Light emitting diode
AssigneeNederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
InventorsHarmannus Schoo, Hermanus Hendricus Bekman, Jacobus Van Veen
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Abstract
The invention relates to a light emitting diode having at least one (semi)conductive electroluminescent active layer which comprises at least two different electroluminescent functionalities, wherein the emission spectrum of the diode exhibits at least two intensity maxima. The invention further relates to a detector which comprises a light emitting diode which is capable of emitting light at least two mutually separate intensity maxima.
Claims21
1-21. (canceled)
A detection system comprising a light emitting diode (LED) having at least one (semi)conductive electroluminescent active layer which comprises at least two different electroluminescent functionalities, wherein the emission spectrum of the diode exhibits at least two intensity maxima and wherein the active layer comprises at least one electroluminescent organic compound.
A light emitting diode having at least one (semi)conductive electroluminescent active layer which comprises at least two different electroluminescent functionalities, wherein the emission spectrum of the diode exhibits at least two intensity maxima, wherein the LED comprises an electroluminescent polymer and an electroluminescent single dye.
A light emitting diode having at least one (semi)conductive electroluminescent active layer which comprises at least two different electroluminescent functionalities, wherein the emission spectrum of the diode exhibits at least two intensity maxima, wherein the LED comprises a polyfluorene, which may be a polyfluorene copolymer and/or a polyfluorene derivatised with an electroluminescent dye.
A light emitting diode having at least one (semi)conductive electroluminescent active layer which comprises at least two different electroluminescent functionalities, wherein the emission spectrum of the diode exhibits at least two intensity maxima, wherein the LED comprises a filter, preferably a filter with notch filter properties, which filter selectively has at least a reduced transmission of light of a wavelength between two consecutive intensity maxima.
A method for manufacturing a light emitting diode comprising:
- providing at least one (semi)conductive electroluminescent active layer which comprises at least two different electroluminescent functionalities, wherein the emission spectrum of the light emitting diode exhibits at least two intensity maxima;
- and
- applying at least one active layer to an electrode, which active layer comprises at least one electroluminescent compound as defined in claim 1.
Dependencies are inferred from the claim text.