High
Performance and Long-Term Stability in Ambiently Fabricated Segmented
Solid-State Polymer Electrochromic Displays
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Abstract
This work reports on the performance
of a segmented polymer electrochromic display that was fabricated
with solution-based processes in ambient atmosphere. An encapsulation
process and the combination of structured wells for the polymer electrochrome
and electrolyte layers as well as the use of a preoxidized counter
polymer yields high contrasts and fast switching speeds. Asymmetric
driving–with respect to time–of the display is investigated
for the first time and the degradation effects in the electrochrome
layer are analyzed and addressed to yield a stable device exceeding
100 000 switching cycles. A printed circuit board was integrated
with the display, allowing the device to be run as a clock, where
the segments only required short pulses to switch without the need
for a constant current to maintain its state. Such an application
pairs well with the advantages of electrochromic polymers, drawing
on its high contrast, stability, and ability to maintain its colored
or colorless state without the need for a constant power supply, to
demonstrate the promise as well as the challenges of developing more
sophisticated electrochromic devices