Patent ID: 7052351

Claim:
A method for forming an organic light-emitting device comprising: a) depositing a first electrode over a substrate; b) depositing a first emissive layer over the first electrode for producing a first colored light in response to hole-electron recombination; c) selectively patternwise depositing a first electron-blocking layer over the first emissive layer; d.1) depositing a second emissive layer over the first electron-blocking layer which in response to hole-electron recombination emits a second colored light different from the first colored light emitted from the first emissive layer; d.2) selectively patternwise depositing a second electron-blocking layer over the second emissive layer; d.3) depositing a third emissive layer over the second electron-blocking layer which in response to a hole-electron recombination emits a third color of light different from the first and second colored lights of first and second emissive layers; e) depositing a second electrode over the third emissive layer; and f) whereby the patternwise deposition of the electron-blocking layers has been selected to substantially shift hole-electron recombination from the first to the second emissive layers and from the second to the third emissive layer.