A perovskite-like LaSrGaO4:Mn2+, Nd3+, Yb3+ NIR luminescent material for fluorescent temperature sensor

Abstract

A NIR phosphor of the Mn2+, Nd3+, Yb3+ ions doped perovskite-like host LaSrGaO4 is successfully synthesized by high temperature solid phase method, and the energy transfer process about them is analyzed in detail. By measuring the temperature spectra of different samples and calculating the temperature sensitivities, it is found that the temperature sensitivity can be improved by adding Mn2+ and Yb3+ into LaSrGaO4:Nd3+, and that the maximum absolute sensitivity can be 5.64321%/K and that the relative sensitivity can be maintained at 0.474%/K. This NIR luminescent material LaSrGaO4:Mn2+, Nd3+, Yb3+ can be used as the NIR fluorescent temperature sensor for biological detection. In addition, the wide excitation bands of Mn2+, Nd3+ in visible region match well with the solar spectrum (AM 1.5), and the wide emission bands of Nd3+, Yb3+ in near infrared 900–1100 nm region are located in the spectral response curve of c-Si solar cells, so NIR luminescent material LaSrGaO4:Mn2+, Nd3+, Yb3+ may have the potential application in the spectral converter of c-Si solar cells to improve the conversion efficiency.