Giesecke & Devrient Gmbh

Giesecke+devrient Currency Technology Gmbh

Stephan Heer

Thomas Giering

Kai Uwe Stock

Gregor Grauvogl

A printed document of value having at least one authenticity feature in the form of a luminescent substance on the basis of host lattices which are doped with one or a plurality of ions. Since the host lattices are doped with different ions, exchange interactions between clusters of ions that occur leads to cooperative effects.

Authenticity mark in the form of a luminescent substance

A printed document of value has an authenticity feature in the form of at least two luminescent substances on the basis of host lattices which are doped with one or a plurality of ions. By systematically changing the host lattices and/or ions of the (nd)electron configuration a specific setting of the luminescence properties of luminescent substances is possible, the combination of which permits a multiplicity of complex new authenticity features.

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Munich, Germany

Stephan Heer