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Highly Crystalline Soluble Acene Crystal Arrays for Organic Transistors: Mechanism of Crystal Growth During Dip-Coating

Title
Highly Crystalline Soluble Acene Crystal Arrays for Organic Transistors: Mechanism of Crystal Growth During Dip-Coating
Author
장재영
Keywords
soluble acenes; organic field-effect transistors; dip-coating; solvent boiling point; evaporation-induced self-assembly; solution-crystallization
Issue Date
2012-03
Publisher
WILEY-V C H VERLAG GMBH
Citation
Advanced Functional Materials, 2012, 22(5), P.1005-1014
Abstract
The preparation of uniform large-area highly crystalline organic semiconductor thin films that show outstanding carrier mobilities remains a challenge in the field of organic electronics, including organic field-effect transistors. Quantitative control over the drying speed during dip-coating permits optimization of the organic semiconductor film formation, although the kinetics of crystallization at the airsolutionsubstrate contact line are still not well understood. Here, we report the facile one-step growth of self-aligning, highly crystalline soluble acene crystal arrays that exhibit excellent field-effect mobilities (up to 1.5 cm V-1 s-1) via an optimized dip-coating process. We discover that optimized acene crystals grew at a particular substrate lifting-rate in the presence of low boiling point solvents, such as dichloromethane (b.p. of 40.0 degrees C) or chloroform (b.p. of 60.4 degrees C). Variable-temperature dip-coating experiments using various solvents and lift rates are performed to elucidate the crystallization behavior. This bottom-up study of soluble acene crystal growth during dip-coating provides conditions under which one may obtain uniform organic semiconductor crystal arrays with high crystallinity and mobilities over large substrate areas, regardless of the substrate geometry (wafer substrates or cylinder-shaped substrates).
URI
https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.201102284http://repository.hanyang.ac.kr/handle/20.500.11754/69485
ISSN
1616-301X
DOI
10.1002/adfm.201102284
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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