ELECTROACTIVE BLENDS AND LAYERS, AND DEVICES MADE FROM THESE

摘要

The present invention relates to an ion-modulated organic transistor (100), comprised of a phase separated blend (90) of a semiconducting polymer (30) and an isolating polymeric material (60), and an electro yte (65) comprising an eutectic mixture (70) situated between the S-C and G electrodes. The transistor operates at low voltages, is fast, can be applied to rough surfaces, and is optionally biodegradable. This is achieved by the use of a phase separation of the semiconducting polymer (30) within the blend (90) into two different phases (31 and 32). The vertical phase separation makes a thin semiconducting layer (31) on top of the blend making faster devices possible, the thin semiconducting layer (31) on top also ensure good device properties even if deposited on rough surfaces (80). By the introduction of an eutectic mixture (70) into the electrolyte (65) between the gate electrode (40) and the phase separated blend (90), device modulation can be achieved. Said thin vertically phase separated organic semiconductor layer (31) is in contact with the source electrode (10) and the drain electrode (11) of the transistor directly or via th e lateral phase separated semiconducting polymer phase (32). In operation a potential (50) applied to the gate electrode (40) controls the current A between the source electrode (10) and the drain electrode (11).