NOVELTY - Spheres corresponding to an array of apertures in a first metallic electrode are disposed between the first metallic electrode and a second electrode of a photovoltaic device. The spheres have first and second portions of first and second conductivity p or n doped material, respectively. Each portion electrically contacts the first and second electrodes, respectively.    USE - Generation of electrical current to drive an electrical appliance from light, especially sunlight.    ADVANTAGE - Increased energy conversion efficiency is obtained.    DETAILED DESCRIPTION - A surface-plasmon enhanced photovoltaic device comprises:    (a) a first metallic electrode (106) with an array of apertures, and having a light-incident illuminated surface and a non-illuminated surface, one surface of which has an enhancement characteristic resulting in a resonant interaction of the incident light with surface plasmons (electronic excitations confined to the metal surface);    (b) a second electrode (114) spaced from the first electrode (106); and    (c) a number of spheres (102) corresponding to the array of apertures and located between the electrodes (106, 114), each sphere (102) having a first portion (110) of either p or n doped material and a second portion (112) having an opposite p or n doped material such that a p-n junction is formed between the first and second portions, and where individual spheres (102) are disposed in the apertures such that either the first or second portion is in electrical contact with the first metallic electrode (106) and the other portion is in electrical contact with the second electrode (114).    INDEPENDENT CLAIMS are given for:    (a) an electrical device having a power supply comprising the above surface-plasmon enhanced photovoltaic device; and    (b) a method for fabricating the photovoltaic device.    DESCRIPTION OF DRAWING(S) - The drawing shows a simplified sectional view of the device according to the invention.    Spheres (102)    First metallic electrode (106)    Adhesive (108)    First portion of sphere (110)    Second portion of sphere (112)    Second electrode (114)    Insulating underlayer (116)    Transparent overlayer (124)