Organic Field-Effect Transistors Based on Fullerenes

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Organic Field-Effect Transistors Based on
Fullerenes

• Andreas Haldi

Special thanks to Joshua Haddock
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Outline

• Motivation
• Results
• Work Plan

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Challenge for Organic Field-Effect Transistors
(OFETs)

• Mobility in organic semiconductors is lower than
  in amorphous silicon (1 cm2/Vs).

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C60 / C70
C70
C60
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Results (transfer characteristics)
C60
C70
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Results (field-effect mobility)
µ field-effect mobility VT threshold voltage
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Results (field-effect mobility)
0.65 cm2/Vs is the highest mobility measured for
C60 at ambient pressure.
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Results (I-V characteristics)
Drain current for C70 is one order of magnitude
lower than for C60.
C60
C70
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Air exposure
pristine
air exposure1 hour
nitrogen recovery24 hours
C70
C60
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Work Plan

• C84 (11/2005)
• Encapsulation (07/2006)

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Questions?
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