A Review of Flexible Medical Sensors Using Polycrystalline Organic Electronics: Bridging Biomedical Engineering and Emerging Materials

Sidra A. Shaikh

Abstract: This review summarizes the application of polycrystalline organic semiconductors in flexible medical sensors, emphasizing their mechanical compatibility with soft tissues and the scalability of roll-to-roll fabrication. Key materials, such as TIPS-pentacene, DNTT, and poly(3-hexylthiophene), are discussed in terms of grain-boundary control for enhanced field-effect mobility and stability under bending radii less than 2 millimeters. Encapsulation approaches using perylene, hydrogels, and biodegradable PLA ensure device durability over tens of cm?. Representative devices include pressure-sensitive diodes, piezoresistive RFID tags, amperometric lactate sensors, thermosensitive MOS capacitors, and near-field communication (NFC)- enabled ECG patches. This review provides design guidelines for integrating organic thin films into wearable and implantable diagnostic platforms.

Keywords: flexible medical sensors, polycrystalline organic semiconductors, TIPS-pentacene, DNTT, grain-boundary morphology, organic electronics, roll-to-roll printing, biomedical engineering, wearable devices

How to Cite?: Sidra A. Shaikh, "A Review of Flexible Medical Sensors Using Polycrystalline Organic Electronics: Bridging Biomedical Engineering and Emerging Materials", Volume 14 Issue 8, August 2025, International Journal of Science and Research (IJSR), Pages: 1656-1662, https://www.ijsr.net/getabstract.php?paperid=SR25826123533, DOI: https://dx.doi.org/10.21275/SR25826123533