The observation of the intrinsic transport of field-induced charges on the surface of single crystals of rubrene (C42H28 was reported. It was shown than the air-gap field-effect technique enabled realization of the intrinsic polaronic transport on the surface of rubrene crystals over a wide range of temperatures. The observation of two signatures of the intrinsic transport - the mobility increases with decreasing temperature and the mobility anisotropy, in the temperature range ∼150-300 K, was presented. It was found that at lower temperatures, where the charge transport was dominated by shallow traps, μ decreases exponentially with cooling and its anisotropy vanishes.
ASJC Scopus subject areas
- Physics and Astronomy(all)