Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 22, Pages 18994-19000Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b00946
Keywords
electrochromism; electrochemical displays; ion gels; printed electronics; low-voltage devices; electrohydrodynamic printing
Funding
- Gyeongsangbuk-Do and Gyeongbuk Science & Technology Promotion Center of Korea [SF315012A]
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2015R1C1A2A01053066, 2016R1C1B2006296]
- National Research Foundation of Korea [2016R1C1B2006296] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, low-voltage, printed, ion gel-based electrochromic devices (ECDs) were successfully fabricated. While conventional dispensing printing provides irregularly printed electrochromic (EC) gels, we improved the adhesion between the printed gel and the substrate by applying an external voltage. This is called electrostatic-force-assisted dispensing printing. As a result, we obtained well-defined, printed, EC gels on substrates such as indium tin oxide-coated glass. We fabricated a gel-based ECD by simply sandwiching the printed EC gel between two transparent electrodes. The resulting ECD, which required a low coloration voltage (similar to 0.6 V), exhibited a high coloration efficiency (eta) of 161 cm(2)/C and a large transmittance contrast(similar to 82%) between the bleached and colored states at -0.7 V. In addition, electrostatic-force-assisted dispensing printing was utilized to fabricate directly patterned ECDs.
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