Efficient carrier multiplication in InP nanoparticles

Stuart K. Stubbs; Samantha Hardman; Darren Graham; Ben Spencer; Wendy Flavell; Paul Glarvey; Ombretta Masala; Nigel L. Pickett; David Binks

doi:10.1103/PhysRevB.81.081303

Efficient carrier multiplication in InP nanoparticles

Stuart K. Stubbs, Samantha Hardman, Darren Graham, Ben Spencer, Wendy Flavell, Paul Glarvey, Ombretta Masala, Nigel L. Pickett, David Binks

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

Abstract

Efficient carrier multiplication in InP nanoparticles is reported; ultrafast transient absorption measurements at the band edge were used to determine the number of excitons per photoexcited nanoparticle for a range of both excitation fluences and photon energies. At photon energies greater than 2.1±0.2 times the band gap, an average of more than 1 exciton per photoexcited nanoparticle was found even in the limit of vanishing fluence. The average number of excitons generated by an absorbed photon was measured to be 1.18±0.03 for excitation photons with energies 2.6 times the band gap. © 2010 The American Physical Society.

Original language	English
Article number	081303
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevB.81.081303
Publication status	Published - 16 Feb 2010

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title = "Efficient carrier multiplication in InP nanoparticles",

abstract = "Efficient carrier multiplication in InP nanoparticles is reported; ultrafast transient absorption measurements at the band edge were used to determine the number of excitons per photoexcited nanoparticle for a range of both excitation fluences and photon energies. At photon energies greater than 2.1±0.2 times the band gap, an average of more than 1 exciton per photoexcited nanoparticle was found even in the limit of vanishing fluence. The average number of excitons generated by an absorbed photon was measured to be 1.18±0.03 for excitation photons with energies 2.6 times the band gap. {\textcopyright} 2010 The American Physical Society.",

author = "Stubbs, {Stuart K.} and Samantha Hardman and Darren Graham and Ben Spencer and Wendy Flavell and Paul Glarvey and Ombretta Masala and Pickett, {Nigel L.} and David Binks",

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doi = "10.1103/PhysRevB.81.081303",

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AU - Stubbs, Stuart K.

AU - Hardman, Samantha

AU - Graham, Darren

AU - Spencer, Ben

AU - Flavell, Wendy

AU - Glarvey, Paul

AU - Masala, Ombretta

AU - Pickett, Nigel L.

AU - Binks, David

PY - 2010/2/16

Y1 - 2010/2/16

N2 - Efficient carrier multiplication in InP nanoparticles is reported; ultrafast transient absorption measurements at the band edge were used to determine the number of excitons per photoexcited nanoparticle for a range of both excitation fluences and photon energies. At photon energies greater than 2.1±0.2 times the band gap, an average of more than 1 exciton per photoexcited nanoparticle was found even in the limit of vanishing fluence. The average number of excitons generated by an absorbed photon was measured to be 1.18±0.03 for excitation photons with energies 2.6 times the band gap. © 2010 The American Physical Society.

AB - Efficient carrier multiplication in InP nanoparticles is reported; ultrafast transient absorption measurements at the band edge were used to determine the number of excitons per photoexcited nanoparticle for a range of both excitation fluences and photon energies. At photon energies greater than 2.1±0.2 times the band gap, an average of more than 1 exciton per photoexcited nanoparticle was found even in the limit of vanishing fluence. The average number of excitons generated by an absorbed photon was measured to be 1.18±0.03 for excitation photons with energies 2.6 times the band gap. © 2010 The American Physical Society.

U2 - 10.1103/PhysRevB.81.081303

DO - 10.1103/PhysRevB.81.081303

M3 - Article

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VL - 81

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 8

M1 - 081303

ER -

Efficient carrier multiplication in InP nanoparticles

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Communicating Physics through the Royal Society

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Efficient carrier multiplication in InP nanoparticles

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