Amorphous-like Density of Gap States in Single Crystal Pentacene

Preprint

31 December 2003

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0312722

Abstract

We show that optical and electrical measurements on pentacene single crystals can be used to extract the density of states in the HOMO-LUMO bandgap. It is found that these highly purified crystals possess band tails broader than those typically observed in inorganic amorphous solids. Results on field effect transistors (FETs) fabricated from similar crystals are also compared. The FET data imply that the gap state density is much larger within 5-10 nm of the gate dielectric. These results are discussed in terms of both crystal phase domains and structural disorder mechanisms.

Keywords

PENTACENE SINGLE CRYSTALS
FIELD EFFECT TRANSISTORS
DOMAINS AND STRUCTURAL
SINGLE CRYSTALS
STATE DENSITY
GAP STATES
INORGANIC
FETS

All Related Versions

Version 1, 2003-12-31, ArXiv
Published version: Physical Review Letters, 93 (8), 086802.

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