NOVELTY - A light functional molecular device is obtained by laminating a porphyrin polymer (VIII) or (VIII') immobilized by a covalent bond, on a substrate.    USE - For organic solar cell, tertiary non-linear organic material and optoelectric transducer.    ADVANTAGE - The light functional molecular device has favorable efficiency with small energy losses. The manufacturing method of the molecular device is economical and eco-friendly.    DETAILED DESCRIPTION - A light functional molecular device is obtained by laminating a porphyrin polymer of formula S-D'-P1-P2-P3 (VIII) or (VIII') immobilized by a covalent bond, on a substrate.P1=a group of formula (i);P2=a group of formula (ii);P3=a group of formula (iii);P4=alkyl containing (CH2)m;    a=H, alkyl or aryl;    X=-O-, -S-, greater than NR101, CH2 or single bond;    R101=H or alkyl;    Y'=2H,=O or=S;    m=0-4;    n=0-6;    Z1=5- or 6-membered nitrogen-containing coordinating hetero aromatic ring;    Z2=electron accepting or electron donating group, or group which can change into terminal group of porphyrin polymer;    D'=divalent group containing arylene and/or alkylene;    E=trivalent group containing arylene and/or alkylene;    M=ion of metal chosen from a metal and transition metal;    Q=single bond or divalent connecting group;and    p=integer greater than zero.    An INDEPENDENT CLAIM is included for manufacture of light functional molecular device. A linker molecule of formula (I) is immobilized on a substrate, and a metal (M) is introduced to the porphyrin residue derived from the linker molecule, to obtain a monomolecular film of formula (II) or (II'). The porphyrin residue of the obtained monomolecular film and a porphyrin residue of meso-meso connection hetero aromatic substituted bis porphyrin of formula (III) are connected by two coordinate bond, to obtain a laminate (L1). The olefin portion of the porphyrin residue derived from the linker molecule of the obtained laminate, and the olefin portion of a porphyrin residue coordinated to the porphyrin residue derived from the linker molecule, are subjected to ring-closure metathesis reaction in presence of a Grubbs catalyst, and porphyrin is immobilized by a covalent bond, to obtain a fixed laminate. The porphyrin residue positioned at the terminal of fixed laminate, and a porphyrin residue of porphyrin (III), are connected by a coordinate bond, to obtain a laminate (L2). The obtained laminate (L2) is subjected to ring-closure metathesis reaction in presence of a Grubbs catalyst, and a q-th laminate (L3) is obtained. The porphyrin residue positioned at the terminal of laminate (L3), and the porphyrin residue of the porphyrin derivative of formula (VI) are connected by two coordinate bonds, to obtain a light functional molecular precursor. The olefin portion of the porphyrin residue of the porphyrin derivative, and the olefin portion of a porphyrin residue coordinated to the porphyrin residue of porphyrin derivative, are subjected to ring-closure metathesis reaction in presence of a Grubbs catalyst, and porphyrin is immobilized by a covalent bond, to obtain a porphyrin polymer. The obtained porphyrin polymer is laminated on a substrate, to obtain the light functional molecular device.    R1=D-SR3, E(SR3)2 or a group of formula (4);    a,b',d=same as a;    X,Y,m,n,Z1,Z2,D,E,M and Q=same as defined above, and    R3=H or acetyl group..    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of an apparatus equipped with optoelectric chemical cell, which combined optical cell with trilateral-type electrochemical cell. (Drawing includes non-English language text).