Patterning the emission colour in top-emissive OLEDs
AssigneeNederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
InventorsDorothee Christine Hermes, Joanne Sarah Wilson, Petrus Alexander Rensing
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Abstract
The invention relates to a top-emissive organic light-emitting diode (OLED) (10) arranged to emit light having different emission colors, comprising a multi-layered structure provided with a first electrode, a second electrode and a functional layer enabling light emission disposed between the first electrode and the second electrode, wherein thickness (H1, H2) of the functional layer is modulated by allowing at least a portion of the functional layer to interact with a thickness modulator (5a, 5b, 5c), wherein the functional layer comprises a hole injection layer or the electron injection layer.
Claims12
A top-emissive organic light-emitting diode (OLED) arranged to emit light having different emission colours, comprising a multi-layered structure provided with a first electrode, a second electrode and a functional layer capable of light emission disposed between the first electrode and the second electrode, wherein thickness of the functional layer is modulated by allowing at least a portion of the functional layer to interact with a thickness modulator, wherein the said portion of the functional layer comprises a hole injection layer or an electron injection layer, wherein the thickness modulator comprises a layer provided with a plurality of wells having different lateral dimensions directly beneath the functional layer and wherein thickness modulation of the functional layer is achieved by a different level of well filling for wells of different dimensions due to wetting properties.
A method of manufacturing a top-emissive organic light-emitting diode (OLED) arranged to emit light having different colours, the method comprising the steps of:
- providing a first electrode layer on a substrate;
- providing a thickness modulator comprising a layer provided with a plurality of wells having different lateral dimensions;
- depositing a layer of material forming a part of a light-emitting functional layer of the OLED, wherein thickness modulation of the functional layer is achieved by a different level of well filling for wells of different dimensions due to wetting properties directly beneath the functional layer, and wherein for the functional layer a hole injection layer or an electron injection layer is selected;
- and
- depositing a second electrode layer on said functional layer.
Dependencies are inferred from the claim text.