A sub-150-nanometre-thick and ultraconformable solution-processed all-organic transistor

Area of Science:

• Organic electronics
• Materials science
• Nanotechnology

Background:

• Advancements in electronics enable new applications like tattoo electronics, requiring ultrathin, conformable devices.
• Organic materials allow nanometric film deposition, but current processes yield devices hundreds of nanometers thick, limiting applications.
• Existing field-effect transistors face limitations in thickness and flexibility for conformal applications.

Purpose of the Study:

• To develop an all-organic field-effect transistor (OFET) with unprecedentedly low thickness.
• To achieve fabrication of ultrathin OFETs through a fully solution-based approach.
• To overcome limitations in device conformability and flexibility for advanced electronic applications.

Main Methods:

• Fabrication of an all-organic field-effect transistor using a fully solution-based approach.
• Achieving a total device thickness of less than 150 nanometers.
• Characterization of device conformability on nonplanar surfaces and bending capabilities.

Main Results:

• An all-organic field-effect transistor with a thickness below 150 nanometers was successfully fabricated.
• The ultrathin device demonstrates conformal adhesion onto nonplanar surfaces like human skin.
• The device can be bent to a radius lower than 1 micrometer, showcasing exceptional flexibility.

Conclusions:

• The developed solution-processed, ultrathin organic field-effect transistor represents a fundamental advancement for tattoo electronics.
• The unprecedented thinness and flexibility overcome key limitations for conformable electronic devices.
• This technology opens new possibilities for wearable and implantable organic electronic systems.