J. Fleniken, J. Wang, J. Grimm, M. J. Weber, U. Happek
Thermally stimulated luminescence excitation spectroscopy (TSLES):
A versatile technique to study electron transfer processes in solids
J. Lumin. 94-95, 465-469 (2001)

Judith Grimm, Oliver S. Wenger and Hans U. Güdel
Broadband green upconversion luminescence of Ni²⁺ in KZnF₃
J. Lumin. 102-103, 380-385 (2003)      Abstract     

J. F. Suyver, A. Aebischer, D. Biner, P. Gerner, J. Grimm, S. Heer, K. W. Krämer, C. Reinhard and H. U. Güdel
Novel materials doped with trivalent lanthanides and transition metal ions showing near-infrared to visible photon upconversion
Opt. Mater. 27, 1111-1130 (2005)      Abstract     

Judith Grimm and Hans U. Güdel
Five different types of spontaneous emission simultaneously observed in Tm²⁺ doped CsCaBr₃
Chem. Phys. Lett. 404, 40-43 (2005)      Abstract     

J. F. Suyver, J. Grimm, K. W. Krämer and H. U. Güdel
Highly efficient near-infrared to visible up-conversion process in NaYF₄:Er³⁺,Yb³⁺
J. Lumin. 114, 53-59 (2005)      Abstract     

Eva Beurer, Judith Grimm, Pascal Gerner and Hans U. Güdel
New Type of Near-Infrared to Visible Photon Upconversion in Tm²⁺-Doped CsCaI₃
J. Am. Chem. Soc. 128, 3110-3111 (2006)      Abstract     

Judith Grimm, J. Freek Suyver, Eva Beurer, Graham Carver and Hans U. Güdel
Light-Emission and Excited-State Dynamics in Tm²⁺ Doped CsCaCl₃, CsCaBr₃, and CsCaI₃
J. Phys. Chem. B 110, 2093-2101 (2006)      Abstract     

J. F. Suyver, J. Grimm, M. K. van Veen, D. Biner, K. W. Krämer and H. U. Güdel
Upconversion spectroscopy and properties of NaYF₄ doped with Er³⁺, Tm³⁺ and/or Yb³⁺
J. Lumin. 117, 1-12 (2006)      Abstract     

Eva Beurer, Judith Grimm, Pascal Gerner and Hans U. Güdel
Absorption, Light Emission, and Upconversion Properties of Tm²⁺-Doped CsCaI₃ and RbCaI₃
Inorg. Chem. 45, 9901-9906 (2006)      Abstract     

Judith Grimm, Eva Beurer and Hans U. Güdel
Crystal Absorption Spectra in the Region of 4f-4f and 4f-5d Excitations in Tm²⁺-Doped CsCaCl₃, CsCaBr₃, and CsCaI₃
Inorg. Chem. 45, 10905-10908 (2006)      Abstract     

J. Grimm, E. Beurer, P. Gerner and H. U. Güdel
Upconversion Between 4f-5d Excited States in Tm²⁺-Doped CsCaCl₃, CsCaBr₃, and CsCaI₃
Chem. Eur. J. 13, 1152-1157 (2007)      Abstract     

J. Grimm, J. Fleniken, K. W. Krämer, D. Biner, U. Happek and H. U. Güdel
On the determination of photoionization thresholds of Ce³⁺ doped Cs₃LuCl₆, Cs₂LiLuCl₆ and Cs₂LiYCl₆ by thermoluminescence
J. Lumin. 122-123, 325-328 (2007)      Abstract     

J. Grimm, O. S. Wenger, K. W. Krämer and H. U. Güdel
4f–4f and 4f–5d excited states and luminescence properties of Tm²⁺- doped CaF₂, CaCl₂, SrCl₂ and BaCl₂
J. Lumin. 126, 590-596 (2007)      Abstract