NOVELTY - Selenium ink comprises as initial components: selenium component comprising selenium; an organic chalcogenide component comprising substituted hydrocarbon compounds (I) or (II); and a liquid carrier, where the selenium ink is a stable dispersion and free of hydrazine and hydrazinium, and comprises selenium ( less than or equal to 1 wt.%).    USE - The selenium ink is useful to deposit selenium on a substrate (claimed), which is useful in the manufacture of a variety of chalcogenide containing semiconductor materials e.g. thin film transistors, solar cells, LEDs, photoresponsive devices (including rectifiers, photographic exposure meters, photovoltaic cells, and electrophotography e.g. laser printers and copiers) and chalcogenide containing phase change memory materials.    ADVANTAGE - The selenium ink: is a stable dispersion and free of hydrazine and hydrazinium; and provides uniform or graded semiconductor films comprising selenium with highest efficiency photovoltaic device characteristics.    DETAILED DESCRIPTION - Selenium ink comprises as initial components: selenium component comprising selenium; an organic chalcogenide component comprising substituted hydrocarbon compounds of formula (RZ-Z1R1) (I) or (R2-SH) (II); and a liquid carrier, where the selenium ink is a stable dispersion and free of hydrazine and hydrazinium, and comprises selenium ( less than or equal to 1 wt.%).    Z, Z1 = S, Se or Te;    R = H, 1-20C alkyl, 6-20C aryl, 1-20C alkylhydroxy, arylether or alkylether; and    R1, R2 = 1-20C alkyl, 6-20C aryl, 1-20C alkylhydroxy, arylether or alkylether.    INDEPENDENT CLAIMS are also included for:    (1) preparing the selenium ink comprising: providing a selenium component comprising selenium; providing (I) or (II); providing the liquid carrier; combining the components; and heating the combination with agitation to produce a combined selenium/organic chalcogenide component, where the combined selenium/organic chalcogenide component is stably dispersed in the liquid carrier, and the selenium ink is hydrazine free and hydrazinium free; and    (2) depositing selenium on a substrate, comprising: providing a substrate; providing the selenium ink; applying the selenium ink to the substrate forming a selenium material on the substrate; and treating the selenium material to remove the liquid carrier depositing selenium on the substrate.