Standalone real-time health monitoring patch based on a stretchable organic optoelectronic system
Yeongjun Lee, Jong Won Chung, Gae Hwang Lee, Hyunbum Kang, Jooyoung Kim, Chisung Bae, Hyunjun Yoo, Sujin Jeong, Hyeon Cho, Sung‐Gyu Kang, Ji Young Jung, Don‐Wook Lee, Sangah Gam, Suk Gyu Hahm, Yasutaka Kuzumoto, Sang Joon Kim, Zhenan Bao, Yongtaek Hong, Youngjun Yun, Sunghan Kim
Abstract
Skin-like health care patches (SHPs) are next-generation health care 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 using a combination of stress relief layers and deformable micro-cracked interconnects that 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 health care electronics.