TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The first electrode comprises indium tin oxide. The second electrode comprises aluminum. The transparent substrate is glass.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: In the method: the active layer of organic photovoltaic material includes a blend of poly(3-hexylthiophene) (PHT), (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) or poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TFE) (402), where the PVDF-TFE is present at 0-25 wt.%; and the PHT, PCBM and PVDF-TFE are blended by dissolution in a solvent, where the solvent is configured to disperse the PVDF-TFE primarily in the PHT or PCBM, or to disperse the PVDF-TFE equally well in both the PHT and the PCBM. The method further comprises: depositing a thin film of PVDF-TFE between the active layer and the first electrode; and depositing a thin film of PVDF-TFE between the active layer and the second electrode. The step of depositing the thin film of PVDF-TFE between the active layer and the first electrode comprises: blending PVDF-TFE with PHT and depositing a layer of the blended PVDF-TFE and PHT between the first electrode and the active layer; blending PVDF-TFE with poly(3,4-ethylene-dioxythiophene) (PEDOT) that is doped with poly(styrenesulfonate) (PSS), and depositing a layer of the blended PVDF-TFE and PEDOT:PSS between the first electrode and the active layer; or depositing a layer of PVDF-TFE onto a layer of PEDOT:PSS which has been applied to the first electrode before deposition of the active layer. The step of depositing the thin film of PVDF-TFE between the active layer and the second electrode comprises: blending PVDF-TFE with PCBM, and depositing the blended layer of PVDF-TFE and PCBM between the active layer and the second electrode; blending PVDF-TFE with titanium dioxide or zinc oxide nanoparticles, and depositing the blended layer of PVDF-TFE and either titanium dioxide or zinc oxide between the active layer and the first electrode; or depositing a layer of PVDF-TFE onto the active layer before deposition of the second electrode. EXAMPLE - No suitable example given.