TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - The metal complexes are tri-(8-hydroxyquinolinato)aluminum, 8-hydroxyquinoline zinc salts, N,N-biphenyl-N,N-bis-3-methylphenyl-1,1-biphenyl-4,4-diamine or 4,4'-bis(9-carbazolyl)-2,2'-biphenyl. The buffer agent has a molecular weight smaller than that of the layer of organic molecule (A1) (preferably less than or equal to 2000). The viscosity of the buffer agent solution (Vbf) is higher than that of molecule (A1) solution (VA) i.e. the difference (Vbf-VA) between the viscosity of the buffer agent solution (Vbf) and that of the molecule (A1) solution (VA) is 1 - 2000 eta/mPas. The boiling point of the buffer agent solution is less than or equal to 350degreesC. The buffer agent is alcoholic or alkane solution, (preferably methanol, ethanol or glycerine) which does not dissolve the layer of organic molecule (A1).    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The transparent substrate is glass, or soft film selected from polycarbonates, polyether-sulfones, polymethacrylates or poly-triacetyl celluloses. The organic molecules (A1) and (B1) are aromatic conjugated organic molecules or metallocenes (preferably poly(p-phenylenevinylene) based organic molecules, poly(p-phenyleneethylene)based organic molecules, polyfluorene based organic molecules, polythiophene based organic molecules, polypyrrole based organic molecules, and/or their copolymer). The organic molecules are anthracene, pentacene, phenanthrene, rubrene, 2,3-benzanthracene, perylene, 9,10-phenanthrenequinone, triphenylene, 1,1,4,4-tetraphenyl-1,3-butadiene, N,N'-di((1-naphthyl)-N,N'-diphenyl)-1,1'-biphenyl-4,4'-diamine, titanyl phthalocyanine, 4,4',4''-tris(N-(naphthylene-2-yl)-N-phenylamino)triphenylamine (2-TNATA), N,N'-bis(4-methylphenyl)-N,N'-bis(phenyl)-1,4-phenylenediamine, triphenylamine, tri-p-tolylamine, tri(4-(diethylamino)phenyl)amine, N,N'-diphenylbrenzidine, 2-(4-biphenylyl)-5-phenyl-1,3,4-oxadiazole, 2,5-diphenyl-1,3,4-oxadiazole, 5-(4-pyridyl)-1,3,4-oxadiazole-2-thiol, 2-(4-bromophenyl)-5-phenyl-1,3,4-oxadiazole, 2,5-bis(4-aminophenyl)-1,3,4-oxadiazole, 5-phenyl-1,3,4-oxadiole-2-thiol, 2,1,3-benzoxadiole-5-carboxylic acid, 5-(4-methoxyphenyl)-1,3,4-oxadiole-2-thiol, 7,7,8,8-tetracyanoquinodimethane, tetracyanoethylene, perfluorotetracyanoquinolyldimethane, or 2-(4-((bis(2-hydroxyethyl)aminophenyl)-cyanomethylene)-2,5-cyclohexadien-1-yldiene)malo nitrile.