The 4f-5d luminescence transitions in cerium-doped LuF₃

Nanomaterial Host Bands Effect on the Photoluminescence Properties of Ce‐Doped YAG Nanophosphor Synthesized by Sol‐Gel Method

“…It is well known that the 5d electron experiences much stronger interactions with the crystal field than does the 4f electron because of the large radial extension of the 5d orbitals. Furthermore, the 4f-5d excitation and emission bands are widely vibronic in character; consequently, the decomposition of emission and excitation spectra into a sum of Gaussian curves is justified [37]. In addition, we note that energy 5d levels positions remain as the grain size increases, despite the blue shift observed in emission spectra.…”

Two Series of Lanthanide Coordination Polymers and Complexes with 4′‐Phenylterpyridine and their Luminescence Properties

“…This band originates from 5d–4f transitions of the Ce 3+ . Both ligand and Ce 3+ emission have excitation below 300 nm, which corresponds to 4f–5d excitation of the metal ion,, meaning that energy can also be transferred from Ce 3+ to the ligand. However, the emission intensity of 1‐Ce is low and cannot be observed by a naked eye; it can be detected only by the photoluminescence spectrometer – which is a result of Ce 3+ and ligand energy levels close position and, therefore, quenching of the luminescence by forth and back energy transfer.…”

Structural, Morphological and Photoluminescence Spectroscopy Studies of Intense Blue Ce\(^{3+}\)-doped Lutetium Oxyorthosilicate Scintillator Nanomaterials

“…As shown in Figure 1, the first endothermic peaks observed in the 140-203 • C temperature range are attributed to the elimination of adsorbed species, such as water or alcohol molecules [8].…”