期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 43, 期 7, 页码 2631-2636出版社
SPRINGER
DOI: 10.1007/s11664-014-3143-0
关键词
Organic thin-film transistors; printed electronics; all-inkjet-printed
资金
- FEDER through the COMPETE Program
- Portuguese Foundation for Science and Technology (FCT) [PEST-C/FIS/UI607/2011, PTDC/CTM-NAN/121038/2010]
- Matepro-Optimizing Materials and Processes [NORTE-07-0124-FEDER-000037]
- Programa Operacional Regional do Norte under the Quadro de Referencia Estrategico Nacional (QREN), through the Fundo Europeu de Desenvolvimento Regional (FEDER) [ON. 2 - O Novo Norte]
- FCT [SFRH/BDE/33350/2008]
- Fundação para a Ciência e a Tecnologia [PTDC/CTM-NAN/121038/2010, SFRH/BDE/33350/2008] Funding Source: FCT
Technological restrictions of the inkjet printing technology for printed electronics can hinder its application potential, mainly due to the limited resolution and layer homogeneity in comparison to conventional manufacturing techniques for electronics. The manufacturing of active devices such as thin-film transistors with appropriate performance using printing technologies is still one of the current challenges towards industrial applications. This work demonstrates the application of an ultraviolet (UV) curable ink as insulating material for the gate dielectric. The advantage of the UV curable ink is its fast curing and the smooth surface enabling high resolution patterns on top of it. In this way, all-inkjet-printed organic thin-film transistors (OTFTs) were fabricated with silver electrodes, UV curable gate dielectric, and 6,13-bis(triisopropylsilylethynyl)pentacene for the active semiconductor layer. By fine tuning of processing parameters and pattern geometries, a stable channel length of about 10 mu m was obtained in the bottom-gate configuration without the need of additional steps, suggesting a way to build low-cost all-inkjet-printed OTFTs with well-defined source-drain electrodes and fast UV curable dielectric without any additional steps. The inkjet-printed device is characterized by an electron mobility of 0.012 cm(2) V-1 s(-1) and on/off ratio of 10(3).
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