Physical Sciences and Mathematics Commons^™

Temperature Dependent C-Axis Hole Mobilities In Rubrene Single Crystals Determined By Time-Of-Flight, Russell L. Lidberg, Tom J. Pundsack, Neale O. Haugen, Lucas R. Johnstone, C. Daniel Frisbie

Physics and Astronomy Faculty Publications

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 …