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Kwak, Sang Kyu
Kyu’s MolSim Lab @ UNIST
Research Interests
  • Molecular modeling and simulation, statistical thermodynamics, molecular physics

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Enhancing 2D growth of organic semiconductor thin films with macroporous structures via a small-molecule heterointerface

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Title
Enhancing 2D growth of organic semiconductor thin films with macroporous structures via a small-molecule heterointerface
Author
Kang, BoseoJang, MoonjeonChung, YoonyoungKim, HaenaKwak, Sang KyuOh, Joon HakCho, Kilwon
Issue Date
2014-08
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v.5, pp.4752
Abstract
The physical structure of an organic solid is strongly affected by the surface of the underlying substrate. Controlling this interface is an important issue to improve device performance in the organic electronics community. Here we report an approach that utilizes an organic heterointerface to improve the crystallinity and control the morphology of an organic thin film. Pentacene is used as an active layer above, and m-bis(triphenylsilyl) benzene is used as the bottom layer. Sequential evaporations of these materials result in extraordinary morphology with far fewer grain boundaries and myriad nanometre-sized pores. These peculiar structures are formed by difference in molecular interactions between the organic layers and the substrate surface. The pentacene film exhibits high mobility up to 6.3 cm(2)V(-1)s(-1), and the pore-rich structure improves the sensitivity of organic-transistor-based chemical sensors. Our approach opens a new way for the fabrication of nanostructured semiconducting layers towards high-performance organic electronics.
URI
https://scholarworks.unist.ac.kr/handle/201301/6412
URL
https://www.nature.com/articles/ncomms5752
DOI
10.1038/ncomms5752
ISSN
2041-1723
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