Development of Conjugated Polymers from Pharmaceutical Intermediates for High-Performance Panchromatic Organic Photodetectors and Fingerprint Image Sensors
발표자
김명인 (한양대학교)
연구책임자
정인환 (한양대학교)
공동저자
김명인 (한양대학교), 이수민 (한양대학교), 정인환 (한양대학교)
초록
내용
In this study, novel conjugated polymers containing electron-withdrawing building blocks, easily synthesized from a 2-aminothiazole-4-carboxylate schiff base commonly used as a pharmaceutical intermediate, are developed for high-performance organic photodetectors (OPDs) and fingerprint-on-display (FoD) sensors. Through alkyl chain engineering of the synthesized polymers, the OPDs achieved the highest photocurrent density and lowest dark current density, resulting in device performance with a promising responsivity of 0.42 A/W and a specific detectivity of 2.6 × 1013 Jones at −2 V under 810 nm near-infrared irradiation. In addition, they exhibited excellent performance with a rising response time of 3–4 µs, falling response time of 6–11 µs, and −3 dB cut-off frequency of 80–100 kHz. Finally, the OPD is integrated into an organic thin-film transistor (OTFT) array to build a FoD sensor with 80 × 80 µm2 pixels, resulting in the successful acquisition of a digital fingerprint image.