Spectroscopy and energy level location of the trivalent lanthanides in LiYP4O12

• Published in: Journal of luminescence Vol. 131; no. 4; pp. 633 - 639
• Main Authors: Dorenbos, P., Shalapska, T., Stryganyuk, G., Gektin, A., Voloshinovskii, A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-04-2011; Elsevier
• Subjects: 4f–5d transitions; Charge transfer; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Lanthanides; Level locations; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other solid inorganic materials; Photoluminescence; Physics; Charge transfer; Lanthanides; 4f–5d transitions; Level locations; Doping; Photoluminescence; Lithium Yttrium Phosphates Mixed; Energy-level transitions; Valence; 4f―5d transitions; Excitation spectrum; Rare earth additions; Extreme ultraviolet radiation; Impurity states
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2010.11.005

The excitation and emission properties of the lanthanides Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Tb3+, Er3+, Tm3+, and Yb3+ in LiYP4O12 were studied by vacuum ultra-violet spectroscopy at 10K. It provides information on the energies of 4f–5d excitation and emission bands. In the case of Er3+ spin forbidden emission was observed. Charge transfer excitation bands were identified for Eu3+, Sm3+, Tm3+, and Yb3+, and in the case of Yb3+ charge transfer luminescence is observed. All data appear to be consistent with each other and have been used to construct a level scheme showing the location of the energy levels of all trivalent and divalent lanthanides in LiYP4O12.
► The spectroscopy of most of the trivalent lanthanides in LiYP4O12 is presented for the first time. ► Charge transfer luminescence of Yb3+ is reported. ► We demonstrate that the energy of the first 4f–5d transition and the charge transfer band agree with predictive models. ► For the first time a scheme with the location of all lanthanide states (divalent and trivalent ) w.r.t. de-valence and conduction band of LIP4O12 is presented.