Flexible high capacitance nanocomposite gate insulator for printed organic field-effect transistors

THIN SOLID FILMS

卷:518

Article

Rasul, Amjad^1,2  Zhang, Jie³  Gamota, Dan³  Singh, Manish¹  Takoudis, Christos^1,4 

[1] Univ Illinois, Dept Chem Engn, Chicago, IL 60607 USA

[2] Motorola Inc, Phys Realizat Res Ctr, Schaumburg, IL 60196 USA

[3] Printovate Technol Inc, Palatine, IL 60074 USA

[4] Univ Illinois, Dept Bioengn, Chicago, IL 60607 USA

关键词: Nanocomposite;    Gate insulator;    Organic field-effect transistors;    Printed electronics;    Electrical properties and measurements;   

DOI  :  10.1016/j.tsf.2010.06.058

来源: Elsevier

【 摘 要 】

Ceramic-polymer nanocomposite dielectric consisting of an epoxy solution with propylene glycol methyl ether acetate as the solvent and barium titanate nanoparticles with capacitance in excess of 60 pF/mm(2) was developed and utilized as the gate insulator for organic field-effect transistors (OFETs). The high relative permittivity (kappa= 35), bimodal nanocomposite utilized had two different filler particle sizes 200 nm and 1000 nm diameter particles. Bottom gate organic filed-effect transistors were demonstrated using a commercially available printing technology for material deposition. A metal coated plastic film was used as the flexible gate substrate. Solution processable, p-type arylamine-based amorphous organic semiconductor was utilized as the active layer. Fabricated OFETs with the solution processed nanocomposite dielectric had a high field-induced current and a low threshold voltage; these results suggest that the low operating voltage was due to the high capacitance gate insulator. In this paper, we review the characteristics of the nanocomposite dielectric material and discuss the processing and performance of the printed organic devices. (C) 2010 Elsevier B.V. All rights reserved

【 授权许可】

Free