High hole mobility in room temperature discotic liquid crystalline tetrathienoanthracenes

Tetrathienoanthracene (TTA), a new discotic core fragment, is explored that shows a remarkably high hole mobility ( μ h ) of 4.22 cm 2 V −1 s −1 at room temperature when used in space-charge limited current (SCLC) devices. Strong co-facial interactions (π-π, S S) among TTA cores along with a high tendency of the derivative to align homeotropically in the columnar mesophase over a large area in SCLC cells contributed to the top-class charge carrier mobility. Tetrathienoanthracene (TTA), a new discotic core fragment, is explored that shows a remarkably high hole mobility ( μ h ) of 4.22 cm 2 V −1 s −1 at room temperature when used in space-charge limited current (SCLC) devices.