Year: 2025
Type: article
Abstract: Near‐infrared mechanoluminescence (NIR ML) materials, owing to the unique force‐to‐light conversion characteristics, have attracted considerable attention, such as in bioimaging and structural health monitoring fields. However, current NIR ML materials are limited to a restricted selection of activators, which significantly hinders their practical applications. Herein, a series of Fe 3+ ‐activated double perovskite broadband emission NIR MLs are prepared (A 2 BB'O 6 :Fe 3+ ). Among them, Sr 2 ScSbO 6 :Fe 3+ has broadband NIR ML covering 800–1000 nm at a low activation threshold ≈1 N, while maintaining strong emission and reasonably stable cycling performance even at 573 K. Thermoluminescence measurements and density‐functional‐theory calculations identify the defect type and distribution of Sr 2 ScSbO 6 :Fe 3+ . The host exhibits a continuous distribution of shallow‐to‐deep defects (0.02–0.97 eV). These defects efficiently quench persistent luminescence and ambient‐light interference, enabling a robust NIR ML noise‐signal ratio. In addition, such NIR ML emission has bio tissue penetration ability, showing potential bio stress‐related application imaging prospects.
Source: Advanced Optical Materials
Institutions: South China Normal University, Guangdong Polytechnic Normal University, State Administration for Market Regulation, Jiangxi University of Science and Technology, South China University of Technology, State Key Laboratory of Luminescent Materials and Devices, Central South University, State Key Laboratory of Powder Metallurgy, University of Hong Kong
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,880
Awards: G2276876992, G5432844874
OpenAlex ID: W7117369759