NOVELTY - Composition comprises a grafted copolymer with a linear chain comprising at least one non-aromatic vinyl polymer or unsaturated polyolefin, and at least two grafts attached to the linear chain by a chemical bond, where each graft comprises a conjugated polymer.    USE - The composition is useful: in organic photovoltaic cells of a photovoltaic module (claimed) and semiconductor inks for printing electronic devices, and transparent electrodes for photovoltaic cells or organic light emitting diodes; and for dispersing carbon nanotubes.    ADVANTAGE - The composition is recyclable and has improved stability.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a photovoltaic module having at least a layer forming an encapsulant comprising a photovoltaic battery with organic photovoltaic cells to generate electricity, and a layer forming a backsheet or a rear panel, where the photovoltaic battery comprises the composition;    (2) a process (I) for synthesizing a conjugated polymer, preferably poly(3-hexylthiophene) (P3HT) ending with omega -thiol comprising treating an amount Q1 of P3HT ending with omega -allyl in a container, which is placed under inert atmosphere by vacuum/dinitrogen cycles, adding an amount Q2 of apolar aromatic solvent, preferably toluene, adding an amount Q3 of alkane dithiol, preferably 1,3-propane dithiol, adding an amount Q4 of a radical generator of diazo or peroxide type, preferably azobisisobutyronitrile (AIBN), maintaining the mixture at 0-200 degrees C depending on radical generating system and 40-130 degrees C for minimum of one hour in the utilization of AIBN, adding an amount Q5 of radical generator, which is similar or different from that of Q4, and maintaining, when Q5 is non-zero, the mixture at 0-200 degrees C depending on the radical generating system and at 40-130 degrees C for a minimum time of one hour in the utilization of AIBN, where the ratio of Q1 and Q2 is 15-50, Q3 is lower than Q2, and Q5 is equal to Q4, preferably Q5 is equal to 0-10 Q4; and    (3) synthesizing P3HT ending with omega -acrylate, comprising treating an amount Q1 of P3HT ending with omega -hydroxyl in a container under inert atmosphere by vacuum-dinitrogen cycles, adding an amount Q2 of polar solvent, preferably tetrahydrofuran, adding an amount Q3 of a base, preferably tertiary amine, preferably triethylamine, and adding acrylate chloride, preferably acryloyl chloride, where the ratio of Q1 and Q2 is 2-10 and Q3 is lower than Q2.