Karl Krämer

Overview

Best Publications

• Hexagonal Sodium Yttrium Fluoride Based Green and Blue Emitting Upconversion Phosphors

  Karl Krämer;Daniel Biner;Gabriela Claudia Frei;Hans-Ulrich Güdel

  1395
  Citations

• Novel materials doped with trivalent lanthanides and transition metal ions showing near-infrared to visible photon upconversion

  J.F. Suyver;A. Aebischer;Daniel Biner;P. Gerner

  876
  Citations

• Upconversion spectroscopy and properties of NaYF4 doped with Er3+, Tm3+ and/or Yb3+

  J.F. Suyver;J. Grimm;M.K. van Veen;D. Biner

  855
  Citations

• Application of NaYF 4 : Er 3 + up-converting phosphors for enhanced near-infrared silicon solar cell response

  A. Shalav;B. S. Richards;T. Trupke;Karl Krämer

  824
  Citations

• High-energy-resolution scintillator: Ce3+ activated LaBr3

  E. V. D. van Loef;P. Dorenbos;C. W. E. van Eijk;Karl Krämer

  783
  Citations

• Bose–Einstein condensation of the triplet states in the magnetic insulator TlCuCl3

  Ch. Rüegg;N. Cavadini;A. Furrer;Hans-Ulrich Güdel

  518
  Citations

• 50th anniversary of the Judd–Ofelt theory: An experimentalist's view of the formalism and its application

  Markus P. Hehlen;Mikhail G. Brik;Karl W. Krämer

  473
  Citations

• Scintillation properties of LaBr3:Ce3+ crystals: fast, efficient and high-energy-resolution scintillators

  E.V.D van Loef;P Dorenbos;C.W.E van Eijk;K.W Krämer

  440
  Citations

• Highly efficient near-infrared to visible up-conversion process in

  J.F. Suyver;J. Grimm;Karl Krämer;Hans-Ulrich Güdel

  394
  Citations

• Enhancement of silicon solar cell efficiency by upconversion: Optical and electrical characterization

  S. Fischer;J. C. Goldschmidt;P. Löper;G. H. Bauer

  311
  Citations

• Optical and scintillation properties of pure and Ce3+-doped Cs2LiYCl6 and Li3YCl6 : Ce3+ crystals

  C.M. Combes;P. Dorenbos;C.W.E. van Eijk;K.W. Krämer

  302
  Citations

• Structural and Spectroscopic Characterization of Active Sites in a Family of Light-Emitting Sodium Lanthanide Tetrafluorides

  Annina Aebischer;Marc Hostettler;Jürg Hauser;Karl Krämer

  299
  Citations

• Origin of the High Upconversion Green Luminescence Efficiency in β-NaYF4:2%Er3+,20%Yb3+

  C. Renero-Lecuna;R. Martín-Rodríguez;R. Valiente;J. González

  294
  Citations

• Efficient visible to infrared quantum cutting through downconversion with the Er3+–Yb3+ couple in Cs3Y2Br9

  J. J. Eilers;D. Biner;J. T. van Wijngaarden;K. Krämer

  258
  Citations

• Development and characterization of highly efficient new cerium doped rare earth halide scintillator materials

  K. W. Krämer;P. Dorenbos;H. U. Güdel;C. W. E. van Eijk

  218
  Citations

• Optical and scintillation properties of cerium-doped LaCl3, LuBr3 and LuCl3

  O. Guillot-Noël;J.T.M. de Haas;P. Dorenbos;C.W.E. van Eijk

  210
  Citations

• Highly Efficient IR to NIR Upconversion in Gd2O2S: Er3+ for Photovoltaic Applications

  Rosa Martín-Rodríguez;Stefan Fischer;Aruna Ivaturi;Benjamin Froehlich

  209
  Citations

• Improvement of γ-ray energy resolution of LaBr3:Ce3+ scintillation detectors by Sr2+ and Ca2+ co-doping

  M. S. Alekhin;J. T. M. de Haas;I. V. Khodyuk;Karl W. Krämer

  198
  Citations

• Scintillation and spectroscopy of the pure and Ce3+-doped elpasolites: Cs2LiYX6 (X = Cl, Br)

  E V D van Loef;P Dorenbos;C W E van Eijk;K W Krämer

  191
  Citations

• Quantum and classical criticality in a dimerized quantum antiferromagnet

  P. Merchant;B. Normand;Karl Krämer;M. Boehm

  182
  Citations

• Scintillation properties of LaCl/sub 3/:Ce/sup 3+/ crystals: fast, efficient, and high-energy resolution scintillators

  E.V.D. van Loef;L.P. Dorenbos;C.W.E. van Eijk;K. Kramer

  164
  Citations

• Visible light emission upon near-infrared excitation in a transparent solution of nanocrystalline β-NaGdF4: Yb3+, Er3+

  Annina Aebischer;Stephan Heer;Daniel Biner;Karl Krämer

  152
  Citations

• Photoinduced Nitrosyl Linkage Isomers Uncover a Variety of Unconventional Photorefractive Media

  Dominik Schaniel;Dominik Schaniel;Mirco Imlau;Thomas Weisemoeller;Theo Woike

  135
  Citations

• Plasmon enhanced upconversion luminescence near gold nanoparticles–simulation and analysis of the interactions

  Stefan Fischer;Florian Hallermann;Toni Eichelkraut;Gero von Plessen

  133
  Citations

• Level location and spectroscopy of Ce3+, Pr3+, Er3+, and Eu2+ in LaBr3

  P. Dorenbos;E.V.D. van Loef;A.P. Vink;E. van der Kolk

  116
  Citations

• Scintillation Properties of and Self Absorption in ${ m SrI}_{2}\!:\!{ m Eu}^{2+}$

  M. S. Alekhin;J. T. M. de Haas;K. W. Kramer;P. Dorenbos

  115
  Citations