TECHNOLOGY FOCUS - ELECTRONICS - Preferred Properties: The photovoltaic device has a solid conjugated semiconductor comprising a hole transport material mixed with a dopant.The device also has a blend or bilayer structure of conductive organic and/or polymer materials, where one component is a p-type conductor and the other one is an n-type conductor.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Compounds: The evaporated fluoride is an alkali or alkaline earth metal fluoride. The evaporated acetate is an alkali metal acetate.Preferred Layer: The device has a semiconductor oxide layer sensitized with a dye, preferably a ruthenium complex dye.The evaporated layer containing fluoride and/or acetate is evaporated on top of the semiconductor oxide layer and/or on top of a layer of the hole transport material and/or on top of a transparent conductive oxide electrode.The semiconductor oxide layer is titanium dioxide.The evaporated layer has a thickness of 0.5-30 nm, preferably 0.5-15 nm.The fluorides and/or acetates evaporated on different layers of the device have different counter cations.The evaporated layer which is evaporated on the semiconductor oxide layer comprises lithium fluoride having a thickness of 5 nm, and the evaporated layer which is evaporated on the hole transport material comprises cesium fluoride having a thickness of 15 nm.The semiconductor oxide layer is porous, and comprises nanoparticles, preferably nanoparticles of titanium dioxide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Material: The hole transport material is represented by formulae (I, II or III).R = chosen from hexyl and ethylhexyl within the wt% ratio of hexyl:ethylhexyl being 40-60. EXAMPLE - A transparent conductive oxide layer substrate was ultrasonically cleaned for 15 minutes in an aqueous surfactant at 70degrees C, rinsed thoroughly with ultrapure water, and dried in air. A polycrystalline titanium dioxide was made by spray pyrolysis of titanium acetylacetonate solution, and the film was tempered at 500degrees C. A nanoporous titanium dioxide semiconductor oxide layer was formed, and the nanocrystalline titanium dioxide film was dyed. A lithium fluoride was evaporated to a thickness of 5 nm. A solution of hole transport material was prepared and spin-coated onto the film. Cesium fluoride was then evaporated to a thickness of 15 nm. A counter electrode was then deposited to form a photovoltaic device. The obtained device yielded an efficiency of 1% at 100 mW/cm2.