Luminescent salt

Abstract

a b s t r a c tIn this contribution, we report on the f-f and d-f luminescence of Ce 3+ , Pr 3+ and Nd 3+ in NaCl. The samples were prepared by rapid quenching of a NaCl-melt doped with lanthanides. It is shown that both f-f and d-f emission from lanthanide ions can be observed. Excitation and emission spectra are discussed. In addition to being interesting from a fundamental point of view, it will be argued how the simple alkali halides doped with trivalent lanthanides may be promising as hosts for new scintillator materials.

Luminescence properties of lanthanide doped alkaline earth chlorides under (V)UV and X-ray excitation

“…The materials were synthesized by melting and rapid quenching of the starting materials (anhydrous chlorides) in a glassy carbon crucible in a high frequency furnace, similar to the method reported earlier for sodium chloride [17]. This allows for fast synthesis of simple chemical compositions even in the case of ionic radii and charge mismatch between the dopant and the host lattice cations.…”

Aspects of Pr3+ luminescence in solids

“…The luminescence of GOS is based on the efficient Pr 3 þ intraconfigurational (4f 2 -4f 2 ) emission transition that emanates from the 3 P 0 level [1,2]. Host lattices that support Pr 3 þ 4f 1 5d 1 -4f 2 emission transition can lead to the development of fast scintillators for use in home land security applications and in Positron Emission Tomography (PET) [1][2][3][4][5][6][7][8][9][10][11][12][13]. Other commercial applications of the Pr 3 þ interconfigurational emission transition include the development of germicidal lamps (UVC light emission) [14].…”

Synthesis and luminescent properties of Eu3+- and Eu2+-activated sodium pyrophosphate Na4P2O7

“…Such information seems useful for interpreting the luminescent properties of lanthanide ions in double alkali and alkaline-earth phosphates of general formula M I M II PO 4 , where M I = Li, Na, K and M II = Ca, Sr, Ba [1][2][3]. The compounds NaCaPO 4 :Eu 2+ and LiSrPO 4 :Eu 2+ are known to be promising luminescent materials for white-light-emitting diodes [1,3].…”

“…One of the factors that complicates the interpretation of the luminescent properties of these materials is related to the possible incorporation of lanthanide ions into positions of both alkaline-earth and alkali metals. The luminescent properties of lanthanide ions in alkali-metal compounds were studied only in chlorides [4][5][6] and Li 2 SiO 3 [7]. Therefore, solid solutions Na 4(1-x) Eu 4x P 2 O 7 seem to be a .…”

“…This method for evaluating η is based on the fact that oscillator strengths of 7 F 0 → 5 D 1 (Eu 3+ ) and O(2p) → Eu(4f 6 ) transitions in metal oxides are actually independent of the crystal structure and chemical composition. By comparing experimentally found ratios I( 4f 6 )) for a luminescent material with a known η value and for Na 4 ) with η = 0.85 and CTB maximum at λ = 243 nm was used as a standard [10]. The η value obtained for Eu 3+ in Na 4 P 2 O 7 was exceedingly low, especially if it is recalled that the CTB is located at rather high energies.…”