NOVELTY - Conjugated polymers (P1) based on 2,3-diphenylquinoxaline, dibenzo(a,c)phenazine, 2,3-diphenylpyrido(3,4-b)pyrazine, dibenzo(f,h)pyrido(3,4-b)quinoxaline, 2,3-diphenylpyrazino(2,3-d)pyridazine and dibenzo(f,h)pyridazino(4,5-b)quinoxaline along with their derivatives and thiophene, thieno(3,2-b)thiophene and thieno(2,3-b)thiophene, along with their derivatives, are new.    USE - As conjugated polymers useful for making thin layer (as active layer components) for optoelectronic device (claimed); in the fields of polymer solar cell and field effect transistors.    ADVANTAGE - The conjugated polymers can be used in the fields of polymer solar cell and field effect transistors due to good solubility, high carrier mobility and relatively strong modifiability of chemical property and chemical structure. The preparation method is simple and can be handled and controlled easily.    DETAILED DESCRIPTION - Conjugated polymers (P1), based on 2,3-diphenylquinoxaline, dibenzo(a,c)phenazine, 2,3-diphenylpyrido(3,4-b)pyrazine, dibenzo(f,h)pyrido(3,4-b)quinoxaline, 2,3-diphenylpyrazino(2,3-d)pyridazine and dibenzo(f,h)pyridazino(4,5-b)quinoxaline along with their derivatives and thiophene, thieno(3,2-b)thiophene and thieno(2,3-b)thiophene, along with their derivatives selected from 54 compounds as given in the specification e.g. compounds of formulae (I), (Ia)-(Ih), are new.    X=H or F;    Y1=linear or branched alkyl or alkoxy (which is in ortho, meta or para positions of phenyl ring);    Z1=O, S or selenium;    m and n=1-1000;    R1=a group of formula -CpH2p+1 (linear or branched);    p= greater than or equal to 0.    INDEPENDENT CLAIMS are included for the following:    (1) preparation of conjugated polymers (P1);    (2) preparing a thin layer (A1) of the conjugated polymers (P1) involving: a) depositing a layer of a polymer structure (P1) by calendaring, screen printing, drop casting, doctor blade, spin coating or spraying, b) drying the layer deposited in step (a), c) depositing a layer of a blend comprising the polymer structure (P1) with a fullerene (60C, 70C, 84C) derivative by calendaring, screen printing, drop casting, doctor blade, spin coating or spraying, and d) drying the layer deposited in step (c); and    (3) an optoelectronic device comprising at least one of the thin layer (A1) as active layer components.