Birthdate: 6^th December 1974, Belp (Bern, Switzerland)  

2001:  Diploma (Master of Science) in Chemistry at the University of Bern, Switzerland.
Dipoloma thesis: Upconversion studies of the systems YGG and YAG codoped with Cr³⁺ and Yb³⁺. Advisor: Prof. H. U. Güdel  

Synthesis and spectroscopy of upconverting nanoparticles  

S. Heer, M. Wermuth, K. Krämer and H. U. Güdel
Upconversion excitation of Cr^{3+ 2}E emission in Y₃Ga₅O₁₂ codoped with Cr³⁺ and Yb³⁺
Chem. Phys. Lett. 334, 293-297 (2001)      Abstract     

Ralph Schenker, Stephan Heer, Høgni Weihe and Hans U. Güdel
Optical Dimer Excitations and Exchange Parameters in (Et₄N)₃Cr₂F₉: 
First Observation of the ⁴A₂ ²A₁ Transition
Inorg. Chem. 40, 1482-1488 (2001)      Abstract     

Pascal Gerner, Stephan Heer, Christine Reinhard, Rafael Valiente, Oliver S. Wenger and Hans U. Güdel
New Light Emission Processes in Inorganic Materials
Chimia 55, 1021-1024 (2001)      Abstract     

S. Heer, M. Wermuth, K. Krämer, D. Ehrentraut and H. U. Güdel
Up-conversion excitation of sharp Cr^{3+ 2}E emission in YGG and YAG codoped with Cr³⁺ and Yb³⁺
J. Lumin. 94-95, 337-341 (2001)      Abstract     

S. Heer, M. Wermuth, K. Krämer and H. U. Güdel
Sharp ²E upconversion luminescence of Cr³⁺ in Y₃Ga₅O₁₂ codoped with Cr³⁺ and Yb³⁺
Phys. Rev. B 65, 125112/1-10 (2002)      Abstract     

S. Heer, K. Petermann and H. U. Güdel
Upconversion excitation of Cr³⁺ emission in YAlO₃ codoped with Cr³⁺ and Yb³⁺
J. Lumin. 102-103, 144-150 (2003)      Abstract     

Stephan Heer, Olaf Lehmann, Markus Haase and Hans-Ulrich Güdel
Blue, Green, and Red Upconversion Emission from Lanthanide-Doped LuPO₄ and YbPO₄ Nanocrystals in a Transparent Colloidal Solution
Angew. Chem. Int. Ed. 42, 3179-3182 (2003)      Abstract     
Angew. Chem. 115, 3288-3291 (2003)      Abstract     

Stephan Heer, Karsten Kömpe, Hans-Ulrich Güdel and Markus Haase
Highly Efficient Multicolour Upconversion Emission in Transparent Colloids of Lanthanide-Doped NaYF₄ Nanocrystals
Adv. Mater. 16, 2102-2105 (2004)      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     

Annina Aebischer, Stephan Heer, Daniel Biner, Karl Krämer, Markus Haase and Hans U. Güdel
Visible light emission upon near-infrared excitation in a transparent solution of nanocrystalline b-NaGdF₄: Yb³⁺, Er³⁺
Chem. Phys. Lett. 407, 124-128 (2005)      Abstract     

Ana Maria Pires, Osvaldo Antonio Serra, Stephan Heer and Hans Ulrich Güdel
Low-temperature upconversion spectroscopy of nanosized Y₂O₃:Er,Yb phosphor
J. Appl. Phys. 98, 063529/1-7 (2005)      Abstract     

Ana Maria Pires, Stephan Heer, Hans Ulrich Güdel and Osvaldo Antonio Serra
Er, Yb Doped Yttrium Based Nanosized Phosphors: Particle Size, "Host Lattice" and Doping Ion Concentration Effects on Upconversion Efficiency
J. Fluoresc. 16, 461-468 (2006)      Abstract     

Visit Stephan Heer's website at: http://www.flora-stephan.com