Vertically Stacked Skin-Conformal Organic Photodetectors for Crosstalk-Free Signal Acquisition in Wearable Applications
발표자
정재빈 (아주대학교)
연구책임자
박성준 (아주대학교)
공동저자
정재빈 (아주대학교), 김재현 (아주대학교), 박성준 (아주대학교)
초록
내용
Organic photodetectors (OPDs) have garnered significant attention for wearable optoelectronic applications. Recently, as wearable platforms increasingly demand richer spectral information, multi-channel OPDs have emerged as promising candidates capable of resolving multiple wavelength channels from a single, space-limited on-skin location. However, existing multi-channel OPD architectures face key limitations: bias-switchable devices cannot acquire signals simultaneously, while previously reported stacked structures suffer from optical crosstalk and are typically fabricated on rigid substrates. Here, we present vertically stacked, skin-conformal double OPDs that enable fully isolated visible and near-infrared (NIR) detection at a single on-skin location. By leveraging crosstalk-free dual-wavelength sensing, the device reliably records oxygen saturation levels even under motion conditions, and further demonstrates dual-wavelength optical communication.