Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Enhancement of Stability in Soluble Acene Thin-film Transistors by Using Polymer/Inorganic Hybrid Gate-dielectrics

고분자/무기 하이브리드 절연막을 이용한 용액공정용 저분자 박막트랜지스터의 안정성 향상 연구

  • Lee, Wi Hyoung (Department of Textile Engineering, Konkuk University)
  • 이위형 (건국대학교 섬유공학과)
  • Received : 2012.10.13
  • Accepted : 2012.12.09
  • Published : 2012.12.31
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Abstract

Solution-processed small molecular semiconductors (soluble acenes) serve as ideal active materials for high-performance, printed organic thin-film transistors (OTFTs). However, device stability of soluble acene TFTs has not been intensively studied. Here, we showed that device stability of soluble acene TFTs can be significantly enhanced by the use of polymer/inorganic hybrid gate-dielectrics. Triethylsilylethynyl-anthradithiophene (TES-ADT) TFTs fabricated on polystyrene (PS)/$Al_2O_3$ hybrid gate dielectrics exhibited high performance such as high field-effect mobility ($0.6cm^2/Vs$) and on-off current ratio ($10^6$). In addition, transfer characteristic of the TFTs did not shift under the prolonged gate-bias (8000s). This outstanding device stability is due to the device structure which consists of highly crystalline TES-ADT crystals and trap-free PS/$Al_2O_3$ dielectric.

Keywords

Acknowledgement

Supported by : 건국대학교

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