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

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 sin- gle PMMA or SF dielectric or SF/PMMA bilayer dielectric, the OFETs with...

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Bibliographic Details
Published in:Chinese physics B 2014-03, Vol.23 (3), p.636-639
Main Author: 李海强 于军胜 黄伟 施薇 黄江
Format: Article
Language:English
Subjects:
Biocompatibility
Dielectrics
Field effect transistors
Pentacene
Performance enhancement
Polymethyl methacrylates
Semiconductor devices
Silk fibroin
丝素蛋白
并五苯
最佳性能
有机场效应晶体管
生物相容性
电介质
聚甲基丙烯酸甲酯
聚（甲基丙烯酸甲酯）
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Summary: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 sin- gle 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 elec- trical 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.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/3/038505