Zn0.75Hg0.25Se1

Zn₀.₇₅Hg₀.₂₅Se is a narrow-bandgap II-VI semiconductor alloy combining zinc selenide with mercury selenide, tuning the electronic properties between the two end compounds. This material is primarily of research interest for infrared optoelectronics and sensing applications, where the mercury content shifts the bandgap into the mid-infrared (2–5 μm) region; it represents an experimental composition within the well-established HgCdSe and ZnHgSe material families developed since the 1980s for thermal imaging, FLIR systems, and spectroscopy. While less commercially prevalent than cadmium-based alternatives due to mercury's toxicity concerns and processing complexity, zinc-mercury-selenide compositions remain relevant in specialized defense, medical thermal imaging, and environmental monitoring systems where mid-IR sensitivity is critical.