Inducement of azimuthal molecular orientation of pentacene by imprinted periodic groove patterns for organic thin-film transistors

Sung Jin Jo, Chang Su Kim, Min Jung Lee, Jong Bok Kim, Seung Yoon Ryu, Joo Hyon Noh, Kyuwook Ihm, Hong Koo Baik, Youn Sang Kim

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A new strategy for control of the in-plane orientation of azimuthal pentacene molecules using imprinted nanometer-scale periodic groove patterns for organic thin-film transistors (OTFT) as an alignment layer was introduced. Pentacene channels were deposited on the patterned alignment layer for the fabrication of the OTFT, and gold was thermally evaporated through a shadow mask to form the source/drain electrodes. The results show that the anisotropic mass transport along the nanometer-scale relief of the substrate is responsible for the enhanced crystal growth in the direction parallel to the grooves. Two absorption peaks at 581 and 667 nm and two shoulders at 542 and 629 nm are observed in the absorption spectra of pentacene. The results also indicate that the nanometer-scale patterns allow most of the pentacene molecules to nucleate along the grooves as the size of the monolayer island of pentacene is comparable to that of the space between the grooves.

Original languageEnglish
Pages (from-to)1146-1153
Number of pages8
JournalAdvanced Materials
Volume20
Issue number6
DOIs
Publication statusPublished - 2008 Mar 18

Fingerprint

Molecular orientation
Thin film transistors
Molecules
Crystal growth
Masks
Absorption spectra
Monolayers
Mass transfer
Gold
Fabrication
Electrodes
Substrates
Crystallization
pentacene

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Jo, Sung Jin ; Kim, Chang Su ; Lee, Min Jung ; Kim, Jong Bok ; Ryu, Seung Yoon ; Noh, Joo Hyon ; Ihm, Kyuwook ; Baik, Hong Koo ; Kim, Youn Sang. / Inducement of azimuthal molecular orientation of pentacene by imprinted periodic groove patterns for organic thin-film transistors. In: Advanced Materials. 2008 ; Vol. 20, No. 6. pp. 1146-1153.
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Inducement of azimuthal molecular orientation of pentacene by imprinted periodic groove patterns for organic thin-film transistors. / Jo, Sung Jin; Kim, Chang Su; Lee, Min Jung; Kim, Jong Bok; Ryu, Seung Yoon; Noh, Joo Hyon; Ihm, Kyuwook; Baik, Hong Koo; Kim, Youn Sang.

In: Advanced Materials, Vol. 20, No. 6, 18.03.2008, p. 1146-1153.

Research output: Contribution to journalArticle

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