NOVELTY - Polymer and nanoparticle combination comprises: a conductive copolymer or a polymer having at least one first conductive monomer comprising substituted heterobicyclyl moiety containing unit (III), and at least one second conductive monomer, where the first and second conductive monomers are copolymerized to form the copolymer; and a conductive nanoparticle covalently bound to a first end of a linker and a second end of the linker being covalently bound to the conductive copolymer, so that the nanoparticle is indirectly linked to the conductive polymer through the linker.    USE - The polymer and nanoparticle combination is useful in an electronic device (claimed) including LEDs, LED displays, LCDs, electronic paper, touch-screens, diode lasers, photodetectors, photoconductive cells, photoresistors, photoswitches, phototransistors, phototubes, infrared detectors, photovoltaic devices, solar cells, transistors, diodes, memory storage devices, antistatic films biosensors, electrochromic devices, solid electrolyte capacitors, energy storage devices, electromagnetic wave shielding films, window deicers, heat reflectors, architectural materials electro-optic modulators, microresonators, interferometers, optical switches, directional couplers or multiplexers.    ADVANTAGE - The polymer and nanoparticle combination exhibited improved electrical conductivity; utilizes the electrically conductive polymers exhibiting improved solubility; and improves the performance and lifetime of the organic electronic device.    DETAILED DESCRIPTION - Polymer and nanoparticle combination comprises: a conductive copolymer or a polymer having at least one first conductive monomer comprising substituted heterobicyclyl moiety containing unit of formula (III), or its analog or derivative, and at least one second conductive monomer comprising substituted arylene moiety containing units of formula (I), where the first and second conductive monomers are copolymerized to form the copolymer; and a conductive nanoparticle covalently bound to a first end of a linker and a second end of the linker being covalently bound to the conductive copolymer, so that the nanoparticle is indirectly linked to the conductive polymer through the linker, where the conductive nanoparticle is gold, silver, copper, platinum or palladium. The linker includes at least one of alkylthio, alkenylthio or alkynylthio. The conductive nanoparticle is linked to the conductive monomers through R2 or R2a substituent, where the conductive monomers are covalently bound to the first end of the linker and the second end of the linker being covalently bound to the conductive nanoparticle.    X1 = NH, O, S or PH; either    R2, R2a = alkyl, alkenyl, alkynyl, alkanoyl, alkanoylamino, alkenoyl, alkynoyl, alkoxy, alkoxycarbonyl, alkoxycarbonylamino, alkylamino, alkylaminocarbonyl, dialkylaminocarbonyl, alkyl sulfonyl, alkylsulfinyl, sulfonylaminoalkyl, alkylsulfonylaminocarbonyl, aminoalkyl, cyanoalkyl, halo, haloalkyl, haloalkenyl, haloalkynyl, haloalkanoyl, haloalkenoyl, haloalkynoyl, haloalkoxy, haloalkoxycarbonyl, hydroxyalkyl, oxoalkyl, cycloalkyl, cycloalkenyl, cycloalkanoyl, cycloalkenoyl, cycloalkoxy, cycloalkoxycarbonyl, aryl, arylene, heterocyclyl, heteroaryl, heteroarylene, arylalkyl, heteroarylalkyl, arylalkanoyl, heteroarylalkanoyl, arylalkenoyl, heteroarylalkenoyl, arylalkynoyl, heteroarylalkynoyl, arylalkoxy, heteroarylalkoxy, aryloxy, heteroaryloxy, aryloxycarbonyl, heteroaryloxycarbonyl, arylalkoxycarbonyl, heteroarylalkoxycarbonyl, alkylthio, alkylthioalkyl, arylthio, arylsulfonyl, arylsulfonyl (all optionally substituted) or H or OH; or    R2+R2a = alkylene or alkenylene chain completing 3-7 membered aromatic or alicyclic ring having greater than or equal to 0 divalent N, S or O; and    A1 = phenylene, phenylene vinylene, pyrrolylene, pyrrolylene vinylene, thienylene, thienylene vinylene, fluorenylene, fluorenylene vinylene, furanylene, furanylene vinylene, phenothiazinylene, phenothiazinylene vinylene, phenazinylene, phenazinylene vinylene, phenoxazinylene or phenoxazinylene vinylene (all optionally substituted with at least one R2).    INDEPENDENT CLAIMS are also included for a composition comprising: the polymer and nanoparticle combination, and a polymeric acid doped into the polymer; or the polymer and nanoparticle combination, where the conductive nanoparticle is surrounded by hydrophilic moieties bonded to it to increase solubility of the polymer and nanoparticle combination in water.