首页|Multimodal deep red luminescent ratiometric thermometer of LaAlO3 doped with Mn4+
Multimodal deep red luminescent ratiometric thermometer of LaAlO3 doped with Mn4+
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NSTL
Elsevier
Mn4+ ions show red to deep-red luminescence due to the E-2 ->(4)A(2) spin-forbidden transitions in several host materials. Especially, Mn4+-doped LaAlO3 with perovskite structure shows the deep red luminescence with a quite long wavelength around 730 nm in the first biological window. In this study, we investigated the temperature dependence of the photoluminescence spectra of Mn4+-Ca2+ co-doped LaAlO3 (LAP: Mn4+-Ca2+) and a possibility as a thermometer based on the energy shift of zero-phonon-line (ZPL) and the luminescence intensity ratio (LIR) of thermally coupled ZPL and anti-Stokes phonon sideband (PSB). As a result, the LAP: Mn4+-Ca2+ phosphor shows the continuous energy shift of ZPL with temperature and three different temperature dependences of the LIR by selecting different two luminescence bands, which means that the LAP: Mn4+-Ca2+ phosphor has four different thermometric functions in one phosphor. All the thermometers show a good relative sensitivity and wide working temperature range from 100 K to physiological temperature.
NSTL
Elsevier
