Samsung Advanced Institute of Technology

Skin-like healthcare patches (SHPs) are next-generation healthcare gadgets that will enable seamless monitoring of biological signals in daily life. Skin-conformable sensors and a stretchable display are critical for the development of standalone SHPs that provide real-time information while alleviating privacy concerns related to wireless data transmission. However, the production of stretchable wearable displays with sufficient pixels to display this information remains challenging. Here, we report a standalone organic SHP that provides real-time heart-rate information. The 15 μm-thick SHP comprises a stretchable organic light-emitting diode display and stretchable organic photoplethysmography (PPG) heart-rate sensor on all-elastomer substrate, and operates stably under 30％ strain through the combination with novel stress relief layers and deformable micro-cracked interconnects to reduce the mechanical stress on the active optoelectronic components. This approach provides a rational strategy for high-resolution stretchable displays, enabling the production of ideal platforms for next-generation wearable healthcare electronics.