NOVELTY - Photovoltaic element (110) comprises at least one first electrode (116) and at least one n-semiconductive metal oxide (120) and further comprises at least one dye (112) for absorption of at least a portion of the electromagnetic radiation (130), at least one organic hole conductor material and at least one second electrode.    USE - The photovoltaic element is useful for conversion of electromagnetic radiation to electrical energy. The varnish is useful for protection of the photovoltaic element for conversion of electromagnetic radiation from damage by UV radiation (claimed).    ADVANTAGE - The photovoltaic element exhibits high long-term stability.    DETAILED DESCRIPTION - Photovoltaic element (110) comprises at least one first electrode (116), at least one n-semiconductive metal oxide (120) and further comprises at least one dye (112) for absorption of at least a portion of the electromagnetic radiation (130), at least one organic hole conductor material and at least one second electrode, where the organic hole conductor material in the photovoltaic element has an absorption spectrum for the electromagnetic radiation having an absorption maximum in an UV or blue spectral region and then, toward higher wavelengths, an absorption edge declining with the wavelength of the electromagnetic radiation and having a characteristic wavelength lambda (HTL), a decadic absorbance of the hole conductor material at a wavelength lambda (HTL) within the declining absorption edge being 0.3, the photovoltaic element further comprises at least one longpass filter, and the long pass filter has a transmission edge rising with the wavelength of the electromagnetic radiation and having a characteristic wavelength lambda (LP), a transmission of the longpass filter at lambda (Lp) being 50% of a maximum transmission of the longpass filter, where lambda (LP) is greater than lambda (HTL) and lesser than or equal to lambda (HTL) + 30 nm. INDEPENDENT CLAIMS are included for:    (1) producing the photovoltaic element comprising providing at least one first electrode, at least one n-semiconductive metal oxide, at least one dye for absorption of at least a portion of the electromagnetic radiation, at least one organic hole conductor material and at least one second electrode by applying to a substrate, and providing at least one longpass filter by applying to the substrate;    (2) selecting a longpass filter in the photovoltaic element comprising determining an absorption spectrum of the organic hole conductor material in the photovoltaic element, evaluating the absorption spectrum and determining a characteristic wavelength lambda (HTL), where the characteristic wavelength is within a declining absorption edge in which an absorption of the organic hole conductor material in the photovoltaic element declines proceeding from an absorption maximum in an UV or blue spectral range, a decadic absorbance of the hole conductor material at the characteristic wavelength lambda (HTL) being 0.3, and selecting the longpass filter such that the longpass filter; and    (3) a use of a varnish for protection of the photovoltaic element for conversion of electromagnetic radiation from damage by UV radiation, comprising at least one organic matrix material and at least one absorber material introduced into the matrix material, preferably at least two absorber materials introduced into the matrix material.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a layer structure of a photovoltaic element.    Photovoltaic element (110)    First electrode (116)    n-Semiconductive metal oxide (120)    Dye (112)    Electromagnetic radiation. (130)