A selenium/Group 3a ink, comprising (a) a selenium/Group 3a complex which comprises a combination of, as initial components: a selenium component comprising selenium; an organic chalcogenide component having a formula selected from RZ-Z'R' and R 2 -SH; wherein Z and Z' are each independently selected from sulfur, selenium and tellurium; wherein R is selected from H, C 1-20 alkyl group, a C 6-20 aryl group, a C 1-20 hydroxyalkyl group, an arylether group and an alkylether group; wherein R' and R 2 are selected from a C 1-20 alkyl group, a C 6-20 aryl group, a C 1-20 hydroxyalkyl group, an arylether group and an alkylether group; and, a Group 3a complex, comprising at least one Group 3a material selected from aluminum, indium, gallium and thallium complexed with a multidentate ligand selected from the group consisting of butanedionate, pentanedionate, hexanedionate, heptanedionate, cyclohexanedionate and 1,1,1,5,5,5-hexafluoroacetylacetone; and, (b) a liquid carrier, wherein the liquid carrier is selected from: amine solvents having two nitrogen atoms per molecule, wherein the nitrogen atoms are either (i) separated by at least 3 carbon atoms in the molecular formula of the amine solvent or (ii) the nitrogen atoms are constituents of an unsaturated ring structure in the molecular formula of the amine solvent; and amine solvents having at least three nitrogen atoms per molecule of the amine solvent; wherein the selenium/Group 3a complex is stably dispersed in the liquid carrier; wherein the selenium component, the organic chalcogenide component and the Group 3a complex do not form a precipitate upon mixing to form the selenium/Group 3a ink in the liquid carrier at 22°C under nitrogen. (a) a selenium/Group 3a complex which comprises a combination of, as initial components: a selenium component comprising selenium; an organic chalcogenide component having a formula selected from RZ-Z'R' and R 2 -SH; wherein Z and Z' are each independently selected from sulfur, selenium and tellurium; wherein R is selected from H, C 1-20 alkyl group, a C 6-20 aryl group, a C 1-20 hydroxyalkyl group, an arylether group and an alkylether group; wherein R' and R 2 are selected from a C 1-20 alkyl group, a C 6-20 aryl group, a C 1-20 hydroxyalkyl group, an arylether group and an alkylether group; and, a Group 3a complex, comprising at least one Group 3a material selected from aluminum, indium, gallium and thallium complexed with a multidentate ligand selected from the group consisting of butanedionate, pentanedionate, hexanedionate, heptanedionate, cyclohexanedionate and 1,1,1,5,5,5-hexafluoroacetylacetone; and, (b) a liquid carrier, wherein the liquid carrier is selected from: amine solvents having two nitrogen atoms per molecule, wherein the nitrogen atoms are either (i) separated by at least 3 carbon atoms in the molecular formula of the amine solvent or (ii) the nitrogen atoms are constituents of an unsaturated ring structure in the molecular formula of the amine solvent; and amine solvents having at least three nitrogen atoms per molecule of the amine solvent; a selenium component comprising selenium; an organic chalcogenide component having a formula selected from RZ-Z'R' and R 2 -SH; wherein Z and Z' are each independently selected from sulfur, selenium and tellurium; wherein R is selected from H, C 1-20 alkyl group, a C 6-20 aryl group, a C 1-20 hydroxyalkyl group, an arylether group and an alkylether group; wherein R' and R 2 are selected from a C 1-20 alkyl group, a C 6-20 aryl group, a C 1-20 hydroxyalkyl group, an arylether group and an alkylether group; and, a Group 3a complex, comprising at least one Group 3a material selected from aluminum, indium, gallium and thallium complexed with a multidentate ligand selected from the group consisting of butanedionate, pentanedionate, hexanedionate, heptanedionate, cyclohexanedionate and 1,1,1,5,5,5-hexafluoroacetylacetone; and, (b) a liquid carrier, wherein the liquid carrier is selected from: amine solvents having two nitrogen atoms per molecule, wherein the nitrogen atoms are either (i) separated by at least 3 carbon atoms in the molecular formula of the amine solvent or (ii) the nitrogen atoms are constituents of an unsaturated ring structure in the molecular formula of the amine solvent; and amine solvents having at least three nitrogen atoms per molecule of the amine solvent; amine solvents having two nitrogen atoms per molecule, wherein the nitrogen atoms are either (i) separated by at least 3 carbon atoms in the molecular formula of the amine solvent or (ii) the nitrogen atoms are constituents of an unsaturated ring structure in the molecular formula of the amine solvent; and amine solvents having at least three nitrogen atoms per molecule of the amine solvent;