NOVELTY - A photovoltaic cell or device (100) comprises at least one light transmissive layer with a three dimensional surface pattern. The device further comprises a first electrode layer (102) positioned below the light transmissive layer, where the first electrode layer is transparent; a photovoltaically-active layer (103) positioned below the first transparent conductor; and a second electrode (104) layer positioned below the photovoltaically-active layer.    USE - As photovoltaic cell or device, including thin film photovoltaic device for manufacturing light transmissive film; and for converting electromagnetic energy into electrical energy (all claimed).    ADVANTAGE - The photovoltaic devices include at least one layer that comprises three-dimensional surface features through which incident light must pass before reaching a photovoltaically-active layer. These three-dimensional surface features scatter the light such that the path of the light through the photovoltaic device is increased. Increasing the light path through the photovoltaically-active layer increases the photocurrent that flows through the photovoltaically-active layer and therefore increases the overall electrical power produced by the device. Thus, the efficiency of the photovoltaic devices (e.g. the amount of electrical power produced) can be increased and/or the thickness of the photovoltaically- active layer can be decreased resulting in lower material costs.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) manufacturing a photovoltaic cell or device, involving providing at least one light transmissive film with a three dimensional surface pattern, where the light transmissive layer comprises a front surface and a rear surface disposed opposite to the front surface, depositing a transparent conductive oxide layer on the rear surface such that the deposited transparent conductive oxide layer has a first surface that contacts the rear surface and a second surface disposed opposite to the first surface, and depositing a photovoltaically-active layer on the second surface such that the photovoltaic active layer is configured to receive electromagnetic radiation through the substrate layer and the first transparent conductive oxide layer;    (2) manufacturing a light transmissive film, involving providing to at least one of the forming surfaces of a continuous forming machine a feed of material able to assume and retain a form after being molded between that first mentioned forming surface and a second forming surface, and allowing that formation to take place as such surfaces are advanced in the same direction, where the output is of a form a three dimensional surface pattern adapted for assembly into a thin film photovoltaic cell; and    (3) converting electromagnetic energy into electrical energy, involving receiving electromagnetic radiation through a light transmissive substrate-layer having 3D surface features, transmitting the radiation into at least one photovoltaically-active layer through a transparent electrode beneath the light transmissive substrate layer, generating excitons in the photovoltaically-active layer, and separating the excitons into electrons and holes, and removing the electrons into an external circuit.    DESCRIPTION OF DRAWING(S) - The figure shows a cross sectional view of a photovoltaic device comprising a two-sided three-dimensional substrate layer.    Photovoltaic cell or device (100)    Transparent polymer substrate (101)    First electrode layer (102)    Photovoltaically-active layer (103)    Second electrode (104)