3D Printed Skin-Interfaced UV-Visible Hybrid Photodetectors

Area of Science:

• Materials Science
• Biomedical Engineering
• Optoelectronics

Background:

• Photodetectors interfaced with skin are crucial for monitoring photosensitive diseases.
• Existing devices often lack the necessary flexibility and UV-enhanced response for accurate dermatological health assessments.

Purpose of the Study:

• To develop a flexible, 3D-printed photodetector array with UV-enhanced broadband photoresponse.
• To create a wearable device for in-situ, real-time optical irradiance monitoring on skin surfaces.

Main Methods:

• Fabrication of a flexible photodetector array using a hybrid organic-inorganic material system.
• Incorporation of zinc oxide nanoparticles into polymeric photoactive materials to enhance UV response and induce photomultiplication.
• Integration with a portable console for continuous monitoring.

Main Results:

• Demonstration of a fully 3D-printed, flexible UV-visible photodetector array.
• Achieved enhanced UV photoresponse and photomultiplication effect using zinc oxide nanoparticles.
• Successful in-situ monitoring of natural irradiance (310-650 nm) for nearly 24 hours on a skin-interfaced system.

Conclusions:

• The developed photodetector array meets the requirements for compliant, skin-interfaced medical devices.
• This technology enables precise, real-time optical irradiance measurements critical for diagnosing and managing photosensitive skin conditions.