High mobilities in organic semiconductors: basic science and technology

High quality single crystals of a variety of molecular organic semiconductors have been investigated in the temperature range from 1.7 to 500K in order to study the charge transport and to reveal the intrinsic limits for electronic applications. Room temperature (RT) mobilities are typically in the...

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Bibliographic Details
Published in:Synthetic metals 2001-05, Vol.122 (1), p.157-160
Main Author: Schön, J.H.
Format: Article
Language:English
Subjects:
Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Field-effect transistor
Organic polymers
Organic semiconductors
Physicochemistry of polymers
Properties and characterization
Quantum Hall effect
Single crystals
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Summary:High quality single crystals of a variety of molecular organic semiconductors have been investigated in the temperature range from 1.7 to 500K in order to study the charge transport and to reveal the intrinsic limits for electronic applications. Room temperature (RT) mobilities are typically in the range of 1cm2/Vs increasing with decreasing temperatures. At lowest temperatures, however, electron as well as hole mobilities exceeding 103cm2/Vs can be observed. Hence, it is possible to observe the Fractional Quantum Hall effect in two-dimensional electron or hole gases in materials such as tetracene or pentacene. Moreover, we were able to transform these materials into a superconducting state below 2K by applying a high gate bias. In addition, the intrinsic performance limits of organic field-effect transistors (FETs) were investigated. Single crystal devices exhibited mobilities up to 5cm2/Vs, on/off-ratios exceeding 108, and sub-threshold slopes below 200mV per decade.
ISSN:0379-6779
1879-3290
DOI:10.1016/S0379-6779(00)01335-7