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Solution-Processible Electrochromic Smart Glass

Summary

Electrochromic smart glass can switch its optical state from transparent to a tinted state reversibly with the application of a small voltage, typically in the range of 3 to 5V. The electrochromic smart-glass devices in the market today typically rely on vacuum deposition technique which is prohibitively expensive and slow.

This technology offers a fully printable electrochromic process, whereby the active electrochromic nanomaterials synthesized are formulated into inkjet-printable inks. Inkjet printing itself is a fast and attractive technology that is capable of a uniform large area deposition as well as localized patterning. This solution-processible method is a fast yet low-cost alternative in depositing active materials onto various substrates.

Technology Benefits

Long term cost savings in power consumption (up to 25% reduction) from air-conditioning
Control of solar irradiation through the window without sacrificing outside view
Capable of integrating with the internet-of-things, which will allow consumers to potentially control their housing shade via their mobile phones
Allows tinting-on-demand

Technology Application

Potential applications of electrochromic smart windows include (but are not limited to):

Windows in building fenestrations
Automobile
Aviation
Electrochromic signage, display or art installations
Eyewear
Other flexible or wearable electrochromics

Detailed Technology Description

Inkjet printable electrochromic device
Proprietary electrochromic ink formulation coupled with non-ITO based transparent conductors, such as silver nanoparticles and nanowires
Coupled ink formulation is capable of being inkjet printed on glass and other substrates
Delivers higher than 50% optical contrast
Able to switch from transparent to tinted reversibly
Requires a low applied voltage of less than 3V
Requires less than 30 seconds switching time
Can achieve above 80% transmittance with a sheet resistance of less than 50?/sq
Does not block out the view unlike conventional mechanical shutters
Capable of blocking much of the incoming solar irradiation when in the tinted state

Application Date

26-Aug-2015

ID No.

TO17531

Country/Region

Singapore

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