Abstract
A series of La2MgTiO6: Mn4+ and La2MgTiO6: Mn4+, Eu3+ phosphors were prepared by high-temperature solid-phase method. The emission spectra of La2MgTiO6: Mn4+, Eu3+ phosphor samples under 328 nm excitation overlap with the absorbing regions of plant phytochromes PR and PFR in the far red and near infrared double wavelength range. The temperature-dependent and wavelength-dependent emission spectra show that the two distinguishable emission peaks of Eu3+ and Mn4+ exhibit clearly different temperature and wavelength responses. Thus, dual-emission optical sensing based on changes in the fluorescence intensity ratio(FIR) of Mn4+ and Eu3+ ions, the relative sensitivity of wavelength detection in the range of 288–348 nm maxima is 8.13% nm−1 at 288 nm, and relative sensitivity of optical temperature sensing in the range of 298–498 K maxima is 2.09% K−1 at 498 K, In this study, La2MgTiO6: Mn4+, Eu3+ phosphor samples with very promising optical properties can provide the possibility of application in multiple fields.
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