Patent ID: 8466452

Claim:
A color unit comprising: a first p-type electrode layer disposed on a light receiving side of the color unit, and including a light-absorptive organic material which selectively absorbs a wavelength other than a desired wavelength in a visible light band of the electromagnetic spectrum; a second p-type electrode layer disposed under the first p-type electrode layer and including a light-absorptive organic material which absorbs a desired wavelength; an n-type electrode layer disposed under the second p-type electrode layer and including an organic material; and an exciton blocking layer configured to block excitons generated in the first p-type electrode layer from transferring to the second p-type electrode layer, wherein a band gap energy of the exciton blocking layer is at least 0.1 eV greater than a band gap energy of the first p-type electrode layer; and wherein photoelectric conversion is performed through a p-n junction between the second p-type electrode layer and the n-type electrode layer and light of the desired wavelength is converted into electrical current.