Photogeneration and Ultrafast Dynamics of Excitons and Charges in P3HT/PCBM Blends

Jorge Piris; Tieneke E. Dykstra; Artem A. Bakulin; Paul H. M. van Loosdrecht; Walter Knulst; M. Tuan Trinh; Juleon M. Schins; Laurens D. A. Siebbeles

doi:10.1021/jp904229q

Photogeneration and Ultrafast Dynamics of Excitons and Charges in P3HT/PCBM Blends

Jorge Piris^*, Tieneke E. Dykstra, Artem A. Bakulin, Paul H. M. van Loosdrecht, Walter Knulst, M. Tuan Trinh, Juleon M. Schins, Laurens D. A. Siebbeles

^*Corresponding author for this work

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

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Abstract

The photogeneration quantum yield and dynamics of charge carriers and excitons in thin films of neat regioregular poly(3-hexylthiophene) (P3HT) and blends with [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM) were studied with ultrafast optical pump-probe spectroscopy. In neat P3HT the quantum yield for direct photogeneration of charge carriers amounts to 0.15 per absorbed photon. The remaining fraction of absorbed photons leads to formation of excitons. Recombination of charges reduces the quantum yield to about 25% of its initial value on a time scale of 100 ps followed by decay to a no longer observable yield after Ins. Addition of 50% PCBM by weight leads to ultrafast (

Original language	English
Pages (from-to)	14500-14506
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	113
Issue number	32
DOIs	https://doi.org/10.1021/jp904229q
Publication status	Published - 13-Aug-2009

Keywords

BULK-HETEROJUNCTION
CONJUGATED POLYMERS
SOLAR-CELLS
REGIOREGULAR POLYTHIOPHENE
CARRIER GENERATION
POLY(3-HEXYLTHIOPHENE)
SPECTROSCOPY
STATES
FILMS
NANOCRYSTALS

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@article{5806300666ea47fca4281abb838650af,

title = "Photogeneration and Ultrafast Dynamics of Excitons and Charges in P3HT/PCBM Blends",

abstract = "The photogeneration quantum yield and dynamics of charge carriers and excitons in thin films of neat regioregular poly(3-hexylthiophene) (P3HT) and blends with [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM) were studied with ultrafast optical pump-probe spectroscopy. In neat P3HT the quantum yield for direct photogeneration of charge carriers amounts to 0.15 per absorbed photon. The remaining fraction of absorbed photons leads to formation of excitons. Recombination of charges reduces the quantum yield to about 25% of its initial value on a time scale of 100 ps followed by decay to a no longer observable yield after Ins. Addition of 50% PCBM by weight leads to ultrafast (",

keywords = "BULK-HETEROJUNCTION, CONJUGATED POLYMERS, SOLAR-CELLS, REGIOREGULAR POLYTHIOPHENE, CARRIER GENERATION, POLY(3-HEXYLTHIOPHENE), SPECTROSCOPY, STATES, FILMS, NANOCRYSTALS",

author = "Jorge Piris and Dykstra, {Tieneke E.} and Bakulin, {Artem A.} and {van Loosdrecht}, {Paul H. M.} and Walter Knulst and Trinh, {M. Tuan} and Schins, {Juleon M.} and Siebbeles, {Laurens D. A.}",

year = "2009",

month = aug,

day = "13",

doi = "10.1021/jp904229q",

language = "English",

volume = "113",

pages = "14500--14506",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "AMER CHEMICAL SOC",

number = "32",

}

TY - JOUR

T1 - Photogeneration and Ultrafast Dynamics of Excitons and Charges in P3HT/PCBM Blends

AU - Piris, Jorge

AU - Dykstra, Tieneke E.

AU - Bakulin, Artem A.

AU - van Loosdrecht, Paul H. M.

AU - Knulst, Walter

AU - Trinh, M. Tuan

AU - Schins, Juleon M.

AU - Siebbeles, Laurens D. A.

PY - 2009/8/13

Y1 - 2009/8/13

N2 - The photogeneration quantum yield and dynamics of charge carriers and excitons in thin films of neat regioregular poly(3-hexylthiophene) (P3HT) and blends with [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM) were studied with ultrafast optical pump-probe spectroscopy. In neat P3HT the quantum yield for direct photogeneration of charge carriers amounts to 0.15 per absorbed photon. The remaining fraction of absorbed photons leads to formation of excitons. Recombination of charges reduces the quantum yield to about 25% of its initial value on a time scale of 100 ps followed by decay to a no longer observable yield after Ins. Addition of 50% PCBM by weight leads to ultrafast (

AB - The photogeneration quantum yield and dynamics of charge carriers and excitons in thin films of neat regioregular poly(3-hexylthiophene) (P3HT) and blends with [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM) were studied with ultrafast optical pump-probe spectroscopy. In neat P3HT the quantum yield for direct photogeneration of charge carriers amounts to 0.15 per absorbed photon. The remaining fraction of absorbed photons leads to formation of excitons. Recombination of charges reduces the quantum yield to about 25% of its initial value on a time scale of 100 ps followed by decay to a no longer observable yield after Ins. Addition of 50% PCBM by weight leads to ultrafast (

KW - BULK-HETEROJUNCTION

KW - CONJUGATED POLYMERS

KW - SOLAR-CELLS

KW - REGIOREGULAR POLYTHIOPHENE

KW - CARRIER GENERATION

KW - POLY(3-HEXYLTHIOPHENE)

KW - SPECTROSCOPY

KW - STATES

KW - FILMS

KW - NANOCRYSTALS

U2 - 10.1021/jp904229q

DO - 10.1021/jp904229q

M3 - Article

SN - 1932-7447

VL - 113

SP - 14500

EP - 14506

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 32

ER -

Photogeneration and Ultrafast Dynamics of Excitons and Charges in P3HT/PCBM Blends

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Keywords

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