Germanium Antimony Telluride Sputtering Targets (Ge2Sb2Te5)

GeSbTe is a ternary compound of germanium, antimony, and tellurium, with the composition GeTe-Sb2Te3. This material is not stable because of its low activation energy. On the other hand, materials with good amorphous stability like GeTe has slow crystallization speed because of its high activation energy. In its stable state, crystalline GeSbTe has two possible configurations, hexagonal and a metastable face-centered cubic (FCC) lattice. GeSbTe also has many vacancy defects in the lattice, 20 to 25%, depending on the specific GeSbTe compound. GeSbTe is generally P-type, and there are many electronic states in the band-gap accounting for acceptor and donor like traps. GeSbTe has two stable states, crystalline and amorphous.