Band edge emission enhanced organic light emitting diode with a localized emitter
AssigneeRed Bank Technologies LLC
InventorsJohn N. Magno, Gene C. Koch
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Abstract
A light emitting photonic crystal having an organic light emitting diode and methods of making the same are disclosed. An organic light emitting diode disposed within a photonic structure having a band-gap, or stop-band, allows the photonic structure to emit light at wavelengths occurring at the edges of the band-gap. Photonic crystal structures that provide this function may include materials having a refractive index that varies.
Claims20
A light emitting device comprising a single light emitting photonic crystal having an organic electroluminescent emitter material disposed within the single photonic crystal, wherein
- the organic electroluminescent emitter material has a free space emission spectrum that at least in part overlaps a stop-band of the photonic crystal, wherein
- the photonic crystal emits light at a wavelength corresponding to an edge of the stop-band that the organic electroluminescent emitter material overlaps, and wherein the organic electroluminescent emitter material comprises an organic light emitting material localized in a zone having less than 10% of an optical thickness of the photonic crystal.
A light emitting device comprising a single light emitting photonic crystal having an organic electroluminescent emitter material disposed within the single photonic crystal, wherein
- the organic electroluminescent emitter material has a free space emission spectrum that at least in part overlaps a stop-band of the photonic crystal, wherein
- the photonic crystal emits light at a wavelength corresponding to an edge of the stop-band that the organic electroluminescent emitter material overlaps, wherein the edge of the stop-band occurs at a wavelength at which measured radiance of free space luminescent light emission by the organic electroluminescent emitter material is greater than one-quarter of the peak radiance of the free space luminescent emission spectrum of the emitter material.
Dependencies are inferred from the claim text.