NOVELTY - Fabricating a liquid containing intermixed elements of Groups IB and IIIA and optionally VIA, involves forming nanoparticles containing elements from Group IB; and forming nanoparticles containing elements from Group IIIA; and optionally forming non-oxide nanoparticles containing elements from Group VIA; combining the nanoparticles with a liquid to form an ink, where the nanoparticles for the ink may be prepared from a mixture of metal nanoparticles and a vapor or powder containing either selenium (Se) or sulfur (S).    USE - For fabricating a liquid containing intermixed elements of Groups IB and IIIA and optionally VIA, useful in photovoltaic device precursor material (claimed) and in photovoltaic cells, and solar cells; for low cost web coating of ink-based photovoltaic cells.    ADVANTAGE - The use of ink avoids the need to expose the material to H2Se gas during the construction of photovoltaic cell and allows more uniform melting during film annealing, more uniform intermixing of nanoparticles and allows higher quality absorber films to be formed. The use of non-oxide or elemental metal particles avoids having to reduce the particles, film or IB-IIIA-VIA layer with H2.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a photovoltaic device precursor material comprising: a liquid ink containing non-oxide metal nanoparticles containing elements from Group IB, non-oxide metal nanoparticles from Group IIIA; and adding at least one liquid metal containing at least one element of Group IIIA, where forming a mixture of non-oxide quantum nanoparticles includes reacting a single-source precursor to form particles of IB-IIIA-VIA material (206); a dispersant; and a solvent.    DESCRIPTION OF DRAWING(S) - The figure shows schematic diagram of photovoltaic cell.    Substrate or base layer (202)    Base electrode (204)    Group IB-IIIA-VIA layer (206)    Window layer (208)    Transparent conductive oxide layer (209)    Transparent electrode (210)    Layer of metal fingers. (211)