Effects of the permanent dipoles of self-assembled monolayer-treated insulator surfaces on the field-effect mobility of a pentacene thin-film transistor

Yunseok Jang, Jeong Ho Cho, Do Hwan Kim, Yeong Don Park, Minkyu Hwang, Kilwon Cho

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In order to investigate the effects of permanent dipoles on insulator surfaces on the electrical properties of organic thin-film transistors, the authors fabricated insulators with various self-assembled monolayers and similar surface energies. Surprisingly, they found that the field-effect mobility of pentacene thin-film transistors increases by a factor of approximately 20 for insulators with an electron-withdrawing group. This remarkable increase in the field-effect mobility is due to the increase in the hole density of the insulator surface that arises from the increased band bending of the insulator/semiconductor interface.

Original languageEnglish
Article number132104
JournalApplied Physics Letters
Issue number13
Publication statusPublished - 2007 Apr 8


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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