Isotropic transport in an oligothiophene derivative for single-crystal field-effect transistor applications

Colin Reese; Mark E. Roberts; Sean R. Parkin; Zhenan Bao

doi:10.1063/1.3129162

Isotropic transport in an oligothiophene derivative for single-crystal field-effect transistor applications

Colin Reese
, Mark E. Roberts
, Sean R. Parkin
, Zhenan Bao

Chemistry

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

16 Scopus citations

Abstract

Single-crystal organic semiconductors have proven invaluable tools in the exploration of charge transport in molecular materials. We employ the elastomeric, photolithographically patterned single-crystal field-effect transistor in the study of an alpha-substituted oligothiophene. The terminal units specify a symmetric layered motif, while allowing the oligothiophene cores to pack closely. Angle-resolved measurements of the field-effect mobility reflect the symmetric edge/face interactions and isotropic mobility. These measurements are supported by electronic structure calculations that show nearly equivalent intermolecular interactions along cell diagonals. These results reveal that the transport is diffusive and a minimum of fourfold symmetry is required for in-plane mobility isotropy.

Original language	English
Article number	202101
Journal	Applied Physics Letters
Volume	94
Issue number	20
DOIs	https://doi.org/10.1063/1.3129162
State	Published - 2009

Bibliographical note

Funding Information:
C.R. acknowledges support from the AFCEA graduate fellowship. M.E.R. acknowledges support from the NASA GSRP fellowship. Z.B. acknowledges the financial support from NSF-CPIMA, Sloan Research Fellowship, Air Force Office of Scientific Research, and NSF DMR Solid State Chemistry (Award No. DMR-0705687). Work was performed in part at the Stanford Nanofabrication Facility of NNIN supported by the National Science Foundation under Grant No. ECS-9731293.

Funding

C.R. acknowledges support from the AFCEA graduate fellowship. M.E.R. acknowledges support from the NASA GSRP fellowship. Z.B. acknowledges the financial support from NSF-CPIMA, Sloan Research Fellowship, Air Force Office of Scientific Research, and NSF DMR Solid State Chemistry (Award No. DMR-0705687). Work was performed in part at the Stanford Nanofabrication Facility of NNIN supported by the National Science Foundation under Grant No. ECS-9731293.

Funders
NSF DMR Solid State Chemistry
NSF-CPIMA
National Science Foundation (NSF)
National Aeronautics and Space Administration
Air Force Office of Scientific Research, United States Air Force

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3129162

Cite this

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abstract = "Single-crystal organic semiconductors have proven invaluable tools in the exploration of charge transport in molecular materials. We employ the elastomeric, photolithographically patterned single-crystal field-effect transistor in the study of an alpha-substituted oligothiophene. The terminal units specify a symmetric layered motif, while allowing the oligothiophene cores to pack closely. Angle-resolved measurements of the field-effect mobility reflect the symmetric edge/face interactions and isotropic mobility. These measurements are supported by electronic structure calculations that show nearly equivalent intermolecular interactions along cell diagonals. These results reveal that the transport is diffusive and a minimum of fourfold symmetry is required for in-plane mobility isotropy.",

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AU - Bao, Zhenan

N1 - Funding Information: C.R. acknowledges support from the AFCEA graduate fellowship. M.E.R. acknowledges support from the NASA GSRP fellowship. Z.B. acknowledges the financial support from NSF-CPIMA, Sloan Research Fellowship, Air Force Office of Scientific Research, and NSF DMR Solid State Chemistry (Award No. DMR-0705687). Work was performed in part at the Stanford Nanofabrication Facility of NNIN supported by the National Science Foundation under Grant No. ECS-9731293.

PY - 2009

Y1 - 2009

N2 - Single-crystal organic semiconductors have proven invaluable tools in the exploration of charge transport in molecular materials. We employ the elastomeric, photolithographically patterned single-crystal field-effect transistor in the study of an alpha-substituted oligothiophene. The terminal units specify a symmetric layered motif, while allowing the oligothiophene cores to pack closely. Angle-resolved measurements of the field-effect mobility reflect the symmetric edge/face interactions and isotropic mobility. These measurements are supported by electronic structure calculations that show nearly equivalent intermolecular interactions along cell diagonals. These results reveal that the transport is diffusive and a minimum of fourfold symmetry is required for in-plane mobility isotropy.

AB - Single-crystal organic semiconductors have proven invaluable tools in the exploration of charge transport in molecular materials. We employ the elastomeric, photolithographically patterned single-crystal field-effect transistor in the study of an alpha-substituted oligothiophene. The terminal units specify a symmetric layered motif, while allowing the oligothiophene cores to pack closely. Angle-resolved measurements of the field-effect mobility reflect the symmetric edge/face interactions and isotropic mobility. These measurements are supported by electronic structure calculations that show nearly equivalent intermolecular interactions along cell diagonals. These results reveal that the transport is diffusive and a minimum of fourfold symmetry is required for in-plane mobility isotropy.

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Isotropic transport in an oligothiophene derivative for single-crystal field-effect transistor applications

Abstract

Bibliographical note

Funding

ASJC Scopus subject areas

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