Transparent organic upconversion devices for near-infrared sensing

Area of Science:

• Optoelectronics
• Materials Science

Background:

• Near-infrared (NIR) illumination is crucial for night vision applications.
• Organic upconversion devices offer potential for efficient light conversion.

Purpose of the Study:

• To demonstrate transparent organic upconversion devices for night vision.
• To evaluate the performance of these devices in displaying 3D images under NIR illumination.

Main Methods:

• Fabrication of transparent organic upconversion devices.
• Testing device performance under NIR illumination in dark conditions.
• Demonstration of night vision with real objects and 3D image display.

Main Results:

• Achieved an exceptionally high current gain (>15,000) at 3 V, indicating high sensitivity to NIR light.
• Demonstrated a maximum luminance exceeding 1500 cd m⁻² at 7 V.
• Successfully displayed 3D images of real objects, a novel advancement over previous 2D projections.

Conclusions:

• The developed transparent organic upconversion devices exhibit high performance for NIR light detection.
• The ability to display 3D images signifies a significant advancement in night vision technology.
• These devices hold considerable promise for practical applications in night vision and beyond.