Rational Molecular Design of π-Extended Thiazolothiazole for High-Performance UV-OPDs Seamlessly Integrated with CMOS
발표자
표원준 (포항공과대학교)
연구책임자
정대성 (포항공과대학교)
초록
내용
Vacuum-deposited organic photodiodes (OPDs) offer unique advantages but achieving ultraviolet (UV) selectivity in such devices remains a key challenge. This is due to the need to reconcile two competing design requirements: (1) strong π–π stacking for efficient charge transport, and (2) limited π-conjugation to retain a wide bandgap suitable for UV absorption and vacuum deposition. Here, we report a molecular design strategy for UV-selective OPDs based on thiazolothiazole (Tz)-based small molecules with tailored backbone planarity and conjugation length. The optimized devices achieve outstanding UV selectivity, high specific detectivity, and fast dynamic response—representing the highest performance reported to date. Furthermore, we demonstrate the seamless integration of these semi-transparent OPDs with CMOS image sensors, underscoring their potential for multifunctional imaging applications.