Luminescence in Rare Earth Ion‐Doped Oxide Compounds

Abstract

This chapter focuses on the study on luminescent materials, which consist of oxide compounds (host material) and rare earth ions (as the activator) in the valence state, mostly 3+. The first part begins with a background study about the luminescence phenomenon, its stages, and the configurational coordinate diagram. Then, we review the notation often used for rare earth ions, such as the term symbols associated with the energy levels of the ground state. Lastly on the first part, we establish a relationship between the configurational coordinate model and the electronic transitions of such ions. The second part shows the photoluminescence results in some oxide compound materials doped with rare earth ions that have been reported in research articles with potential applications.

Plasmon-enhanced photoluminescence from TiO2 and TeO2 thin films doped by Eu3+ for optoelectronic applications

“…Although Eu usually assumes a trivalent oxidation state (Eu 3+ ), the divalent state (Eu 2+ ) is also stable, but characterized by different luminescent properties. The Eu 3+ emission spectrum consists of sharp lines, which are ascribed to 5 D 0 → 7 F J ( J = 0–6) transitions (intra-configurational 4f transitions), observed in the range of 570–840 nm [ 21 – 23 ]. As a red light emitter, Eu 3+ may be employed in various optical devices.…”

Full Spectral Range Raman Signatures Related to Changes in Enameling Technologies from the 18th to the 20th Century: Guidelines, Effectiveness and Limitations of the Raman Analysis

“…Rare earth ions having unfilled f-orbitals exhibit luminescence with f-f and f-d electronic transitions when excited with appropriate energies [43,[56][57][58][59]. When this occurs, a specific signal is measured by the spectrometer provided that the grating allows for collection of the light at the emitted wavelength and the integration time is long enough when pulsed laser source is used.…”

Enhancing the Relative Sensitivity of V5+, V4+ and V3+ Based Luminescent Thermometer by the Optimization of the Stoichiometry of Y3Al5−xGaxO12 Nanocrystals

“…[1,2,3,4]. Their optical properties may be in a facile way modified by the introduction of the appropriate optically active ions like lanthanide (Ln 3+ ) and/or transition metals (TM) ions [5,6,7,8,9,10,11,12,13] to the host material. Besides unique chemical and physical features, they reveal size- and shape-dependent spectroscopic properties, which are not observed for organic-based nanomaterials [1].…”