Thermoluminescence and near-infrared persistent luminescence in LaAlO3:Mn4+,R (R= Na+, Ca2+, Sr2+, Ba2+) ceramics
Source abstract
Abstract
The near-infrared (NIR) persistent luminescence and thermoluminescence of Mn4+ activated LaAlO3 (LAO) and LAO:Mn4+,R (R= Na+, Ca2+, Sr2+, Ba2+) ceramics were investigated. After irradiation with 335 nm excitation light, deep red and NIR persistent luminescence was obtained in the wavelength region from 650 nm to 750 nm due to the Mn4+ dopants, well within the biological tissue transparency window for in vivo imaging. The afterglow can be attributed to the presence of Mn4+ induced traps in the LAO host. By carrying out a series of thermoluminescence measurements, the formation of a broad range of traps was identified, with two main peaks centered at 0 degrees C and 114 degrees C. Na, Ca2+, Sr2+ or Ba2+ ions were added as co-dopants to optimize the location and energy of the trap levels, improving the NIR persistent luminescence.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Perovskite Materials and Applications · Luminescence and Fluorescent Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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