Akademik Veri Yönetim Sistemi
Optical Materials, cilt.166, 2025 (SCI-Expanded, Scopus)
Rare earth (RE3+)-doped inorganic oxides are promising materials for advanced photonic applications due to their remarkable optical properties and multicolor emission capabilities under ultraviolet (UV) or infrared (IR) excitation. These properties make them suitable for use in displays, white light-emitting diodes (LEDs), solar energy devices, and biological labeling. In this study, a series of CdNb2O6-based phosphors doped with Eu3+, Er3+, and Yb3+ ions—specifically CdNb2O6:xEu3+, yEr3+ and CdNb2O6:xEu3+, yEr3+, zYb3+ (x = 0.5–5 mol%, y = 2 mol%, z = 2 mol%)—were successfully synthesized using the molten salt method. X-ray diffraction (XRD) analysis confirmed a single-phase orthorhombic columbite structure in all compositions up to 5 mol% Eu3+ doping. Scanning electron microscopy (SEM) revealed a noticeable reduction in grain size with increased Eu3+ concentration, especially in the Yb3+ co-doped samples. Photoluminescence analysis showed strong red and green emissions from Eu3+ and Er3+, respectively, under 464 nm and 378 nm excitation wavelengths. An increase in Eu3+ content enhanced red emission while diminishing green emission, indicating tunable chromatic output. Color coordinates (CIE) under UV light further supported the emission adjustability from green to red. Additionally, enhanced 4I13/2 transitions in Yb3+-co-doped samples indicated effective energy absorption at the 4I11/2 level near 980 nm, highlighting the host's suitability for IR-responsive applications. Notably, the synthesized phosphors demonstrated strong potential for latent fingerprint (LFP) detection, enabling clear visualization of intricate fingerprint patterns essential for forensic investigations. These findings underscore the multifunctionality and practical relevance of CdNb2O6-based RE3+-doped phosphors in optical and security-related technologies.