Used as a precursor in the synthesis of semiconductor materials, particularly in the production of copper indium gallium selenide (CIGS) thin-film solar cells. It serves as a convenient source of selenium in controlled chemical reactions, enabling uniform deposition of selenide layers. Also employed in the fabrication of quantum dots for optoelectronic applications and in some cases as a reagent in organic synthesis for introducing selenium into molecules. Its solution form allows for easy handling and precise dosing in industrial and laboratory settings.