@article{MazzioKojdaRubioGoveaetal.2020,
  author    = {Mazzio, Katherine A. and Kojda, Sandrino Danny and Rubio-Govea, Rodrigo and Niederhausen, Jens and Ryll, Britta and Raja-Thulasimani, Monika and Habicht, Klaus and Raoux, Simone},
  title     = {P-type-to-n-type transition in hybrid AgxTe/PEDOT:PSS thermoelectric materials via stoichiometric control during solution-based synthesis},
  series = {ACS applied energy materials},
  volume    = {3},
  journal   = {ACS applied energy materials},
  number    = {11},
  publisher = {ACS Publications},
  address   = {Washington, DC},
  issn      = {2574-0962},
  doi       = {10.1021/acsaem.0c01774},
  pages     = {10734 -- 10743},
  year      = {2020},
  abstract  = {This work demonstrates the production of high-performing p- type and n-type hybrid AgxTe/poly(3,4-ethylenedioxythiopene):polystyrene sulfonic acid (PE-DOT:PSS) thermoelectric materials from the same Te/PEDOT:PSS parent structure during aqueous-based synthesis. All samples were solution-processed and analyzed in thin- film architectures. We were able to demonstrate a power factor of 44 mu W m(-1) K-2 for our highest-performing n-type material. In addition, we were also able to realize a 68\% improvement in the power factor of our p-type compositions relative to the parent structure through manipulation of the inorganic nanostructure composition. We demonstrate control over the thermoelectric properties by varying the stoichiometry of AgxTe nanoparticles in AgxTe/PEDOT:PSS hybrid materials via a topotactic chemical transformation process at room temperature. This process offers a simple, low-temperature, and cost-effective route toward the production of both efficient n-type and p-type hybrid thermoelectric materials.},
  language  = {en}
}
@article{RyllSchmitzdeBooretal.2018,
  author    = {Ryll, Britta and Schmitz, Andreas and de Boor, Johannes and Franz, Alexandra and Whitfield, Pamela S. and Reehuis, Manfred and Hoser, Andreas and M{\"u}ller, Eckhard and Habicht, Klaus and Fritscht, Katharina},
  title     = {Structure, phase composition, and thermoelectric properties of YbxCo4Sb12 and their dependence on synthesis method},
  series = {ACS applied energy materials},
  volume    = {1},
  journal   = {ACS applied energy materials},
  number    = {1},
  publisher = {American Chemical Society},
  address   = {Washington},
  issn      = {2574-0962},
  doi       = {10.1021/acsaem.7b00015},
  pages     = {113 -- 122},
  year      = {2018},
  abstract  = {We present a combined microscopic and macroscopic study of YbxCo4Sb12 skutterudites for a range of nominal filling fractions, 0.15 < x < 0.75. The samples were synthesized using two different methods — a melt-quench-annealing route in evacuated quartz ampoules and a non-equilibrium ball-mill route — for which we directly compare the crystal structure and phase composition as well as the thermoelectric properties. Rietveld refinements of high-quality neutron powder diffraction data reveal about a 30-40\% smaller Yb occupancy on the crystallographic 2a site than nominally expected for both synthesis routes. We observe a maximum filling fraction of at least 0.439(7) for a sample synthesized by the ball-mill routine, exceeding theoretical predictions of the filling fraction limit of 0.2-0.3. A single secondary phase of CoSb2 is observed in ball-mill-synthesized samples, while two secondary phases, CoSb2 and YbSb2, are detected for samples prepared by the ampoule route. A detrimental influence of the secondary phases on the thermoelectric properties is observed for secondary-phase fractions larger than 8 wt \% regardless of the kind of secondary phase. The largest figure of merit of all samples with a ZT ∼ 1.0 at 723 K is observed for the sample with a refined Yb content of x2a = 0.159(3), synthesized by the ampoule route.},
  language  = {en}
}