PbSe materials are widely researched and utilized in visible-infrared photodetectors,
displays, transistors, thermoelectric devices, and photovoltaics. However, the instability of
PbSe limits practical utilization. Understanding the decomposition mechanisms of PbSe
enables the guiding of targeted design to improve its stability. Here, we studied the
decomposition process of PbSe in water, which is exposed to air, by using ex-situ and semi
in situ transmission electron microscope (TEM), energy-dispersive X-ray spectroscopy …