title: High-throughput characterization of the Seebeck coefficient of a-(Cr(1-x)Si(x))(1-y)O(y) thin film materials libraries as verification of the extended thermopower formula.
abstract: In a previous paper (Sonntag 2010 J. Phys.: Condens. Matter 22 235501) the classical thermopower formula has been argued to be incomplete, because it only takes into account the scattering properties of the carriers, but not the temperature dependence of the electrochemical potential μ caused by variation of the carrier density and/or band edge shift with temperature T. This argument is now checked experimentally by high-throughput measurements of the thermopower (Seebeck coefficient) S of a-(Cr(1-x)Si(x))(1-y)O(y) thin film materials libraries. The concentration dependences of S differ depending on whether the measurements are done with the complete film (where x ranges continuously from x≈0.3 to 0.8; y≈0.1-0.2) or with the separated pieces (each piece with another average value of x). These differences are especially large if, in addition, an oxygen gradient is present.
authors.affiliation: MEAS Deutschland GmbH, Hauert 13, D-44227 Dortmund, Germany. joachim.sonntag@meas-spec.com
authors.forename: Joachim
authors.initials: J
authors.lastname: Sonntag
authors.forename: Pawel
authors.initials: P
authors.lastname: Ziolkowski
authors.forename: Alan
authors.initials: A
authors.lastname: Savan
authors.forename: Michael
authors.initials: M
authors.lastname: Kieschnick
authors.forename: Alfred
authors.initials: A
authors.lastname: Ludwig