Spectroscopic Study of Eu3+-Doped Magnesium Lanthanum Phosphate (MLPO) Films on SiO2 Substrate

The distinctive optical band gap and photoluminescence of sol-gel Eu3+-doped magnesium lanthanum phosphate thin films on quartz (SiO2) substrate were successfully investigated. Effects of Eu3+ on the various spectroscopic parameters, including FTIR, transmittance, absorption coefficient, optical energy gap, refractive index, dielectric constant, and luminescence were explored. FT-IR measurements are achieved for the undoped and Eu3+-doped films which reinforce the excess oxygens from the MgO, La2O3, and Eu2O3 oxide supports the formation of MLPO and Eu-doped MLPO groups in the tetrahedral phosphate network. The transmittances, reflectance, refractive index, and dielectric constant show a decreasing behavior with increasing the Eu content in the MLP matrix while the absorption coefficient and energy gap show an increase. The emission spectra of Eu-doped MgO:La2O3:P2O5 shows the characteristic electronic transitions of Eu3+ ions in phosphorous-based films.

Automated summary

The study successfully investigated the distinctive optical properties of sol-gel Eu3+-doped magnesium lanthanum phosphate thin films, revealing the effects of Eu3+ on various spectroscopic parameters.