Physics – Condensed Matter – Materials Science
Scientific paper
2007-03-20
Physics
Condensed Matter
Materials Science
accepted for publication in PRB
Scientific paper
10.1103/PhysRevB.75.195203
The structures and thermoelectric properties of the (Bi2)m(Bi2Te3)n homologous series, derived from stacking hexagonal Bi2 and Bi2Te3 blocks, are reported. The end-members of this series are metallic Bi and semiconducting Bi2Te3; nine members of the series have been studied. The structures form an infinitely adaptive series and a unified structural description based on a modulated structure approach is presented. The as-synthesized samples have thermopowers (S) that vary from n-type for Bi2Te3 to p-type for phases rich in Bi2 blocks but with some Bi2Te3 blocks present, to n-type again for Bi metal. The thermoelectric power factor (S2/rho) is highest for Bi metal (43 muW/K2 cm at 130 K), followed by Bi2Te3 (20 muW/K2 cm at 270 K), while Bi2Te (m:n = 5:2) and Bi7Te3 (m:n = 15:6) have 9 muW/K2 cm (at 240 K) and 11 muW/K2 (at 270 K), respectively. The results of doping studies with Sb and Se into Bi2Te are reported.
Bos J.-W. G.
Cava Robert. J.
Lee Michael H.
Ong N. P.
Zandbergen Henny W.
No associations
LandOfFree
The structures and thermoelectric properties of the infinitely adaptive series (Bi2)m(Bi2Te3)n does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The structures and thermoelectric properties of the infinitely adaptive series (Bi2)m(Bi2Te3)n, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The structures and thermoelectric properties of the infinitely adaptive series (Bi2)m(Bi2Te3)n will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-123192