NOVELTY - Manufacture of photovoltaic cell comprises arranging in order substrate (1), anode (3), active layer (4) and cathode layer (5); and setting benzene derivative (I) electron transport layer (6) with 1-300 degree of polymerization in between active layer and cathode layer. The benzene derivative (I) is prepared by carrying out decarboxylation nitration of benzoic acid derivative, reducing, carrying diazotization reaction with potassium ethyl xanthate; and dissolving in alkaline catalyst with thiophenol (vii) and aromatic iodo (vi) compound or aromatic chloro compound (viii).    USE - Method for manufacturing photovoltaic cell (claimed).    ADVANTAGE - The photovoltaic cell has high open-circuit voltage and good performance.    DETAILED DESCRIPTION - Manufacture of photovoltaic cell comprises arranging in order substrate (1), anode (3), active layer (4) and cathode layer (5); and setting benzene derivative of formula (I) electron transport layer (6) with 1-300 degree of polymerization in between active layer and cathode layer. The benzene derivative (I) is prepared by carrying out decarboxylation nitration of benzoic acid derivative of formula (i) to obtain nitrobenzene derivative of formula (ii), reducing to get aniline derivative of formula (iii), carrying diazotization reaction with potassium ethyl xanthate to get trimethoxy benzene derivative of formula (iv); carrying diazotization reaction of aromatic amine of formula (v) and sodium iodide to get aromatic iodo compound of formula (vi); and dissolving trimethoxy benzene derivative (iv), thiophenol of formula (vii) and aromatic iodo compound (vi) or aromatic chloro compound of formula (viii) in alkaline catalyst.    A=groups of formulae (II)-(V);    R1,R2,R3,R4,R5,R6,R7,R8,R10,R11,R12,R13,R14,R15,R16,R17,R18=H, halo, OH, optionally substituted amine, cyano, 1-6C alkyl optionally substituted with F, Cl or Br, 1-6C alkoxy, nitro, amide, acyl, aldehyde, carboxyl, 1-6C alkoxycarbonyl or acyloxy; and    X,Y'=N, O or S.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of photovoltaic cell.    Substrate (1)    Anode (3)    Active layer (4)    Cathode layer (5)    Electron transport layer (6)