Thermoelectric properties and electronic structures for impurity-doped Bi2Te3

We studied the effects of Cu- and Cu₂O doped into both n- and p-type Bi₂Te₃ for thermoelectric properties as well as X-ray photoelectron spectrum (XPS) evaluation followed by the calculated XPS, especially focused on the valence electrons. Cu-doping affected the Fermi level electronic structure of Bi₂Te₃ . Furthermore, the thermoelectric properties of electric resistivity, Seebeck coefficient and thermal conductivity were also affected by Cu doping, where the n-type Cu-doped Bi₂Te₃ indicated ZT; 0.7. There were not much different effects between Cu- and Cu₂O-doping