Visible luminescence in KPb2Cl5:Pr3+ crystal

Balda, Rolindes; Vodâ, M.; Al-Saleh, M.; Fernández, J.

doi:10.1016/s0022-2313(02)00223-5

Cited by 45 publications

(31 citation statements)

References 17 publications

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“…491, 520 and 635 nm upconversion lasers have been realized in Pr 3+ : ZBLAN under infrared laser pump [3] indicating that it is an attractive upconversion laser media. Energy transfer and yellow-toblue frequency upconversion have been studied in Pr 3+ -doped with other materials, including fluorophosphates [4], aluminium fluoride glasses [5] and KPb 2 Cl 5 crystal [6]. These studies are important to realize upconversion laser emission and optimize laser efficiency.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence of Pr3+-, Nd3+- and Ni2+-doped TeO2–ZnO–WO3–TiO2–Na2O glasses

Lakshminarayana

Yang

Qiu

2009

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Photoluminescence of Pr3+-, Nd3+- and Ni2+-doped TeO2–ZnO–WO3–TiO2–Na2O glasses

Lakshminarayana

Yang

Qiu

2009

Journal of Alloys and Compounds

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“…The interest in new solid state materials able to produce laser emission or very intense fluorescence in the ultra violet ͑UV͒/vacuum UV spectral regions, [1][2][3][4][5] act as quantum cutters, [6][7][8] or emit upconverted light, [9][10][11] has resulted in an increase in the number of spectroscopic studies involving 4 f nϪ1 5d 1 electronic states of lanthanide ion impurities in crystals. Also, the idea that the 5 f nϪ1 6d 1 manifolds of the actinide series could have analogous value and potentiality is leading new research on crystals doped with actinide ions.…”

Section: Introductionmentioning

confidence: 99%

Quantum chemical analysis of the bond lengths in fn and fn−1d1 states of Ce3+, Pr3+, Pa4+, and U4+ defects in chloride hosts

Barandiarán¹,

Seijo²

2003

The Journal of Chemical Physics

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It is widely believed that impurity-ligand bond distances in lanthanide ͑Ln͒ and actinide ͑An͒ doped crystals, are larger in the f nϪ1 d 1 energy levels than in the f n ones. This idea, which was not justified and is probably based on the fact that Ln 5d (An 6d) orbitals have a radial extent much larger than Ln 4 f (An 5 f ) orbitals, has been neither confirmed nor rejected experimentally in spite of the fact that a very large number of absorption/emission spectroscopic studies on f -element doped hosts exist, because the band shapes depend on the square of the bond length offsets between initial and final electronic states. Recent quantum chemical calculations on Ln and An impurities in fluoride and chloride cubic hosts, which considered host embedding, dynamic electron correlation, and relativistic spin-free and spin-orbit coupling effects, have shown that impurity-ligand bond distances are classified in three sets according to their configuration, with the following trend:) 1 ͔, in contradiction with the assumed expectations. In this paper we give an interpretation of this, on the basis of a constrained space orbital variation analysis of the chemical bond in states of the f n , f nϪ1 d(t 2g ) 1 , and f nϪ1 d(e g ) 1 configurations of four model systems: Cs 2 NaYCl 6 :Ce 3ϩ , Cs 2 NaYCl 6 :Pr 3ϩ , Cs 2 ZrCl 6 :Pa 4ϩ , and Cs 2 ZrCl 6 :U 4ϩ . The analysis shows that the basic difference between f n and f nϪ1 d 1 configurations regarding bond effects which are responsible for the bond distance is that, in the former, all the open-shell electrons are shielded from the ligands by the 5p (6p) filled shell and the bond length is determined by closed-shell interactions between the outermost Ln 5p 6 (An 6p 6 ) shell and the ligands, whereas in the latter one electron has crossed the 5p (6p) barrier and is much more exposed to bonding interactions with the ligands, at the same time that an internal 4 f (5 f ) hole has been created which induces ligand to Ln ͑An͒ charge transfer, all of it resulting in the shown trends.

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“…The optical spectroscopy and the demonstration of lasing of KPb 2 Cl 5 doped with rare earth ions have been extensively studied [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. However, to the best of our knowledge, there are rare reports on the growth and optical spectroscopy of transition metal doped KPb 2 Cl 5 .…”

Section: Introductionmentioning

confidence: 99%