Patent ID: 8809079

Claim:
A method of forming a microcavity for an organic light-emitting device (OLED), the method comprising: depositing an ink from an inkjet printhead onto a substrate comprising a first reflective electrode, to form a printed layer, the ink being defined by a carrier and dissolved or suspended film-forming organic material; driving off the carrier from the printed layer to form a first organic buffer layer on the substrate, wherein the first organic buffer layer formed using the organic film-forming material exhibits a glass transition temperature range; baking the first organic buffer layer at a bake temperature of from within the glass transition temperature range to above the glass transition temperature range, to form a crystalline organic layer having a conductivity of from about 1.0×10 −9 S/m to about 1.0×10 −1 S/m; depositing a light-emitting organic material over the first organic buffer layer to form an emitting layer such that the first organic buffer layer is disposed between the substrate and the emitting layer, the light-emitting organic material emitting light, upon excitation, at a peak emission wavelength; and depositing a second reflective electrode over the emitting layer such that the emitting layer is disposed between the first reflective electrode and the second reflective electrode, to form an OLED microcavity; wherein at least one of the first and second reflective electrodes is semi-transparent, the first reflective electrode and the second reflective electrode are separated from one another by a distance, the distance corresponds to a depth of the microcavity, and the depth of the microcavity is configured for resonance emission of the peak emission wavelength.