Temperature dependent c-axis hole mobilities in rubrene single crystals determined by time-of-flight

Tom J. Pundsack; Neale O. Haugen; Lucas R. Johnstone; C. Daniel Frisbie; Russell L. Lidberg

doi:10.1063/1.4914975

Temperature dependent c-axis hole mobilities in rubrene single crystals determined by time-of-flight

Tom J. Pundsack, Neale O. Haugen, Lucas R. Johnstone, C. Daniel Frisbie, Russell L. Lidberg

Chemical Engineering and Materials Science

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

13 Scopus citations

Abstract

Hole mobilities (μ) in rubrene single crystals (space group Cmca) along the crystallographic c-axis have been investigated as a function of temperature and applied electric field by the time-of-fight method. Measurements demonstrate an inverse power law dependence on temperature, namely, μ=μ₀T^-n with n = 1.8, from room temperature down to 180 K. At 296 K, the average value of μ was found to be 0.29 cm²/Vs increasing to an average value of 0.70 cm²/Vs at 180 K. Below 180 K a decrease in mobility is observed with further cooling. Overall, these results confirm the anisotropic nature of transport in rubrene crystals as well as the generality of the inverse power law temperature dependence that is observed for field effect mobility measurements in the a-b crystal plane.

Original language	English (US)
Article number	113301
Journal	Applied Physics Letters
Volume	106
Issue number	11
DOIs	https://doi.org/10.1063/1.4914975
State	Published - Mar 16 2015

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abstract = "Hole mobilities (μ) in rubrene single crystals (space group Cmca) along the crystallographic c-axis have been investigated as a function of temperature and applied electric field by the time-of-fight method. Measurements demonstrate an inverse power law dependence on temperature, namely, μ=μ0T-n with n = 1.8, from room temperature down to 180 K. At 296 K, the average value of μ was found to be 0.29 cm2/Vs increasing to an average value of 0.70 cm2/Vs at 180 K. Below 180 K a decrease in mobility is observed with further cooling. Overall, these results confirm the anisotropic nature of transport in rubrene crystals as well as the generality of the inverse power law temperature dependence that is observed for field effect mobility measurements in the a-b crystal plane.",

author = "Pundsack, {Tom J.} and Haugen, {Neale O.} and Johnstone, {Lucas R.} and {Daniel Frisbie}, C. and Lidberg, {Russell L.}",

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AU - Pundsack, Tom J.

AU - Haugen, Neale O.

AU - Johnstone, Lucas R.

AU - Daniel Frisbie, C.

AU - Lidberg, Russell L.

PY - 2015/3/16

Y1 - 2015/3/16

N2 - Hole mobilities (μ) in rubrene single crystals (space group Cmca) along the crystallographic c-axis have been investigated as a function of temperature and applied electric field by the time-of-fight method. Measurements demonstrate an inverse power law dependence on temperature, namely, μ=μ0T-n with n = 1.8, from room temperature down to 180 K. At 296 K, the average value of μ was found to be 0.29 cm2/Vs increasing to an average value of 0.70 cm2/Vs at 180 K. Below 180 K a decrease in mobility is observed with further cooling. Overall, these results confirm the anisotropic nature of transport in rubrene crystals as well as the generality of the inverse power law temperature dependence that is observed for field effect mobility measurements in the a-b crystal plane.

AB - Hole mobilities (μ) in rubrene single crystals (space group Cmca) along the crystallographic c-axis have been investigated as a function of temperature and applied electric field by the time-of-fight method. Measurements demonstrate an inverse power law dependence on temperature, namely, μ=μ0T-n with n = 1.8, from room temperature down to 180 K. At 296 K, the average value of μ was found to be 0.29 cm2/Vs increasing to an average value of 0.70 cm2/Vs at 180 K. Below 180 K a decrease in mobility is observed with further cooling. Overall, these results confirm the anisotropic nature of transport in rubrene crystals as well as the generality of the inverse power law temperature dependence that is observed for field effect mobility measurements in the a-b crystal plane.

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Temperature dependent c-axis hole mobilities in rubrene single crystals determined by time-of-flight

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