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Photoconductivity in Solids
- Publisher
- American Physical Society (APS)
- Copyright
- Copyright © 2004 The American Physical Society
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.93.086602
- pmid
- 15447211
- Publisher site
- See Article on Publisher Site
Abstract
The air-gap field-effect technique enabled realization of the intrinsic (not limited by static disorder) polaronic transport on the surface of rubrene ( C 42 H 28 ) crystals over a wide temperature range. The signatures of this intrinsic transport are the anisotropy of the carrier mobility, μ , and the growth of μ with cooling. Anisotropy of μ vanishes in the activation regime at low temperatures, where the transport is dominated by shallow traps. The deep traps, introduced by x-ray radiation, increase the field-effect threshold without affecting μ , an indication that the filled traps do not scatter polarons.
Journal
Physical Review Letters – American Physical Society (APS)
Published: Aug 20, 2004