Stretchable semiconductor film with biocompatibility and bio-implantable electronic device using the same

An implantable bioelectronic device, comprising:

• a substrate;
• a gate electrode formed on the substrate;
• a gate insulating layer formed on the gate electrode;
• a stretchable semiconductor layer having biocompatibility formed on the gate insulating layer;
• and
• a source electrode and drain electrode formed to be spaced apart from each other on the stretchable semiconductor layer,
• wherein the gate electrode, the source electrode, and the drain electrode are configured as a bilayer electrode composed of gold and silver,
• the stretchable semiconductor layer having biocompatibility comprises:
• an elastomer matrix having biocompatibility;
• and
• a semiconducting polymer of an interconnected semiconductor nanofiber network embedded in the elastomer matrix,
• wherein the semiconducting polymer of the interconnected semiconductor nanofiber network is formed by phase separation due to a difference in surface energy between the semiconducting polymer and the elastomer matrix during mixing of the semiconducting polymer and the elastomer matrix, and
• the elastomer matrix is vulcanized and, accordingly, chemically cross-linked.