HgIn2Se4

HgIn2Se4 is a ternary semiconductor compound combining mercury, indium, and selenium in a 1:2:4 stoichiometry, belonging to the chalcogenide semiconductor family. This material is primarily of research interest for infrared (IR) detection and optoelectronic applications, where its narrow bandgap and high atomic number enable sensitivity in the mid- to far-IR spectral regions. While less widely deployed than binary counterparts (HgCdTe, InSb), HgIn2Se4 and related mercury-indium compounds are explored as alternatives for thermal imaging, spectroscopy, and space-based sensing where cost or toxicity constraints make mercury-containing materials less favorable, though industrial adoption remains limited compared to mature IR detector technologies.