A method for forming a color organic light-emitting device including
depositing a first electrode over a substrate; depositing a first
emissive layer over the first electrode for producing a first colored
light in response to hole-electron recombination; and selectively
patternwise depositing a hole-blocking layer over the first emissive
layer. The method also includes depositing a second emissive layer over
the hole-blocking layer which in response to hole-electron recombination
emits colored light different from the colored light emitted from the
first emissive layer; depositing a second electrode over the second
emissive layer; and whereby the patternwise deposition of the
hole-blocking layer has been selected to substantially shift
hole-electron recombination from the second to the first emissive layers.