NOVELTY - An apparatus (10) comprises: a conduit core (11) comprising at least one radiation transmissive surface; a fluid (12) disposed in the conduit core; and a photoactive assembly (13) at least partially surrounding the conduit core, where the photoactive assembly comprises a radiation transmissive first electrode, at least one photosensitive layer (16) electrically connected to the first electrode (14), and a second electrode (17) electrically connected to the photosensitive layer.    USE - As photovoltaic apparatus (claimed) for converting electromagnetic energy into electrical energy.    ADVANTAGE - The apparatus have the ability to produce electrical energy and thermal energy; and has a solar-thermal efficiency of at least 15% and/or upto 40%.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a photovoltaic apparatus comprising: at least one photovoltaic cell, where the photovoltaic cell comprises a conduit core comprising at least one radiation transmissive surface, a fluid disposed in the conduit core, and a photoactive assembly at least partially surrounding the conduit core, where the photoactive assembly comprises a radiation transmissive first electrode, at least one photosensitive layer electrically connected to the first electrode, and a second electrode electrically connected to the photosensitive layer;    (2) generating excitons in the photosensitive layer involving: receiving radiation at a side or circumferential area of the photovoltaic apparatus; altering the path of at least a portion of the received radiation with the fluid; and transmitting at least a portion of the path altered radiation into the photosensitive layer to generate excitons in the photosensitive layer; and    (3) making a photovoltaic apparatus involving: providing a conduit core comprising at least one radiation transmissive surface; disposing a fluid in the conduit core; and at least partially surrounding the conduit with a photoactive assembly, where the photoactive assembly comprises a radiation transmissive first electrode, at least one photosensitive layer electrically connected to the first electrode, and a second electrode electrically connected to the photosensitive layer.    DESCRIPTION OF DRAWING(S) - The figure shows a cut away view of an apparatus.    Apparatus (10)    Conduit core (11)    Fluid (12)    Photoactive assembly (13)    First electrode (14)    Exciton blocking layer (15)    Photosensitive layer (16)    Second electrode (17)    Electromagnetic radiation (18)