Two-dimensional quasi-freestanding molecular crystals for high-performance organic field-effect transistors
Two-dimensional atomic crystals are extensively studied in recent years due to their exciting physics and device applications. However, a molecular counterpart, with scalable processability and competitive device performance, is still challenging. Here, we demonstrate that high-quality few-layer dio...
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Veröffentlicht in: | Nature communications 2014-10, Vol.5 (1), p.5162-5162, Article 5162 |
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Sprache: | eng |
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Zusammenfassung: | Two-dimensional atomic crystals are extensively studied in recent years due to their exciting physics and device applications. However, a molecular counterpart, with scalable processability and competitive device performance, is still challenging. Here, we demonstrate that high-quality few-layer dioctylbenzothienobenzothiophene molecular crystals can be grown on graphene or boron nitride substrate via van der Waals epitaxy, with precisely controlled thickness down to monolayer, large-area single crystal, low process temperature and patterning capability. The crystalline layers are atomically smooth and effectively decoupled from the substrate due to weak van der Waals interactions, affording a pristine interface for high-performance organic transistors. As a result, monolayer dioctylbenzothienobenzothiophene molecular crystal field-effect transistors on boron nitride show record-high carrier mobility up to 10 cm
2
V
−1
s
−1
and aggressively scaled saturation voltage ~1 V. Our work unveils an exciting new class of two-dimensional molecular materials for electronic and optoelectronic applications.
Inorganic two-dimensional atomic crystals exhibit a variety of unusual but practically useful properties. Here, the authors produce an organic counterpart, atomically smooth monolayers of a molecular crystal, and use this organic analogue of graphene in high-performance organic field-effect transistors. |
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ISSN: | 2041-1723 2041-1723 |
DOI: | 10.1038/ncomms6162 |