1 research outputs found
Highly Stretchable and Highly Conductive PEDOT:PSS/Ionic Liquid Composite Transparent Electrodes for Solution-Processed Stretchable Electronics
Stretchable conductive materials
have received great attention
owing to their potential for realizing next-generation stretchable
electronics. However, the simultaneous achievement of excellent mechanical
stretchability and high electrical conductivity as well as cost-effective
fabrication has been a significant challenge. Here, we report a highly
stretchable and highly conducting polymer that was obtained by incorporating
an ionic liquid. When 1-ethyl-3-methylimidazolium tetracyanoborate
(EMIM TCB) was added to an aqueous conducting polymer solution of
polyÂ(3,4-ethylenedioxythiophene):polyÂ(styrenesulfonate) (PEDOT:PSS),
it was found that EMIM TCB acts not only as a secondary dopant but
also as a plasticizer for PEDOT:PSS, resulting in a high conductivity
of >1000 S cm<sup>–1</sup> with stable performance at tensile
strains up to 50% and even up to 180% in combination with the prestrained
substrate technique. Consequently, by exploiting the additional benefits
of high transparency and solution-processability of PEDOT:PSS, we
were able to fabricate a highly stretchable, semitransparent, and
wholly solution-processed alternating current electroluminescent device
with unimpaired performance at 50% strain by using PEDOT:PSS/EMIM
TCB composite films as both bottom and top electrodes