys in PbSe xS 1-x nanorods, each of which possessing a relatively small electron-hole exchange interaction.

AB - We report the synthesis, structural and optical characterization of PbSe xS 1-x nanorods with diameter between 2 nm to 4.5 nm and length of 12 nm to 24 nm. Their typical photoluminescence spectra exhibit a split of the band-edge exciton band. The temperature dependence photoluminescence of these nanorods revealed a relatively small band-gap temperature coefficient and a mild extension of the radiative lifetime at cryogenic temperatures - all in comparison with photoluminescence processes in PbSe nanorods, as well as in PbSe xS 1-x quantum dots, with similar absorption band-edge energy. A theoretical model associates the experimental observations to the occurrence of independent transitions from either degenerate or non-degenerate band-edge valleys in PbSe xS 1-x nanorods, each of which possessing a relatively small electron-hole exchange interaction.

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