•연구자: 물리학과 위상원, 이윤상
•발표일: 2026.05.01
•DOI: https://doi.org/10.1002/cnl2.70150
•Sangwon Wi and Yunsang Lee, Carbon Neutralization (Q1), Volume 5, Issue 3, e70150 (2026)
•Abstract
We report the defect‐related luminescence properties and non‐powered UV detection capabilities of Sm3+ and Pr3+‐dopedCa2SnO4 (CSO:RE, RE = Sm and Pr) phosphors. Under UV excitation, CSO:RE exhibits distinct orange and deep‐red emissionsdue to characteristic 4f–4 f transitions of RE3+ ions. Comprehensive long‐persistent luminescence (LPL), thermoluminescence(TL), and optically stimulated luminescence (OSL) measurements confirm the presence of thermally and optically responsivetrap states. Notably, our samples demonstrated highly stable OSL signals even after 504 h of storage in a dark environment,evidencing excellent information storage retention. Finally, leveraging these properties, we demonstrate battery‐free UV‐dosedetectors that operate under ambient sunlight and enable optical readout. Our approach requires zero operational energy,avoids battery‐ and wiring e‐waste, and minimizes maintenance. Furthermore, robust oxide host combined with elastomericencapsulation ensures outdoor durability and solid validation on solar‐exposure mapping.