Two-dimensional deformation potential model of mobility in small molecule organic semiconductors
Abstract
An acoustic deformation potential model appropriate for transport in two dimensions is employed to estimate upper limits on the intrinsic hole mobility of DNTT-C10 [2,9-dialkyl-dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene] and BTBT-C12 [2,7-dialkyl[1]benzo-thieno[3,2-b][1]benzothiophene]. First-principles calculations are employed to determine the values of effective masses, deformation potentials, and elastic constants entering the model. The analysis suggests that the upper limit on room temperature mobility within a single crystalline region in DNTT-C10 or BTBT-C12 may be some tens of cm2/Vs. The width of the π-bonded molecular core in the direction perpendicular to the transport plane is identified as a structural feature affecting mobility in two-dimensional organic semiconductors.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 08, 2011
- Source ID
- 10.1063/1.3624588
Entities
People
- J. E. Northrup
Organizations
- Air Force Office of Scientific Research
- PARC