NOVELTY - Semiconductive ink comprises micron-sized particulates of chalcopyrite compound (I), where the size of micron-sized particulate of (I) is 0.4-4 mu m; nano-sized particulates of (I), where the size of nano-sized particulate of (I) is 2-350 nm; solvents consisting of heteroatom, which is nitrogen, oxygen, sulfur or phosphorus, for dissolving and stabilizing nano-sized particulates; and liquid vehicles.    USE - The semiconductive ink is useful for printing semiconductor photovoltaic cells, which are tandem multi junction, preferably two junction monolithic solar cell and mechanically stacked tandem solar cells (all claimed).    ADVANTAGE - The ink provides photovoltaic cell with improved efficiency at low cost.    DETAILED DESCRIPTION - Semiconductive ink comprises: micron-sized particulates of chalcopyrite compound of formula (CuInxGa1-xSeyS2-y) (I), where the size of micron-sized particulate of (I) is 0.4-4 mu m; nano-sized particulates of (I), where the size of nano-sized particulate of (I) is 2-350 nm; solvents consisting of heteroatom, which is nitrogen, oxygen, sulfur or phosphorus, for dissolving and stabilizing nano-sized particulates; and liquid vehicles.    x = 0 or 1; and    y = 0-2.    INDEPENDENT CLAIMS are included for:    (1) manufacturing a solar cell comprising obtaining a first electrode surface, printing a nanoparticle chalcopyrite ink onto the first electrode surface, where the chalcopyrite nanoink comprises the semiconductive ink, forming a p-n heterojunction with a n-type semiconductor and coupling a second electrode to the p-n heterojunction;    (2) manufacturing a tandem two junction monolithic solar cell comprising either forming an upper cell comprising a p-type semiconductive thin film of (I) having a bandgap of about 1.6-2.4 eV by the printing method, forming a lower cell comprising a p-type semiconductive thin film of (I) having a bandgap of about 1-1.2 eV by a wet-coating method, forming a transparent conductive oxide layer to electrically connect the upper cell and lower cell, or forming the lower cell, forming a upper cell using a p-I-n structure of silicon:hydrogen thin film solar with the band gap of 1.6-1.8 eV, forming a transparent conductive oxide layer to electrically connect the upper cell and lower cell; and    (3) manufacturing a mechanically stacked four terminal solar cell comprising forming the upper cell, forming the lower cell, coupling the upper cell and lower cell by using a polymer binder to form a mechanically stacked tandem solar cell with four terminals.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view of monolithic linked tandem solar cell.