Lead selenide (PbSe), or lead(II) selenide, a selenide of lead, is a semiconductor material. It forms cubic crystals of the NaCl structure; it has a direct bandgap of 0.27 eV at room temperature. (Note that incorrectly identifies PbSe and other IV–VI semiconductors as indirect gap materials.) It is a grey crystalline solid material. It is used for manufacture of infrared detectors for thermal imaging , operating at wavelengths between 1.5–5.2 ?m. It does not require cooling, but performs better at lower temperatures. The peak sensitivity depends on temperature and varies between 4–4.7 ?m.

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