Electrochemical device and methods for producing the same

A method of producing an electrochemical transistor device comprising the steps of:

• providing a source contact and a drain contact,
• providing an electrochemically active element between and in direct electrical contact with said source contact and said drain contact, wherein the element is arranged of organic material which has the ability to electrochemically altering its electrical conductivity through change of redox state thereof;
• providing a gate electrode of electrically conductive material, which is spatially separated from said source and drain contacts as well as said electrochemically active element;
• covering only a portion of said electrochemically active element with an ion isolative material;
• arranging a solidified electrolyte in direct electrical contact with at least a portion of said gate electrode and in direct electrical contact with a portion of said electrochemically active element free of said ion isolative material, such that current between said source contact and drain contact is controllable by means of a voltage applied to said gate electrode.

A method of producing an electrochemical device comprising the steps of:

• providing a flexible support comprising paper or plastic or combinations thereof;
• arranging a layer of electrochemically active material on said support, wherein the material is organic and has the ability to electrochemically altering its electrical conductivity through change of redox state thereof;
• providing a first electrode of electrically conductive material in direct electrical contact with said layer of electrochemically active material;
• providing a gate electrode of electrically conductive material, which is spatially separated from said electrochemically active material;
• arranging a ion isolative material such that it covers only a portion of said electrochemically active element;
• arranging a solidified electrolyte in direct electrical contact with at least a portion of said gate electrode and in direct electrical contact with a portion of said electrochemically active element free of said ion isolative material, such that a color of said electrochemically active material is controllable by means of a voltage applied to said gate electrode.

A method of producing a circuitry having electrochemical transistor(s) comprising the steps of:

• providing a substrate;
• providing several sets of potential transistors on said substrate, each set comprising:
• a source contact of electrically conductive material,
• a drain contact of electrically conductive material,
• an electrochemically active element arranged between, and in direct electrical contact with, the source and drain contacts, which element is arranged of organic material and has the ability to electrochemically altering its electrical conductivity through change of redox state thereof;
• and
• a gate contact of electrically conductive material;
• electing a first group of potential transistor sets and a second group of potential transistor sets, wherein each transistor set is either part of said first or said second group;
• arranging, for each potential transistor of said first group, solidified electrolyte in direct electrical contact with at least a portion of the gate electrode and at least a portion of the electrochemically active element of said potential transistor, such that current between said source contact and said drain contact, in direct electrical contact with said electrochemically active element, is controllable by means of a voltage applied to said gate electrode;
• completing the circuitry, wherein each electrochemically active element a potential transistor in said second group is kept free of electrolyte.

An electrochemical transistor device comprising:

• a source contact and a drain contact;
• an electrochemically active element between and in direct contact with said source contact and said drain contact, wherein the element is arranged of organic material which has the ability to electrochemically altering its electrical conductivity through change of redox state thereof;
• a gate electrode of electrically conductive material, which is spatially separated from said source and drain contacts as well as said electrochemically active element;
• a solidified electrolyte in direct electrical contact with at least a portion of said gate electrode and in direct electrical contact with a portion of said electrochemically active element such that current between said source contact and drain contact is controllable by means of a voltage applied to said gate electrode;
• ion isolative material, sandwiched between said electrochemically active element and said solidified electrolyte, such that it defines said transistor channel.