Importance of active layer positioning on gate electrode in organic thin-film transistors

Jihwan Park, Jin Hyuk Kwon, Nicolas Battaglini, Philippe Lang, Jin Hyuk Bae, Hyeok Kim

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We describe the importance of active layer positioning for a gate electrode in organic thin-film transistors (TFTs). For this study, we utilizea numerical simulation based on 2-D Atlas, which is a two-dimensional technology computer aided design (so called 2D TCAD) software tool created by Silvaco. Variation in the electrical characteristics of pentacene TFTs is systematically explored by changing the mismatch length (LM) between the active layer and gate electrode in the bottom-gate top-contact configuration. It is found that as the LM increases, the electrical performance of pentacene TFTs is exponentially degraded in terms of drain current on/off characteristics. In particular, we explain this phenomenon by examining variations in charge distribution and gate electric field in the TFT channel region byincreasing the LM.

Original languageEnglish
Pages (from-to)72-78
Number of pages7
JournalMolecular Crystals and Liquid Crystals
Issue number1
StatePublished - 2 Jan 2018


  • Channel
  • electric field
  • mismatch length
  • organic thin-film transistor


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