TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The absorption spectrum of the organic hole conductor material at a wavelength of lambda (HTL) + 30 nm has declined to a decadic absorbance of less than 0.2, preferably less than 0.05, and for wavelengths of lambda (HTL) + 30 nm to 800 nm has a decadic absorbance of less than 0.2, preferably less than 0.05. The longpass fitter has an edge steepness S(Lp) of the rising transmission edge, where S(Lp) is less than or equal to 1.2 electron volt (eV), preferably less than or equal to 0.8 eV. The photovoltaic element has a transparent substrate, the longpass filter having been applied to the transparent substrate. The first electrode or the second electrode has been applied to a first side of the substrate, the longpass filter having been applied to a second side of the substrate opposing the first side. The longpass filter in at least one transmission region takes up a transmission of at least 75%, preferably at least 85%. The longpass filter in at least one absorption region takes up a decadic absorbance of at least 3, preferably at least 4. The organic hole conductor material comprises an arylamine compound and/or a spiro compound having a structure of formula (I), preferably N,N,N',N',N'',N'',N''',N'''-octakis-(4-methoxy-phenyl)-9H,18H-tetrabenzo(a,c,f,h)cyclodecene-2,7,11,16-tetraamine. The organic hole conductor material has a structure of formula (III). The longpass filter comprises: at least one inorganic filter material, preferably a metal oxide consisting of silicon dioxide, titanium dioxide, zirconium dioxide and tantalum pentoxide; at least one organic fitter dye, preferably at least one rylene dye; at least one transparent organic matrix material and at least one absorber material introduced, preferably mixed, into the matrix material; and at least two absorber materials introduced, preferably mixed, into the matrix material, one absorber material being an absorber material comprising a triazine group, where the absorber material has a structure of formula (A) and the other absorber material has a structure of formula (B). The longpass filter is producible by means of a sol-gel process or producible by applying a solution comprising at least one filter material and at least one solvent to a substrate, and then the solvent is removed or produced by introducing at least one absorber material into at least one transparent organic matrix material. The dye has an absorption with a decadic absorbance of at least 0.1, preferably at least 1 at at least one wavelength in a spectral range of above lambda (HTL). The matrix material comprises at least one varnish. The varnish is a polyacrylate-polyester varnish. The varnish is applied by applying a coating composition, where the coating composition comprises at least one polyester resin, at least one polyacrylate resin, and at least one crosslinking agent, where the crosslinking agent comprises polyisocyanates (preferred), amide- and amine-formaldehyde resins, phenol resins, aldehyde resins and ketone resins. The absorber material comprises at least one organic absorber material comprising compounds comprising a benzotriazole group or a triazine group.Aryl1-Aryl8 = aryl radicals or heteroaryl radicals, preferably substituted phenyl radicals (both substituted by -O-alkyl, -OH, -F, -Cl, -Br or -I), where alkyl is methyl (preferred), ethyl, propyl or isopropyl;A1-A3 = optionally substituted aryl or heteroaryl;R1-R3 = -R, -OR, -NR2, -A4-OR or -A4-NR2;R = alkyl, aryl or heteroaryl;A4 = aryl or heteroaryl;n = 0-3;alkyl1 = 12-13C linear alkyl;Rbb, Rbd = H, -alkyl, -OH, -alkylaryl, -alkylheteryl, -cycloalkyl, cycloheteroalkyl, alkenyl, aryl or -SO3H; andRxz = H, alkyl, aryl, heteroaryl, alkylaryl, alkylheteroryl, alkenyl or alkynyl.Provided that the sum of the individual values n is at least 2 and at least two of the R1-R3 radicals are -OR and/or -NR2.