Electron drift mobility in 2-methyltetrahydrofuran organic glass

The electron drift mobility in 2-methyltetrahydrofuran glass has been measured by a time-of-flight method from 4.2 to 77 K and is 0.055 cm2 V−1·sec−1 at 77 K. The mobility is field independent from 16 to 40 kV cm−1. The mobility is approximately temperature independent from 4.2 to 36 K and increases exponentially with temperature above 36 K with an activation energy of ≈0.0035 eV. The Debye temperature of this matrix appears to be ≈35 K. Below 35 K incoherent hopping transport is postulated which is little affected by acoustical phonon modes. Above 35 K small polaron, hopping transport is postulated which is aided by excitation of optical phonon modes. The electron mobility in this organic glass is discussed with respect to electron mobilities in organic liquids and in aqueous glasses.