Multiple Exciton Generation and Dynamics in InP/CdS Colloidal Quantum Dots

Charles Smith; Marina Leontiadou; Pip Clark; Claire Lydon; Nicky Savjani; Ben Spencer; Wendy Flavell; Paul O'Brien; David Binks

doi:10.1021/acs.jpcc.6b11744

Multiple Exciton Generation and Dynamics in InP/CdS Colloidal Quantum Dots

Charles Smith, Marina Leontiadou, Pip Clark, Claire Lydon, Nicky Savjani, Ben Spencer, Wendy Flavell, Paul O'Brien, David Binks

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Abstract

We report measurements of multiple exciton generation and recombination in InP/CdS (core/shell) colloidal quantum dots. Ultrafast transient absorption spectroscopy was used to measure the sub-nanosecond charge dynamics for a range of pump fluences and for different pump photon energies. Analysis of the resulting transients was used to determine the quantum yield of multiple exciton generation, which was found to be 1.22 ± 0.01 for a pump photon energy equivalent to three times the band gap.

Original language	English
Journal	Journal of Physical Chemistry C
Volume	121
Issue number	4
Early online date	6 Jan 2017
DOIs	https://doi.org/10.1021/acs.jpcc.6b11744
Publication status	Published - 2017

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10.1021/acs.jpcc.6b11744

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1 Chapter

Charge Dynamics in Colloidal Quantum Dots: Recombination, Trapping and Multiple Exciton Generation
Leontiadou, M., Smith, C., Lydon, C. & Binks, D., 2018, Nanostructured Materials for Type III Photovoltaics. Skabara, P. & Malik, M. A. (eds.). Cambridge: Royal Society of Chemistry, p. 472-507 (Nanoscience and Nanotechnology).
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title = "Multiple Exciton Generation and Dynamics in InP/CdS Colloidal Quantum Dots",

abstract = "We report measurements of multiple exciton generation and recombination in InP/CdS (core/shell) colloidal quantum dots. Ultrafast transient absorption spectroscopy was used to measure the sub-nanosecond charge dynamics for a range of pump fluences and for different pump photon energies. Analysis of the resulting transients was used to determine the quantum yield of multiple exciton generation, which was found to be 1.22 ± 0.01 for a pump photon energy equivalent to three times the band gap.",

author = "Charles Smith and Marina Leontiadou and Pip Clark and Claire Lydon and Nicky Savjani and Ben Spencer and Wendy Flavell and Paul O'Brien and David Binks",

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journal = "Journal of Physical Chemistry C",

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T1 - Multiple Exciton Generation and Dynamics in InP/CdS Colloidal Quantum Dots

AU - Smith, Charles

AU - Leontiadou, Marina

AU - Clark, Pip

AU - Lydon, Claire

AU - Savjani, Nicky

AU - Spencer, Ben

AU - Flavell, Wendy

AU - O'Brien, Paul

AU - Binks, David

PY - 2017

Y1 - 2017

N2 - We report measurements of multiple exciton generation and recombination in InP/CdS (core/shell) colloidal quantum dots. Ultrafast transient absorption spectroscopy was used to measure the sub-nanosecond charge dynamics for a range of pump fluences and for different pump photon energies. Analysis of the resulting transients was used to determine the quantum yield of multiple exciton generation, which was found to be 1.22 ± 0.01 for a pump photon energy equivalent to three times the band gap.

AB - We report measurements of multiple exciton generation and recombination in InP/CdS (core/shell) colloidal quantum dots. Ultrafast transient absorption spectroscopy was used to measure the sub-nanosecond charge dynamics for a range of pump fluences and for different pump photon energies. Analysis of the resulting transients was used to determine the quantum yield of multiple exciton generation, which was found to be 1.22 ± 0.01 for a pump photon energy equivalent to three times the band gap.

U2 - 10.1021/acs.jpcc.6b11744

DO - 10.1021/acs.jpcc.6b11744

M3 - Article

SN - 1932-7447

VL - 121

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 4

ER -

Multiple Exciton Generation and Dynamics in InP/CdS Colloidal Quantum Dots

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Research output

Charge Dynamics in Colloidal Quantum Dots: Recombination, Trapping and Multiple Exciton Generation

Cite this