Unified Study of Recombination in Polymer:Fullerene Solar Cells Using Transient Absorption and Charge-Extraction Measurements

Mattias Andersson; Armantas Melianas; Yingyot Infahsaeng; Zheng Tang; Arkady Yartsev; Olle Inganas; Villy Sundström

doi:10.1021/jz4009745

Unified Study of Recombination in Polymer:Fullerene Solar Cells Using Transient Absorption and Charge-Extraction Measurements

Mattias Andersson, Armantas Melianas, Yingyot Infahsaeng, Zheng Tang, Arkady Yartsev, Olle Inganas, Villy Sundström

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

Abstract

Recombination in the well-performing bulk heterojunction solar cell blend between the conjugated polymer TQ-1 and the substituted fullerene PCBM has been investigated with pump-probe transient absorption and charge extraction of photo-generated carriers (photo-CELIV). Both methods are shown to generate identical and overlapping data under appropriate experimental conditions. The dominant type of recombination is bimolecular with a rate constant of 7 x 10(-12) cm(-3) s(-1). This recombination rate is shown to be fully consistent with solar cell performance. Deviations from an ideal bimolecular recombination process, in this material system only observable at high pump fluences, are explained with a time-dependent charge-carrier mobility, and the implications of such a behavior for device development are discussed.

Original language	English
Pages (from-to)	2069-2072
Journal	The Journal of Physical Chemistry Letters
Volume	4
Issue number	12
DOIs	https://doi.org/10.1021/jz4009745
Publication status	Published - 2013

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Chemical Physics (S) (011001060)

Subject classification (UKÄ)

Atom and Molecular Physics and Optics

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10.1021/jz4009745

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title = "Unified Study of Recombination in Polymer:Fullerene Solar Cells Using Transient Absorption and Charge-Extraction Measurements",

abstract = "Recombination in the well-performing bulk heterojunction solar cell blend between the conjugated polymer TQ-1 and the substituted fullerene PCBM has been investigated with pump-probe transient absorption and charge extraction of photo-generated carriers (photo-CELIV). Both methods are shown to generate identical and overlapping data under appropriate experimental conditions. The dominant type of recombination is bimolecular with a rate constant of 7 x 10(-12) cm(-3) s(-1). This recombination rate is shown to be fully consistent with solar cell performance. Deviations from an ideal bimolecular recombination process, in this material system only observable at high pump fluences, are explained with a time-dependent charge-carrier mobility, and the implications of such a behavior for device development are discussed.",

author = "Mattias Andersson and Armantas Melianas and Yingyot Infahsaeng and Zheng Tang and Arkady Yartsev and Olle Inganas and Villy Sundstr{\"o}m",

note = "The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)",

year = "2013",

doi = "10.1021/jz4009745",

language = "English",

volume = "4",

pages = "2069--2072",

journal = "The Journal of Physical Chemistry Letters",

issn = "1948-7185",

publisher = "The American Chemical Society (ACS)",

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TY - JOUR

T1 - Unified Study of Recombination in Polymer:Fullerene Solar Cells Using Transient Absorption and Charge-Extraction Measurements

AU - Andersson, Mattias

AU - Melianas, Armantas

AU - Infahsaeng, Yingyot

AU - Tang, Zheng

AU - Yartsev, Arkady

AU - Inganas, Olle

AU - Sundström, Villy

N1 - The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)

PY - 2013

Y1 - 2013

N2 - Recombination in the well-performing bulk heterojunction solar cell blend between the conjugated polymer TQ-1 and the substituted fullerene PCBM has been investigated with pump-probe transient absorption and charge extraction of photo-generated carriers (photo-CELIV). Both methods are shown to generate identical and overlapping data under appropriate experimental conditions. The dominant type of recombination is bimolecular with a rate constant of 7 x 10(-12) cm(-3) s(-1). This recombination rate is shown to be fully consistent with solar cell performance. Deviations from an ideal bimolecular recombination process, in this material system only observable at high pump fluences, are explained with a time-dependent charge-carrier mobility, and the implications of such a behavior for device development are discussed.

AB - Recombination in the well-performing bulk heterojunction solar cell blend between the conjugated polymer TQ-1 and the substituted fullerene PCBM has been investigated with pump-probe transient absorption and charge extraction of photo-generated carriers (photo-CELIV). Both methods are shown to generate identical and overlapping data under appropriate experimental conditions. The dominant type of recombination is bimolecular with a rate constant of 7 x 10(-12) cm(-3) s(-1). This recombination rate is shown to be fully consistent with solar cell performance. Deviations from an ideal bimolecular recombination process, in this material system only observable at high pump fluences, are explained with a time-dependent charge-carrier mobility, and the implications of such a behavior for device development are discussed.

U2 - 10.1021/jz4009745

DO - 10.1021/jz4009745

M3 - Article

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JO - The Journal of Physical Chemistry Letters

JF - The Journal of Physical Chemistry Letters

IS - 12

ER -

Unified Study of Recombination in Polymer:Fullerene Solar Cells Using Transient Absorption and Charge-Extraction Measurements

Abstract

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