Luminescence properties of blue-emitting Ce3+-doped series of Ca2Al2SiO7 and Sr2Al2SiO7 phosphors

Ce3+-doped series of Ca2Al2SiO7 and Sr2Al2SiO7 are prepared via conventional high-temperature solid-state reaction method and impact of Ce3+ doping on Fracto-mechanoluminescence (ML) and Photoluminescence (PL) properties of Ca2Al2SiO7 and Sr2Al2SiO7 was analyzed. Identification of phase formation was done by XRD. Analysis of PL studies reveals that both phosphors emit broadband in the intense blue region, when excited by near-UV light (356 nm), and for further analysis, the emission band was resolved into two peaks, which was attributed to 2D3/2 → 2F5/2 and 2D3/2 → 2F7/2 transitions of Ce3+ ion. The calculated energy difference between these two peaks was found to be 1979 cm−1 and 2037 cm−1, which were in good agreement with the theoretical energy difference (~ 2000 cm−1). The color purity of prepared phosphors was much better than commercial BAM (BaMgAl10O17: Eu2+) phosphor. ML studies were also performed and effect of radiation dose on ML sensitivity has been studied. Results suggest that synthesized phosphors were applied to damage sensors and display devices.