Carrier extraction from metallic perovskite oxide nanoparticles

Calum McDonald; Chengsheng Ni; Vladimir Švrček; Manuel Macias-Montero; Tamilselvan Velusamy; Paul A. Connor; Paul Maguire; John T. S. Irvine; Davide Mariotti

doi:10.1039/d1nr02890a

Carrier extraction from metallic perovskite oxide nanoparticles

Calum McDonald, Chengsheng Ni, Vladimir Švrček, Manuel Macias-Montero, Tamilselvan Velusamy, Paul A. Connor, Paul Maguire, John T. S. Irvine, Davide Mariotti

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Abstract

We observe the extraction of carriers excited between two types of bands in the perovskite oxide, Sr-deficient strontium niobate (Sr0.9NbO3). Sr0.9NbO3 exhibits metallic behaviour and high conductivity, whilst also displaying broad absorption across the ultraviolet, visible, and near-infrared spectral regions, making it an attractive material for solar energy conversion. Furthermore, the optoelectronic properties of strontium niobate can easily be tuned by varying the Sr fraction or through doping. Sr-deficient strontium niobate exhibits a split conduction band, which enables two types of optical transitions: intraband and interband. However, whether such carriers can be extracted from an unusual material as such remains unproven. In this report, we have overcome the immense challenge of photocarrier extraction by fabricating an extremely thin absorber layer of Sr0.9NbO3 nanoparticles. These findings open up great opportunities to harvest a very broad solar spectral absorption range with reduced recombination losses.

Original language	English
Pages (from-to)	12271-12278
Number of pages	8
Journal	Nanoscale
Volume	13
Issue number	28
Early online date	9 Jul 2021
DOIs	https://doi.org/10.1039/d1nr02890a
Publication status	Published (in print/issue) - 28 Jul 2021

Bibliographical note

Funding Information:
This work was supported by EPSRC (EP/K022237/1, EP/ M024938/1 and EP/R023638/1), the EPSRC Supergen SuperSolar Hub, the Department for Employment and Learning (DEL) of Northern Ireland Studentship, and by the New Energy and Industrial Technology Development Organization (NEDO).

Publisher Copyright:
© The Royal Society of Chemistry.

Keywords

General Materials Science

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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Final published versionFinal published version, 3.35 MBLicence: CC BY

Cite this

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title = "Carrier extraction from metallic perovskite oxide nanoparticles",

abstract = "We observe the extraction of carriers excited between two types of bands in the perovskite oxide, Sr-deficient strontium niobate (Sr0.9NbO3). Sr0.9NbO3 exhibits metallic behaviour and high conductivity, whilst also displaying broad absorption across the ultraviolet, visible, and near-infrared spectral regions, making it an attractive material for solar energy conversion. Furthermore, the optoelectronic properties of strontium niobate can easily be tuned by varying the Sr fraction or through doping. Sr-deficient strontium niobate exhibits a split conduction band, which enables two types of optical transitions: intraband and interband. However, whether such carriers can be extracted from an unusual material as such remains unproven. In this report, we have overcome the immense challenge of photocarrier extraction by fabricating an extremely thin absorber layer of Sr0.9NbO3 nanoparticles. These findings open up great opportunities to harvest a very broad solar spectral absorption range with reduced recombination losses.",

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author = "Calum McDonald and Chengsheng Ni and Vladimir {\v S}vr{\v c}ek and Manuel Macias-Montero and Tamilselvan Velusamy and Connor, {Paul A.} and Paul Maguire and Irvine, {John T. S.} and Davide Mariotti",

note = "Funding Information: This work was supported by EPSRC (EP/K022237/1, EP/ M024938/1 and EP/R023638/1), the EPSRC Supergen SuperSolar Hub, the Department for Employment and Learning (DEL) of Northern Ireland Studentship, and by the New Energy and Industrial Technology Development Organization (NEDO). Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

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T1 - Carrier extraction from metallic perovskite oxide nanoparticles

AU - McDonald, Calum

AU - Ni, Chengsheng

AU - Švrček, Vladimir

AU - Macias-Montero, Manuel

AU - Velusamy, Tamilselvan

AU - Connor, Paul A.

AU - Maguire, Paul

AU - Irvine, John T. S.

AU - Mariotti, Davide

N1 - Funding Information: This work was supported by EPSRC (EP/K022237/1, EP/ M024938/1 and EP/R023638/1), the EPSRC Supergen SuperSolar Hub, the Department for Employment and Learning (DEL) of Northern Ireland Studentship, and by the New Energy and Industrial Technology Development Organization (NEDO). Publisher Copyright: © The Royal Society of Chemistry.

PY - 2021/7/28

Y1 - 2021/7/28

N2 - We observe the extraction of carriers excited between two types of bands in the perovskite oxide, Sr-deficient strontium niobate (Sr0.9NbO3). Sr0.9NbO3 exhibits metallic behaviour and high conductivity, whilst also displaying broad absorption across the ultraviolet, visible, and near-infrared spectral regions, making it an attractive material for solar energy conversion. Furthermore, the optoelectronic properties of strontium niobate can easily be tuned by varying the Sr fraction or through doping. Sr-deficient strontium niobate exhibits a split conduction band, which enables two types of optical transitions: intraband and interband. However, whether such carriers can be extracted from an unusual material as such remains unproven. In this report, we have overcome the immense challenge of photocarrier extraction by fabricating an extremely thin absorber layer of Sr0.9NbO3 nanoparticles. These findings open up great opportunities to harvest a very broad solar spectral absorption range with reduced recombination losses.

AB - We observe the extraction of carriers excited between two types of bands in the perovskite oxide, Sr-deficient strontium niobate (Sr0.9NbO3). Sr0.9NbO3 exhibits metallic behaviour and high conductivity, whilst also displaying broad absorption across the ultraviolet, visible, and near-infrared spectral regions, making it an attractive material for solar energy conversion. Furthermore, the optoelectronic properties of strontium niobate can easily be tuned by varying the Sr fraction or through doping. Sr-deficient strontium niobate exhibits a split conduction band, which enables two types of optical transitions: intraband and interband. However, whether such carriers can be extracted from an unusual material as such remains unproven. In this report, we have overcome the immense challenge of photocarrier extraction by fabricating an extremely thin absorber layer of Sr0.9NbO3 nanoparticles. These findings open up great opportunities to harvest a very broad solar spectral absorption range with reduced recombination losses.

KW - General Materials Science

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SN - 2040-3364

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EP - 12278

JO - Nanoscale

JF - Nanoscale

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ER -

Carrier extraction from metallic perovskite oxide nanoparticles

Abstract

Bibliographical note

Keywords

UN SDGs

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