Persistent photo-excited conducting states in functionalized pentacene

T. Tokumoto; J. S. Brooks; D. Graf; E. S. Choi; N. Biskup; D. L. Eaton; J. E. Anthony; S. A. Odom

doi:10.1016/j.synthmet.2005.07.179

Persistent photo-excited conducting states in functionalized pentacene

T. Tokumoto, J. S. Brooks, D. Graf, E. S. Choi, N. Biskup, D. L. Eaton, J. E. Anthony, S. A. Odom

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

5 Scopus citations

Abstract

We report a study of long-lived photo-excited states in single crystals of functionalized forms of pentacene: 6,13-bis (triisopropylsilylethynyl) pentacene, 6,13-bis (triethylsilylethynyl) pentacene, and 6,13-bis (triethylgermylethynyl) pentacene, organic semiconductors with band gaps ≈1 eV. The relaxation rates are thermally activated, as determined from time and temperature-dependent measurements of the photo-conductivity after illumination. These states can be produced in a stable population at temperatures below 150 K. Hence, after low temperature illumination, thermally stimulated current (TSC) is observed as temperature increases. Trap energies associated with these states can be estimated by analysis of the TSC signal.

Original language	English
Pages (from-to)	449-452
Number of pages	4
Journal	Synthetic Metals
Volume	152
Issue number	1-3
DOIs	https://doi.org/10.1016/j.synthmet.2005.07.179
State	Published - Sep 20 2005

Keywords

Organic semiconductors based on conjugated molecules
Photoconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.synthmet.2005.07.179

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title = "Persistent photo-excited conducting states in functionalized pentacene",

abstract = "We report a study of long-lived photo-excited states in single crystals of functionalized forms of pentacene: 6,13-bis (triisopropylsilylethynyl) pentacene, 6,13-bis (triethylsilylethynyl) pentacene, and 6,13-bis (triethylgermylethynyl) pentacene, organic semiconductors with band gaps ≈1 eV. The relaxation rates are thermally activated, as determined from time and temperature-dependent measurements of the photo-conductivity after illumination. These states can be produced in a stable population at temperatures below 150 K. Hence, after low temperature illumination, thermally stimulated current (TSC) is observed as temperature increases. Trap energies associated with these states can be estimated by analysis of the TSC signal.",

keywords = "Organic semiconductors based on conjugated molecules, Photoconductivity",

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AU - Tokumoto, T.

AU - Brooks, J. S.

AU - Graf, D.

AU - Choi, E. S.

AU - Biskup, N.

AU - Eaton, D. L.

AU - Anthony, J. E.

AU - Odom, S. A.

PY - 2005/9/20

Y1 - 2005/9/20

N2 - We report a study of long-lived photo-excited states in single crystals of functionalized forms of pentacene: 6,13-bis (triisopropylsilylethynyl) pentacene, 6,13-bis (triethylsilylethynyl) pentacene, and 6,13-bis (triethylgermylethynyl) pentacene, organic semiconductors with band gaps ≈1 eV. The relaxation rates are thermally activated, as determined from time and temperature-dependent measurements of the photo-conductivity after illumination. These states can be produced in a stable population at temperatures below 150 K. Hence, after low temperature illumination, thermally stimulated current (TSC) is observed as temperature increases. Trap energies associated with these states can be estimated by analysis of the TSC signal.

AB - We report a study of long-lived photo-excited states in single crystals of functionalized forms of pentacene: 6,13-bis (triisopropylsilylethynyl) pentacene, 6,13-bis (triethylsilylethynyl) pentacene, and 6,13-bis (triethylgermylethynyl) pentacene, organic semiconductors with band gaps ≈1 eV. The relaxation rates are thermally activated, as determined from time and temperature-dependent measurements of the photo-conductivity after illumination. These states can be produced in a stable population at temperatures below 150 K. Hence, after low temperature illumination, thermally stimulated current (TSC) is observed as temperature increases. Trap energies associated with these states can be estimated by analysis of the TSC signal.

KW - Organic semiconductors based on conjugated molecules

KW - Photoconductivity

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SN - 0379-6779

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EP - 452

JO - Synthetic Metals

JF - Synthetic Metals

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ER -

Persistent photo-excited conducting states in functionalized pentacene

Abstract

Keywords

ASJC Scopus subject areas

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