Electrochemical device including a channel of an organic material, a gate electrode, and an electrolyte therebetween

An electrochemical transistor device comprising:

• a flexible substrate;
• a layer of organic material arranged on said substrate, which material has the ability to electrochemically alter its electrical conductivity through change of redox state thereof, said layer of organic material comprising a source portion, a drain portion and a transistor channel portion;
• a layer of solidified electrolyte arranged in electric contact with said layer of organic material at said transistor channel portion, thereby defining said transistor channel portion, and
• a gate electrode arranged in electric contact with said solidified electrolyte, wherein said electrolyte is arranged in a sandwich structure between said layer of organic material and said gate electrode such that current between said source portion and drain portion is controllable by means of a potential applied to said gate electrode.