TOF mobility measurements in pristine films of P3HT: Control of hole injection and influence of film thickness

Amy M. Ballantyne; Joanne S. Wilson; Jenny Nelson; Donal D.C. Bradley; James R. Durrant; Martin Heeney; Warren Duffy; Iain McCulloch

doi:10.1117/12.680655

TOF mobility measurements in pristine films of P3HT: Control of hole injection and influence of film thickness

Amy M. Ballantyne^*, Joanne S. Wilson, Jenny Nelson, Donal D.C. Bradley, James R. Durrant, Martin Heeney, Warren Duffy, Iain McCulloch

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

15 Scopus citations

Abstract

Time-of-flight (TOF) photocurrent measurements have been used to study charge transport in films of regioregular poly(3-hexylthiophene) (P3HT). Devices in which the P3HT film had been deposited directly onto an indium tin oxide (ITO) electrode produced high dark currents as a result of hole injection into P3HT from ITO. Photocurrent transients in such devices were disperse. It was found however, that these dark currents could be significantly reduced by inserting a dense TiO2 layer between the ITO and the polymer film. The resulting devices gave non-dispersive transients with hole and electron mobilities in the range of 1 - 2 10^-4 cm² V^-1 s^-1 at room temperature. The mobility values were observed to be almost independent of film thickness over the range of 350 nm to 4.3 μm. Temperature dependence studies showed a weak dependence on temperature with a low energetic disorder parameter according to analysis using the Gaussian Disorder Model (GDM) of 71 meV.

Original language	English (US)
Title of host publication	Organic Photovoltaics VII
DOIs	https://doi.org/10.1117/12.680655
State	Published - 2006
Externally published	Yes
Event	Organic Photovoltaics VII - San Diego, CA, United States Duration: Aug 15 2006 → Aug 17 2006

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	6334
ISSN (Print)	0277-786X

Other

Other	Organic Photovoltaics VII
Country/Territory	United States
City	San Diego, CA
Period	08/15/06 → 08/17/06

Keywords

Charge mobility
Poly(3-hexylthiophene)
Time-of-flight

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.680655

Cite this

Ballantyne, A. M., Wilson, J. S., Nelson, J., Bradley, D. D. C., Durrant, J. R., Heeney, M., Duffy, W., & McCulloch, I. (2006). TOF mobility measurements in pristine films of P3HT: Control of hole injection and influence of film thickness. In Organic Photovoltaics VII Article 633408 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6334). https://doi.org/10.1117/12.680655

@inproceedings{fcae28e07d44453380fcf81dff077152,

title = "TOF mobility measurements in pristine films of P3HT: Control of hole injection and influence of film thickness",

abstract = "Time-of-flight (TOF) photocurrent measurements have been used to study charge transport in films of regioregular poly(3-hexylthiophene) (P3HT). Devices in which the P3HT film had been deposited directly onto an indium tin oxide (ITO) electrode produced high dark currents as a result of hole injection into P3HT from ITO. Photocurrent transients in such devices were disperse. It was found however, that these dark currents could be significantly reduced by inserting a dense TiO2 layer between the ITO and the polymer film. The resulting devices gave non-dispersive transients with hole and electron mobilities in the range of 1 - 2 10-4 cm2 V-1 s-1 at room temperature. The mobility values were observed to be almost independent of film thickness over the range of 350 nm to 4.3 μm. Temperature dependence studies showed a weak dependence on temperature with a low energetic disorder parameter according to analysis using the Gaussian Disorder Model (GDM) of 71 meV.",

keywords = "Charge mobility, Poly(3-hexylthiophene), Time-of-flight",

author = "Ballantyne, {Amy M.} and Wilson, {Joanne S.} and Jenny Nelson and Bradley, {Donal D.C.} and Durrant, {James R.} and Martin Heeney and Warren Duffy and Iain McCulloch",

year = "2006",

doi = "10.1117/12.680655",

language = "English (US)",

isbn = "0819464139",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

booktitle = "Organic Photovoltaics VII",

note = "Organic Photovoltaics VII ; Conference date: 15-08-2006 Through 17-08-2006",

}

Ballantyne, AM, Wilson, JS, Nelson, J, Bradley, DDC, Durrant, JR, Heeney, M, Duffy, W & McCulloch, I 2006, TOF mobility measurements in pristine films of P3HT: Control of hole injection and influence of film thickness. in Organic Photovoltaics VII., 633408, Proceedings of SPIE - The International Society for Optical Engineering, vol. 6334, Organic Photovoltaics VII, San Diego, CA, United States, 08/15/06. https://doi.org/10.1117/12.680655

TOF mobility measurements in pristine films of P3HT: Control of hole injection and influence of film thickness. / Ballantyne, Amy M.; Wilson, Joanne S.; Nelson, Jenny et al.
Organic Photovoltaics VII. 2006. 633408 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6334).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - TOF mobility measurements in pristine films of P3HT

T2 - Organic Photovoltaics VII

AU - Ballantyne, Amy M.

AU - Wilson, Joanne S.

AU - Nelson, Jenny

AU - Bradley, Donal D.C.

AU - Durrant, James R.

AU - Heeney, Martin

AU - Duffy, Warren

AU - McCulloch, Iain

PY - 2006

Y1 - 2006

N2 - Time-of-flight (TOF) photocurrent measurements have been used to study charge transport in films of regioregular poly(3-hexylthiophene) (P3HT). Devices in which the P3HT film had been deposited directly onto an indium tin oxide (ITO) electrode produced high dark currents as a result of hole injection into P3HT from ITO. Photocurrent transients in such devices were disperse. It was found however, that these dark currents could be significantly reduced by inserting a dense TiO2 layer between the ITO and the polymer film. The resulting devices gave non-dispersive transients with hole and electron mobilities in the range of 1 - 2 10-4 cm2 V-1 s-1 at room temperature. The mobility values were observed to be almost independent of film thickness over the range of 350 nm to 4.3 μm. Temperature dependence studies showed a weak dependence on temperature with a low energetic disorder parameter according to analysis using the Gaussian Disorder Model (GDM) of 71 meV.

AB - Time-of-flight (TOF) photocurrent measurements have been used to study charge transport in films of regioregular poly(3-hexylthiophene) (P3HT). Devices in which the P3HT film had been deposited directly onto an indium tin oxide (ITO) electrode produced high dark currents as a result of hole injection into P3HT from ITO. Photocurrent transients in such devices were disperse. It was found however, that these dark currents could be significantly reduced by inserting a dense TiO2 layer between the ITO and the polymer film. The resulting devices gave non-dispersive transients with hole and electron mobilities in the range of 1 - 2 10-4 cm2 V-1 s-1 at room temperature. The mobility values were observed to be almost independent of film thickness over the range of 350 nm to 4.3 μm. Temperature dependence studies showed a weak dependence on temperature with a low energetic disorder parameter according to analysis using the Gaussian Disorder Model (GDM) of 71 meV.

KW - Charge mobility

KW - Poly(3-hexylthiophene)

KW - Time-of-flight

UR - http://www.scopus.com/inward/record.url?scp=33846207921&partnerID=8YFLogxK

U2 - 10.1117/12.680655

DO - 10.1117/12.680655

M3 - Conference contribution

AN - SCOPUS:33846207921

SN - 0819464139

SN - 9780819464132

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Organic Photovoltaics VII

Y2 - 15 August 2006 through 17 August 2006

ER -

TOF mobility measurements in pristine films of P3HT: Control of hole injection and influence of film thickness

Abstract

Publication series

Other

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this