We observe bandlike transport in pentacene and functionalized pentacene thin films using time-resolved terahertz pulse spectroscopy. The measured transient photoconductivity exhibits fast (<400 fs) photogeneration of mobile charge carriers and reveals a transient carrier mobility that increases as the temperature decreases from 300 K down to 10 K, indicative of bandlike transport over subpicosecond time scales. A wavelength-independent photoconductive signal is observed. The transient photoconductivity in the thin-film samples exhibits a single-exponential decay, whereas a power-law decay is seen in single-crystal samples.
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Univ Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, NetherlandsUniv Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, Netherlands
Jurchescu, OD
;
Baas, J
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Univ Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, NetherlandsUniv Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, Netherlands
Baas, J
;
Palstra, TTM
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Univ Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, NetherlandsUniv Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, Netherlands
机构:
Univ Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, NetherlandsUniv Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, Netherlands
Jurchescu, OD
;
Baas, J
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机构:
Univ Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, NetherlandsUniv Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, Netherlands
Baas, J
;
Palstra, TTM
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h-index: 0
机构:
Univ Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, NetherlandsUniv Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, Netherlands