NOVELTY - A photoactive apparatus comprises optical fiber (102) comprising first region and second region; and frequency conversion region (106) disposed between first region and second region of optical fiber. The first region or second region of optical fiber comprises radiation transmissive electrode surrounding optical fiber, photosensitive organic layer(s) surrounding radiation transmissive electrode and electrically connected to radiation transmissive electrode, and an electrode surrounding photosensitive organic layer and electrically connected to photosensitive organic layer.    USE - A photoactive apparatus, preferably photovoltaic cell, for converting photonic energy into electrical energy (claimed).    ADVANTAGE - The apparatus has improved efficiency in converting electromagnetic energy into electrical energy.    DETAILED DESCRIPTION - A photoactive apparatus comprises an optical fiber (102) comprising a first region and a second region; and a frequency conversion region (106) disposed between the first region and the second region of the optical fiber. The first region of the optical fiber comprises a radiation transmissive electrode surrounding the optical fiber, photosensitive organic layer(s) surrounding the radiation transmissive electrode and electrically connected to the radiation transmissive electrode, and an electrode surrounding the photosensitive organic layer and electrically connected to the photosensitive organic layer. The second region of the optical fiber comprises a radiation transmissive electrode surrounding the fiber, photosensitive organic layer(s) surrounding the radiation transmissive electrode and electrically connected to the radiation transmissive electrode, and an electrode surrounding the photosensitive organic layer and electrically connected to the photosensitive organic layer. INDEPENDENT CLAIMS are included for:    (1) a method of making a photovoltaic cell; and    (2) a method of converting photonic energy into electrical energy.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic cross-sectional view of optoelectronic device.    Optical fiber (102)    Frequency conversion region (106)    Waveguiding substrate (112)    Transmission of light (116)    Light source (118)