Used in semiconductor manufacturing as a precursor for depositing selenium-containing thin films, particularly in the production of photovoltaic cells and solar panels. Plays a role in chemical vapor deposition (CVD) processes due to its volatility and ability to deliver selenium in a controlled manner. Also investigated in research settings for its potential in synthesizing nanomaterials with electronic and optical properties. Limited use in organic synthesis as a selenium transfer agent. Due to its high toxicity and strong odor, handling requires strict safety controls.