Dual-Channel Co-Regulated Organic Phototransistors for Ultrasensitive Near-Infrared Biomimetic Eyes

Area of Science:

• Optoelectronics
• Biomimetic Engineering
• Materials Science

Background:

• Advanced machine vision demands imaging devices with enhanced spectral detection capabilities.
• High-performance near-infrared (NIR) biomimetic eyes are crucial for these applications.
• Existing NIR organic photodetectors face limitations like high noise, low sensitivity, and poor flexibility.

Purpose of the Study:

• To propose and demonstrate an ultrasensitive hemispherical NIR phototransistor array for high-definition biomimetic eyes.
• To overcome the limitations of current NIR organic photodetectors.
• To enable advanced machine vision applications.

Main Methods:

• Development of an ultrasensitive hemispherical NIR phototransistor array.
• Implementation of a dual-channel co-regulated strategy.
• Utilization of a semiconductor-insulator-semiconductor sandwich structure for the photosensitive layer.

Main Results:

• The phototransistor array exhibits extraordinary photosensitivity (≈10^8) and specific detectivity (≈10^13 Jones) under NIR illumination.
• The device boasts an ultra-thin, substrate-less structure with a thickness of ≈720 nm.
• High-quality, retina-like imaging was achieved, demonstrating the system's potential.

Conclusions:

• The proposed ultrasensitive NIR phototransistor array effectively addresses the limitations of existing technologies.
• The developed biomimetic eye system achieves high-definition imaging capabilities.
• This technology shows significant promise for smart biomimetic visualization and advanced machine vision applications.