中国物理B ›› 2014, Vol. 23 ›› Issue (3): 38505-038505.doi: 10.1088/1674-1056/23/3/038505

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

High performance pentacene organic field-effect transistors consisting of biocompatible PMMA/silk fibroin bilayer dielectric

李海强, 于军胜, 黄伟, 施薇, 黄江   

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 收稿日期:2013-07-06 修回日期:2013-08-01 出版日期:2014-03-15 发布日期:2014-03-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61177032), the Foundation for Innovation Groups of the National Natural Science Foundation of China (Grant No. 61021061), the Fundamental Research Funds for the Central Universities, China (Grant No. ZYGX2010Z004), and the Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars of the Education Ministry of China (Grant No. GGRYJJ08-05).

High performance pentacene organic field-effect transistors consisting of biocompatible PMMA/silk fibroin bilayer dielectric

Li Hai-Qiang (李海强), Yu Jun-Sheng (于军胜), Huang Wei (黄伟), Shi Wei (施薇), Huang Jiang (黄江)   

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2013-07-06 Revised:2013-08-01 Online:2014-03-15 Published:2014-03-15
  • Contact: Yu Jun-Sheng E-mail:jsyu@uestc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61177032), the Foundation for Innovation Groups of the National Natural Science Foundation of China (Grant No. 61021061), the Fundamental Research Funds for the Central Universities, China (Grant No. ZYGX2010Z004), and the Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars of the Education Ministry of China (Grant No. GGRYJJ08-05).

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摘要： Pentacene organic field-effect transistors (OFETs) based on single-or double-layer biocompatible dielectrics of poly(methyl methacrylate) (PMMA) and/or silk fibroin (SF) are fabricated. Compared with those devices based on single PMMA or SF dielectric or SF/PMMA bilayer dielectric, the OFETs with biocompatible PMMA/SF bilayer dielectric exhibit optimal performance with a high field-effect mobility of 0.21 cm2/Vs and a current on/off ratio of 1.5×104. By investigating the surface morphology of the pentacene active layer through atom force microscopy and analyzing the electrical properties, the performance enhancement is mainly attributed to the crystallization improvement of the pentacene and the smaller interface trap density at the dielectric/organic interface. Meanwhile, a low contact resistance also indicates that a good electrode/organic contact is formed, thereby assisting the performance improvement of the OFET.

关键词: organic filed-effect transistors (OFETs), poly(methyl methacrylate), silk fibroin, bilayer dielectric

Abstract: Pentacene organic field-effect transistors (OFETs) based on single-or double-layer biocompatible dielectrics of poly(methyl methacrylate) (PMMA) and/or silk fibroin (SF) are fabricated. Compared with those devices based on single PMMA or SF dielectric or SF/PMMA bilayer dielectric, the OFETs with biocompatible PMMA/SF bilayer dielectric exhibit optimal performance with a high field-effect mobility of 0.21 cm2/Vs and a current on/off ratio of 1.5×104. By investigating the surface morphology of the pentacene active layer through atom force microscopy and analyzing the electrical properties, the performance enhancement is mainly attributed to the crystallization improvement of the pentacene and the smaller interface trap density at the dielectric/organic interface. Meanwhile, a low contact resistance also indicates that a good electrode/organic contact is formed, thereby assisting the performance improvement of the OFET.

Key words: organic filed-effect transistors (OFETs), poly(methyl methacrylate), silk fibroin, bilayer dielectric

中图分类号:  (Field effect devices)

  • 85.30.Tv
85.50.-n (Dielectric, ferroelectric, and piezoelectric devices) 68.35.-p (Solid surfaces and solid-solid interfaces: structure and energetics) 73.40.Cg (Contact resistance, contact potential)