TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The alkoxysilane bonded with a fluorescent dye is prepared by reacting: a fluorescent dye having a hydroxy group with a substituted siloxane compound of formula (R1-Si-(OR2)3) or its mixture; a fluorescent dye having at least one of carboxylic group, urethane group or urea group with substituted siloxane compound of formula (R3-Si-(OR2)3) or its mixture; a fluorescent dye having at least one of a primary amino group, a secondary amino group or a tertiary amino group with substituted siloxane compound of formula (R4-Si-(OR2)3) or its mixture; a fluorescent dye having a cyano group with substituted siloxane compound of formula (R5-Si-(OR2)3); and/or a fluorescent dye having isothiocyanate group with a substituted siloxane compound of formula (R6-Si-(OR2)3) or its mixture. The fluorescent dye has at least one rhodamine, coumarin, fluorescein, perylene, 4-dicyanomethylene-2-methyl-6-p-dimethylaminostyryl-4H-pyran or pyrizine, as a matrix. The organo-alkoxysilane is substituted siloxane compound of formula (R7-Si-(OR2)3) or its mixture, preferably 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltripropoxysilane, N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyltriethoxysilane, N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyltri-methoxysilane, N-(3-acryloxy-2-hydroxypropyl)-3-amino-propyltripropoxysilane, 3-acryloxypropylmethylbis(trimethoxy)silane, 3-acryloxypropyltrimethoxysilane, 3-acryloxypropyltriethoxysilane, 3-acryloxypropyltripropoxysilane, 3-(meth)acryloxypropyltrimethoxysilane, 3-(meth)acryloxypropyltriethoxysilane and/or 3-(meth)acryloxypropyltripropoxysilane. The organo-silanediol is of formula (OH-Si(R8)(R9)-OH2) or its mixture, preferably diphenylsilanediol and/or diisobutylsilanediol. The polycondensation reaction is a sol-gel reaction. The fluorescent dye-siloxane hybrid resin includes: a thermocurable or UV-curable functional group; a curing agent for thermal curing or UV curing; a monomer having a thermocurable or UV- curable functional group; a side reaction adjuster and a solvent for improving curability and controlling viscosity; and at least one of a quantum dot, an inorganic phosphor, conjugated polymer, surfactant, antioxidant, active oxygen remover, silica sol, oxide or nitride nanoparticles, flameproofing agent, metal filler or heat-resisting agent.R1 = Q, isocyanate, 1-20C alkoxy or OH;Q = 1-20C alkyl, 3-8C cycloalkyl, 4-20C alkyl (optionally substituted with 3-8C cycloalkyl), 2-20C alkenyl, 2-20C alkynyl or 6-20C allyl;R3 = Q or isocyanate;R4 = Q, isocyanate, isothiocyanate, epoxy, halo or carbonyl;R5 = Q, NH2, alkene or halo;R6 = Q or NH2;R7 = Q, acryl, methacryl, vinyl or epoxy;R8, R9 = Q, acryl, methacryl, allyl, halo, NH2, mercapto, ether, ester, 1-20C alkoxy, sulfone, nitro, OH, cyclobutene, carbonyl, carboxy, alkyd, urethane, vinyl, nitrile or epoxy; andR2 = optionally branched 1-7C alkyl. EXAMPLE - 7-Amino-4-methylcoumarin and 3-isocyanatepropyltriethoxysilane were added into 10 ml glass bottle at a molar ratio of 1:1, and the glass bottle was closed by a cover. The resultant mixture was reacted for 2 hours at room temperature using a magnetic stirrer to obtain an alkoxysilane bonded with coumarin. The resultant alkoxysilane bonded with coumarin was then introduced into 200 ml flask together with 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane and diphenylsilanediol at a molar ratio of 0.001:2:3. Then barium hydroxide (catalyst) (0.1 mol% based on silane) was added to the resultant mixture and stirred for 4 hours at 80 degrees C to obtain a coumarin-siloxane hybrid resin having blue fluorescence. Then an allylsulfonium hexafluoroantimony salt (photocuring catalyst) (4 wt.%) was added to the obtained coumarin-siloxane hybrid resin, based on an organo-oligosiloxane resin. The resultant coumarin-siloxane hybrid resin was then kept into a plastic frame. The resultant coumarin-siloxane hybrid resin was then photocured by exposing it to an UV lamp having a wavelength of 365 nm for 1 minute. Then the plastic frame was removed, and the coumarin-siloxane hybrid resin was additionally cured for 2 hours at 120 degrees C, to obtain the fluorescent dye siloxane hybrid resin.