Temperature-dependent hole mobility in pyrene–thiophene-based room-temperature discotic liquid crystals

Abstract

π-Conjugated pyrene–thiophene-based room-temperature discotic liquid crystals armed with four peripheral aliphatic chains are reported to study their potential use in a hole-transporting organic semiconductor. The charge carrier mobility studies using the ToF method revealed room temperature hole mobility in the order of 10⁻⁴ cm² V⁻¹ s⁻¹ for both mesogens. However, the mobility values for compound 1a were observed in the order of 10⁻³ cm² V⁻¹ s⁻¹ at high temperatures. Such molecular systems can potentially be used in nonlinear organic electronic applications.