Reduction or elimination of color change with viewing angle for microcavity devices

A method to fabricate a microcavity OLED device that minimizes or eliminates color change at different viewing angles, comprising:

• forming a multi-layer mirror on a substrate, wherein said multi-layer mirror is comprised of a plurality of layers, each of said plurality of layers is comprised of a non-absorbing material;
• forming a first electrode on said multi-layer mirror, wherein said first electrode is substantially transparent;
• forming an emissive layer on said first electrode;
• and
• forming a second electrode on said emissive layer, wherein said second electrode is a mirror,
• wherein said multi-layer mirror and said second electrode form a microcavity that amplifies a particular wavelength that is in resonance with an optical length of said microcavity, and
• wherein said emissive layer is comprised of a material that has an emission spectrum with no luminance components with significant intensity at wavelengths shorter than a wavelength at which a color change begins to occur.

A top-emitting microcavity OLED device that minimizes or eliminates color change at different viewing angles, comprising:

• a substrate;
• a first electrode on said substrate, wherein said first electrode is a mirror;
• an emissive layer on said first electrode;
• and
• a second electrode on said emissive layer, wherein said second electrode is substantially transparent;
• and
• a multi-layer mirror on said second electrode, wherein said multi-layer mirror is comprised of a plurality of layers, each of said plurality of layers is comprised of a non-absorbing material,
• wherein said first electrode and said multi-layer mirror form a microcavity that amplifies a particular wavelength that is in resonance with an optical length of said microcavity, and
• wherein said emissive layer is comprised of a material that has an emission spectrum with no luminance components with significant intensity at wavelengths shorter than a wavelength at which a color change begins to occur.