Holger Winkler
Merck & Co.
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Featured researches published by Holger Winkler.
Zeitschrift Fur Kristallographie | 2005
Isabel Kinski; Florian Maurer; Holger Winkler; Ralf Riedel
Abstract For the growth of group-III nitride thin films as well as GaN and AlN bulk phases precursors are widely used. Here, we introduce bulk phases of pure GaN, InN and solid solutions of InxGa1–xN synthesized by pyrolysis of molecular precursors in ammonia atmosphere. The dimeric [M(NMe2)3]2 (M = Al, Ga) is an oftentimes discussed precursor for conversion into group-III nitrides, while the other here presented gallium and indium amide derivatives have not been reported as appropriate precursors in literature so far. The given molecular structure of the precursors lead to a homogeneous distribution of Gallium and Indium on the cation positions in the solid solutions. GaN and InN and their solid solutions crystallizing in the wurtzite structure type follow Vegard’s law and therefore the lattice constant a0 gives a hint about the degree of cations substitution in the structure. For the investigations of the synthesized bulk phases XRD, SEM and TEM coupled with EDX were used.
Archive | 2003
Holger Winkler; Guenther Vulpius; Tilmann Ruhl; Goetz P. Hellmann; Harald Doerr
Archive | 2005
Holger Winkler; Stefan Horstmann; Christoph Schmidt
Archive | 2005
Holger Winkler; Josef Dr. Bauer; René Schneider; Corinna Weigandt; Joachim Heyne; Hans Goerlitzer; Dorothea Staschik; Christian Golditz
Archive | 2008
Holger Winkler; Tim Vosgroene; Thomas Juestel; Stephanie Moeller
Archive | 2007
Holger Winkler
Archive | 2009
Holger Winkler; Thomas Juestel; Julian Plewa
Archive | 2008
Holger Winkler
Archive | 2007
Holger Winkler; Klaus Ambrosius; Ralf Petry
Archive | 2008
Holger Winkler; Reinhold Rueger