Rational Molecular Design of π-Extended Thiazolothiazole for High-Performance UV-OPDs Seamlessly Integrated with CMOS
발표자
표원준 (포항공과대학교)
연구책임자
정대성 (포항공과대학교)
공동저자
표원준 (포항공과대학교), 정대성 (포항공과대학교)
초록
내용
Vacuum-deposited organic photodiodes (OPDs) offer unique advantages—including narrowband selectivity and compatibility with standard fabrication processes—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. The optimized devices achieve outstanding UV selectivity (full-width at half-maximum: 60 nm), high specific detectivity (1.06 × 10¹² Jones), and fast dynamic response (cutoff frequency of 50,100 Hz). Furthermore, we demonstrate the seamless integration of these semi-transparent OPDs with CMOS image sensors, underscoring their potential for multifunctional imaging applications.