| Abstract [eng] |
Organic electronics is an alternative for conventional silicon and metal-based electronics, due to its lower manufacturing costs, eco-friendliness, and stretchability. Poly(3,4-ethylene dioxythiophene) polystyrene sulfonate (PEDOT:PSS) is often used in development of organic electronics. It is used in organic electrochemical transistors, transparent electrodes, sensors, and others. Electrochromism is a material phenomenon when it undergoes a color change due to electron transfer upon applied electrochemical potential. Electrochromic pixels can be a low-cost alternative for conventional displays due to inexpensive materials, energy efficiency, and facile fabrication processes. In contrast to their inorganic counterparts, polymeric electrochromic materials have much lower elastic moduli and, therefore, could be used for the development of stretchable electronics using scalable fabrication techniques, such as screen printing or roll-to-roll printing. Screen printing technology allows to create thin films cost-effectively and simply at a sufficiently high spatial resolution while retaining the capability of the rapid prototyping process. Electrochromic devices can be cheaper, energy-efficient alternatives to various screen-like devices. However, a stretchable polymer-based electrochromic device must be created beforehand to create a stretchable screen-like device. The aim of this work is to develop working prototype of stretchable electrochromic device. To do so, stretchable PEDOT:PSS electrochromic composite was created. Additionally, solid, transparent, stretchable, and polymer-based electrolyte was produced using elastomer water dispersion and lithium perchlorate. Stability of the dispersion was discussed and several methods to improve it were presented including pH adjustment and additional stabilization using surfactants. Screen printing technology was used to deposit created PEDOT:PSS and polyurethane composite and use it to develop working prototype of electrochromic cell. |
