The present application discloses a display panel comprising a light emitting region comprising a plurality of light emitting units. Each of the plurality of light emitting units comprising a first sub-pixel comprising a first emissive layer of a first light emitting material for emitting light of a first color; a second sub-pixel comprising a second emissive layer of a second light emitting material for emitting light of a second color; and a third sub-pixel comprising a third emissive layer comprising the first light emitting material and the second light emitting material in vertical stack.