TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: No preparation method is given. Preferred Components: (I) is present at 0.001-30 wt.% in the precursor solution. The organic solvent is at least one of an aliphatic hydrocarbon solvent including hexane or heptane, an aromatic hydrocarbon solvent including toluene, pyridine, quinoline, anisol, mesitylene, xylene or chlorobenzene, a ketone-based solvent including methyl isobutyl ketone, 1-methyl-2-pyrrolidinone, cyclohexanone or acetone, an ether-based solvent including tetrahydrofuran or isopropyl ether, an acetate-based solvent including ethyl acetate, butyl acetate or propylene glycol methyl ether acetate, an alcohol based solvent including isopropyl alcohol or butyl alcohol, an amide-based solvent including dimethylacetamide or dimethylformamide, a halogen-based solvent including dichloromethane or trichloromethane and/or a silicon-based solvent. Preferred method: The precursor solution is prepared by mixing two or more (I). In the method: applying the precursor solution is performed using spin coating, dip coating, roll coating, screen coating, spray coating, spin casting, flow coating, screen printing, ink jetting or drop casting; and heating the coating film is performed at 100-250 degrees C. SPECIFIC COMPOUNDS - 1 Compound (I) is disclosed i.e. 3,9-diethynyl-2,8-di-oct-1-ynyl-5,11-bis-triethylsilanylethynyl-1,7-dithia-dicyclopenta(b,i)anthracene of formula (Ia).    EXAMPLE - Dialdehyde (1 equivalent) and 1,6-cyclohexadione (0.5 equivalent) were dissolved in ethanol, and 5% aqueous sodium hydroxide was slowly added to it. After being allowed to stand overnight, the precipitate was filtered and dried. Trimethylsilyl acetylene (3 equivalent), bis(triphenylphosphine)palladium(II)chloride (0.1 equivalent) and copper iodide (0.05 equivalent) were refluxed in tetrahydrofuran (THF) and diisopropylamine for 10 hours to obtain a tetraethynyl compound. The tetraethynyl compound in THF was slowly added with a Grignard reagent made using trimethylsilyl acetylene (3 equivalent), and then refluxed for 3 hours. Aqueous tin(II)chloride was added to the reactor, and then stirred at for 1 hour. The resultant organic layer was washed with water and chloroform, dried, and then purified to yield 2,8-di-oct-1-ynyl-5,11-bis-triethylsilanylethynyl-3,9-bis-trimethylsilanylethynyl-1,7-dithia-dicyclopenta(b,i)anthracene (product-1). The product-1 was dissolved in chloroform, added with methanol and THF, further added with an excess of about IN aqueous sodium hydroxide, and then allowed to react. The resultant reaction product was washed with water, and the organic layer was dried and then purified yield 3,9-diethynyl-2,8-di-oct-1-ynyl-5,11-bis-triethylsilanylethynyl-1,7-dithia-dicyclopenta(b,i)anthracene.