Charge transport in the glassy state of a variety of low molecular-weight organic compounds has ben studied. The hole drift mobility of the molecular glass was found to be of the order of 10^-6 approximately 10^-2 cm²V^-1s^-1 at an electric field of 1.0 by 10⁵ Vcm^-1 at room temperature, being higher than those of polymers and molecularly-doped polymer systems. The electric-field and temperature dependencies of charge- carrier drift mobility were analyzed in terms of the disorder formalism. The negative electric-field dependence of charge-carrier drift mobility was observed for the first time for the molecular glass. The relationship between molecular structure and charge-transport properties is discussed.

Date Published: 16 December 1998
PDF: 10 pages
Proc. SPIE 3476, Organic Light-Emitting Materials and Devices II, (16 December 1998); doi: 10.1117/12.332606

Published in SPIE Proceedings Vol. 3476:
Organic Light-Emitting Materials and Devices II
Zakya H. Kafafi, Editor(s)