Anisotropy of transient photoconductivity in functionalized pentacene single crystals

O. Ostroverkhova; D. G. Cooke; F. A. Hegmann; R. R. Tykwinski; S. R. Parkin; J. E. Anthony

doi:10.1063/1.2387135

Anisotropy of transient photoconductivity in functionalized pentacene single crystals

O. Ostroverkhova, D. G. Cooke, F. A. Hegmann, R. R. Tykwinski, S. R. Parkin, J. E. Anthony

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

85 Scopus citations

Abstract

We report on the anisotropy of transient photoconductivity in functionalized pentacene single crystals using ultrafast optical pump-terahertz probe techniques. Functionalized pentacene crystals with tri- isopropylsilylethynyl (TIPS) and tri-ethylsilylethynyl (TES) side groups were studied, characterized by crystal structures favoring two-dimensional and one-dimensional charge transports, respectively. Charge carrier mobility anisotropies in the a-b plane of 3.5±0.6 and 12±6 were obtained in the TIPS and TES crystals, respectively, consistent with the degree of π overlap along different directions in the crystals. A photogeneration efficiency anisotropy was also observed in both types of crystals.

Original language	English
Article number	192113
Journal	Applied Physics Letters
Volume	89
Issue number	19
DOIs	https://doi.org/10.1063/1.2387135
State	Published - 2006

Bibliographical note

Funding Information:
The authors thank V. Podzorov for helpful discussions. This work was supported by NSERC, CIPI, ONR, iCORE, and the Killam Trust.

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2387135

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title = "Anisotropy of transient photoconductivity in functionalized pentacene single crystals",

abstract = "We report on the anisotropy of transient photoconductivity in functionalized pentacene single crystals using ultrafast optical pump-terahertz probe techniques. Functionalized pentacene crystals with tri- isopropylsilylethynyl (TIPS) and tri-ethylsilylethynyl (TES) side groups were studied, characterized by crystal structures favoring two-dimensional and one-dimensional charge transports, respectively. Charge carrier mobility anisotropies in the a-b plane of 3.5±0.6 and 12±6 were obtained in the TIPS and TES crystals, respectively, consistent with the degree of π overlap along different directions in the crystals. A photogeneration efficiency anisotropy was also observed in both types of crystals.",

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note = "Funding Information: The authors thank V. Podzorov for helpful discussions. This work was supported by NSERC, CIPI, ONR, iCORE, and the Killam Trust.",

year = "2006",

doi = "10.1063/1.2387135",

language = "English",

volume = "89",

number = "19",

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T1 - Anisotropy of transient photoconductivity in functionalized pentacene single crystals

AU - Ostroverkhova, O.

AU - Cooke, D. G.

AU - Hegmann, F. A.

AU - Tykwinski, R. R.

AU - Parkin, S. R.

AU - Anthony, J. E.

N1 - Funding Information: The authors thank V. Podzorov for helpful discussions. This work was supported by NSERC, CIPI, ONR, iCORE, and the Killam Trust.

PY - 2006

Y1 - 2006

N2 - We report on the anisotropy of transient photoconductivity in functionalized pentacene single crystals using ultrafast optical pump-terahertz probe techniques. Functionalized pentacene crystals with tri- isopropylsilylethynyl (TIPS) and tri-ethylsilylethynyl (TES) side groups were studied, characterized by crystal structures favoring two-dimensional and one-dimensional charge transports, respectively. Charge carrier mobility anisotropies in the a-b plane of 3.5±0.6 and 12±6 were obtained in the TIPS and TES crystals, respectively, consistent with the degree of π overlap along different directions in the crystals. A photogeneration efficiency anisotropy was also observed in both types of crystals.

AB - We report on the anisotropy of transient photoconductivity in functionalized pentacene single crystals using ultrafast optical pump-terahertz probe techniques. Functionalized pentacene crystals with tri- isopropylsilylethynyl (TIPS) and tri-ethylsilylethynyl (TES) side groups were studied, characterized by crystal structures favoring two-dimensional and one-dimensional charge transports, respectively. Charge carrier mobility anisotropies in the a-b plane of 3.5±0.6 and 12±6 were obtained in the TIPS and TES crystals, respectively, consistent with the degree of π overlap along different directions in the crystals. A photogeneration efficiency anisotropy was also observed in both types of crystals.

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VL - 89

JO - Applied Physics Letters

JF - Applied Physics Letters

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M1 - 192113

ER -

Anisotropy of transient photoconductivity in functionalized pentacene single crystals

Abstract

Bibliographical note

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