Photosensitive and Flexible Organic Field-Effect Transistors Based on Interface Trapping Effect and Their Application...

Area of Science:

• Materials Science
• Organic Electronics
• Biomaterials

Background:

• Flexible organic phototransistors (FOTs) are crucial for advanced electronic applications.
• Developing FOTs with high performance and utilizing sustainable materials remains a key challenge.

Purpose of the Study:

• To fabricate and characterize flexible organic phototransistors using polylactide (PLA) as a dielectric material.
• To investigate the impact of PLA's polar groups on device performance, specifically photosensitivity.

Main Methods:

• Fabrication of FOTs with PLA as the dielectric layer.
• Characterization of device performance, including photosensitivity measurements.
• Integration of FOTs into a sensor array for imaging applications.

Main Results:

• The fabricated FOTs demonstrated a high photosensitivity of approximately 10^4.
• The polar groups in the PLA dielectric layer were identified as the cause of the observed charge trapping effect.
• Successful imaging of a star pattern using a sensor array of the developed FOTs.

Conclusions:

• Polylactide (PLA) is a viable and effective polar bio-material for dielectric layers in FOTs.
• The charge trapping effect in PLA significantly enhances phototransistor photosensitivity.
• The developed FOTs show excellent performance and potential for imaging sensor applications.