ELECTRO-OPTICAL SECURITY ELEMENT
First Claim
1. A security element for a security and/or valuable document, comprising a matrix based on an organic polymeric material, at least one electrically conductive pigment dispersed in the matrix, and at least one organic light-emitting semiconductor dispersed in the matrix, which semiconductor is capable, in the presence of the conductive pigment, of non-contact excitation of light emission, and the particle size of which is less than 200 nm, wherein the organic light-emitting semiconductor is not encapsulated, and is directly surrounded by the matrix and is embedded therein.
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Abstract
The invention relates to a security element for a security and/or valuable document, comprising a matrix based on an organic polymeric material, at least one electrically conductive pigment dispersed in the matrix, and at least one organic luminescent substance dispersed in the matrix, which luminescent substance is capable, in the presence of the conductive pigment, of non-contact excitation of light emission, and the particle size of which is less than 200 nm, wherein the luminescent substance is not encapsulated, and is directly surrounded by the matrix and is embedded therein, and to uses of such a security and/or valuable document and to security and/or valuable documents produced by such uses.
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Citations
13 Claims
- 1. A security element for a security and/or valuable document, comprising a matrix based on an organic polymeric material, at least one electrically conductive pigment dispersed in the matrix, and at least one organic light-emitting semiconductor dispersed in the matrix, which semiconductor is capable, in the presence of the conductive pigment, of non-contact excitation of light emission, and the particle size of which is less than 200 nm, wherein the organic light-emitting semiconductor is not encapsulated, and is directly surrounded by the matrix and is embedded therein.
Specification