Terahertz characterisation of UV offset lithographically printed electronic-ink

Zeng, Y., Edwards, M., Stevens, R., Bowen, J. W., Donnan, R. S. and Yang, B. (2017) Terahertz characterisation of UV offset lithographically printed electronic-ink. Organic Electronics, 48 (September). pp. 382-388. ISSN 1566-1199 doi: 10.1016/j.orgel.2017.06.012

Abstract/Summary

Inkjet-printed electronics are showing promising potential in practical applications, but methods for real-time, non-contact monitoring of printing quality are lacking. This work explores Terahertz (THz) sensing as an approach for such monitoring. It is demonstrated that alterations in the localised dielectric characteristics of inkjet-printed electronics can be qualitatively distinguished using quasi-optically-based, sub-THz reflection spectroscopy. Decreased reflection coefficients caused by the sintering process are observed and quantified. Using THz near-field scanning imaging, it is shown that sintering produces a more uniform spatial distribution of permittivity in the printed carbon patterns. Images generated using THz-TDS based imaging are presented, demonstrating the combination of high resolution imaging with quantification of complex permittivities. This work, for the first time, demonstrates the feasibility of quality control in printed electronic-ink with THz sensing, and is of practical significance to the development of in-situ and non-contact commercial-quality characterisation methods for inkjet-printed electronics.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/71085
Item Type	Article
Refereed	Yes
Divisions	Life Sciences > School of Biological Sciences > Department of Bio-Engineering
Uncontrolled Keywords	Inkjet-printed electronics; THz sensing; Spectroscopy; THz imaging
Publisher	Elsevier
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