Biointegrated Multilayer Stretchable OLED Platform With Strain-Decoupled Architecture for Durable Phototherapeutic...

Area of Science:

• Materials Science
• Biomedical Engineering
• Optoelectronics

Background:

• Conventional stretchable organic light-emitting diode (SOLED) displays face limitations in resolution-stretchability trade-offs and encapsulation fragility.
• Achieving practical SOLEDs requires mechanical softness and robust environmental protection.

Purpose of the Study:

• To develop a novel SOLED architecture overcoming current limitations for advanced wearable medical technology.
• To demonstrate the potential of SOLEDs in therapeutic applications, such as wound healing.

Main Methods:

• A multilayer SOLED architecture was designed, separating light emission and mechanical deformation planes.
• Finite-element analysis and experimental measurements were used to evaluate mechanical properties and strain redistribution.
• A hybrid encapsulation combining atomic-layer-deposited nanolaminates and parylene-C was developed for environmental protection.

Main Results:

• The new architecture achieved approximately 54% system-level stretchability with stable electroluminescence under 50% uniaxial tensile strain.
• The hybrid encapsulation provided excellent barrier performance (1.26 × 10⁻⁶ g m⁻² day⁻¹) and UV blocking (99.87%).
• In a murine wound-healing model, the SOLED patch accelerated healing by over 50%.

Conclusions:

• The developed multilayer SOLED architecture offers significant improvements in stretchability and reliability for wearable displays.
• The hybrid encapsulation ensures device durability for long-term and outdoor operation.
• This technology shows strong potential for wearable therapeutic devices, demonstrated by accelerated wound healing.