All-solution-processed ultraflexible wearable sensor enabled with universal trilayer structure for organic optoelectronic devices
Lulu Sun, Jiachen Wang, Hiroyuki Matsui, Shinyoung Lee, Wenqing Wang, Shuyang Guo, Hongting Chen, Kun Fang, Yoshihiro Ito, Daishi Inoue, Daisuke Hashizume, Kazuma Mori, Masahito Takakuwa, Sunghoon Lee, Yinhua Zhou, Tomoyuki Yokota, Kenjiro Fukuda, Takao Someya
Abstract
All-solution-processed organic optoelectronic devices can enable the large-scale manufacture of ultrathin wearable electronics with integrated diverse functions. However, the complex multilayer-stacking device structure of organic optoelectronics poses challenges for scalable production. Here, we establish all-solution processes to fabricate a wearable, self-powered photoplethysmogram (PPG) sensor. We achieve comparable performance and improved stability compared to complex reference devices with evaporated electrodes by using a trilayer device structure applicable to organic photovoltaics, photodetectors, and light-emitting diodes. The PPG sensor array based on all-solution-processed organic light-emitting diodes and photodetectors can be fabricated on a large-area ultrathin substrate to achieve long storage stability. We integrate it with a large-area, all-solution-processed organic solar module to realize a self-powered health monitoring system. We fabricate high-throughput wearable electronic devices with complex functions on large-area ultrathin substrates based on organic optoelectronics. Our findings can advance the high-throughput manufacture of ultrathin electronic devices integrating complex functions.