Oxyselenide
![Figure 1: Crystal structure of the BiCuSeO with a layered ZrSiCuAs structure](/Images/godic/202501/31/Crystal_structure_of_the_BiCuSeO_with_a_layered_ZrSiCuAs_structure0148.png")
![Figure 2: Some recently discovered oxyselenide structures crystallize in such a way that the metal oxide layers (a) and the metal selenide layers (b) form an alternating pattern (c). Color code: Yellow − Strontium; Pink − Cobalt; Blue − Oxygen; Green − Selenium; Orange − Copper](/Images/godic/202501/31/Recently_Discovered_Oxyselenide_Structures0148.png")
![Figure 3: Orthorhombic structure of β-La2O2MnSe2 at low temperatures.](/Images/godic/202501/31/Beta_oxyselenide0148.png")
![Figure 4: Comparison of figure-of-merit ZT compounds Bi1-xMxCuSeO. Higher ZTs indicate more efficient energy conversions.](/Images/godic/202501/31/Comparison_of_figure-of-merit_ZT_compounds_Bi1-xMxCuSeO.0149.png")
Oxyselenides are a group of chemical compounds that contain oxygen and selenium atoms (Figure 1). Oxyselenides can form a wide range of structures in compounds containing various transition metals, and thus can exhibit a wide range of properties. Most importantly, oxyselenides have a wide range of thermal conductivity, which can be controlled with changes in temperature in order to adjust their thermoelectric performance. Current research on oxyselenides indicates their potential for significant application in electronic materials.