Patent ID: 7710017

Claim:
A device comprising: an anode; a cathode; and an organic emissive layer disposed between the anode and the cathode, wherein: the anode and the cathode define a microcavity; one of the anode or the cathode, or both, have a reflectance of at least 55% for light over the visible spectrum and a transmission of at most 45% for light over the visible spectrum; there are no electrodes between the anode and the cathode; the device transmits 30-100% of light at a resonant wavelength of the microcavity; the device transmits 0-30% of light at least one wavelength in the visible region not equal to a resonant wavelength of the microcavity; and the spectrum of light emitted by the device has a peak with a full-width at half-maximum of 60 nm or less.