Channel width effect for organic thin film transistors using TIPS-pentacene employed as a dopant of poly-triarylamine

Jae Hong Kwon, Sang Il Shin, Jinnil Choi, Myung Ho Chung, Tae Yeon Oh, Kyung Hwan Kim, Min Ju Cho, Kyu Nam Kim, Dong Hoon Choi, Byeong Kwon Ju

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22 Citations (Scopus)


The effects of the physical channel width on the characteristics of organic thin film transistors (OTFTs), made with 6,13-bis(triisopropyl-silylethynyl)-pentacene (TIPS-pentacene) embedded into poly-triarylamine (PTAA, hole conductor within an active channel), have been examined in this paper. The devices are estimated by measuring the drain-source current (IDS) for different contact metals such as Au and Ag, at fixed gate and drain voltages. The results show that the threshold voltage (VT) and IDS increase with increasing channel width. Furthermore, it has been observed that the field effect mobility is dependent on VT, which is influenced by the channel width. The OTFTs, produced using Au and Ag contacts, exhibited the highest values of mobility in the saturation regime, namely 5.44 × 10-2 and 1.33 × 10-2 cm2/Vs, respectively.

Original languageEnglish
Pages (from-to)729-734
Number of pages6
JournalOrganic Electronics
Issue number4
Publication statusPublished - 2009 Jul

Bibliographical note

Funding Information:
This work was supported by the National Research Laboratory (NRL, No. R0A-2007-000-20111-0) Program of the Ministry of Education, Science and Technology (Korea Science and Engineering Foundation, KOSEF), the KOSEF grant funded by the Korea Ministry of Education, Science and Technology (MEST) (No. R11-2007-045-01003-0) and the KRF Grant funded by the Korean Government (MOEHRD) (KRF-2007-511-D00099). Particularly, D.H. Choi acknowledges the financial support by 21 st Century Frontier Research Program (2008–2009).


  • 6,13-Bis(triisopropyl-silylethynyl)-pentacene
  • Channel width effect
  • Organic thin film transistor
  • Poly-triarylamine

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering


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