Laura Elisa Valle Rios

ESR 1.4 Laura Elisa Valle Rios. PhD student at the Free University of Berlin

She graduated in 2007 as a chemical engineer in the Technological Institute of Madero City, in Mexico. In 2011 she obtained a Master of Science in Engineering called “Materials and processes of suitable Energetics hosted” at the Tallinn University of Technology in Estonia. She combined her master studies with a research assistant job in the Department of Material Science at its center of excellence in solar energy materials. Her research at this phase centered on the chemical bath deposition of intrinsic Zinc Oxide as a window layer for CZTS monograin solar cells.

Her input in the Kestcell project starts with the solid state synthesis of stoichiometric and off-stoichiometric kesterites powder samples. The use of X-Rays and Neutron diffraction techniques, complementary with chemical characterization and Rietveld analysis are performed in order to determinate its crystal structure, cation distribution, concentration and type of point defects, which are key aspects for the understanding of the solar cell performance.

 Papers:

L.E. VALLE RIOS, K.Neldner, G. Gurieva, S. Schorr. Existence of off-stoichiometric single phase kesterite. Journal of Alloys and Compounds. (2016), p. 408-413. DOI:10.1016/j.jallcom.2015.09.19

D.M. Többens, R. Gundera, G. Gurievaa, Ju. Marquardta, K. Neldnera, L. E. Valle-Rios, S. Zander and S. Schorr. “Quantitative anomalous powder diffraction analysis of cation disorder in kesterite semiconductors”, Powder Diffraction, 31, pp 168-175, 2016. DOI:10.1017/S0885715616000191.

Conferences:

  1.  L.E. Valle-Rios, G. Gurieva, S. Schorr, Structural characterization of off-stoichiometric Cu2ZnSnSe4. In: 4th European Kesterite workshop. Berlin, Germany,2013. (Poster)
  2. L.E. Valle-Rios, Susan Schorr, Chemical and structural characterization of off-stoichiometric Cu2ZnSnSe4. In: 22nd Annual Conference of the German Crystallographic Society (DGK) Berlin, Germany, 2014. (Poster).
  3. D.M. Toebbens, K.Neldner, L.E. Valle-Rios, S.Schorr. Cation disorder in CZTS materials from anomalous diffraction at KMC-2 (BESSY)In: 23rd Congress and General Assembly of the International Union of Crystallography , Montreal, Canada, 2014 (Poster).
  4. L.E. Valle-Rios, G. Gurieva, S. Schorr, Chemical and structural characterization of off-stoichiometric Cu2ZnSnSe4. In:7th International Conference on Materials Science and Condensed Matter Physics (MSCMO), Chisinau, Moldova, 2014 (Poster).
  5. L.E. Valle-Rios, G. Gurieva, S. Schorr, Chemical and structural characterization of off-stoichiometric Cu2ZnSnSe4. In 5th European Kesterite Workshop. Tallinn, Estonia, 2014 (Poster).
  6. L.E. Valle-Rios, G. Gurieva, S. Schorr, Chemical and structural characterization of off-stoichiometric Cu2ZnSnSe4. In Autumn School on Microstructural Characterization and Modelling of Thin-Film Solar Cells – Potsdam, Germany, 2014 (Poster)
  7. L.E. Valle-Rios, K. Neldner, R. Gunder,S. Zander, D.M. Toebbens, S.Schorr, Structural characterization of off-stoichiometric Cu2ZnSnSe4 (CZTSe) from anomalous X-ray diffraction at KMC-2 (BESSY II). In: Sixth Joint BER II and BESSY II User Meeting, Berlin, Germany, 2014 (Poster)
  8. D.M Toebbens, S. Zander, K. Neldner, L.E. Valle-Rios, R. Gunder, G. Galina, S. Schorr, Punktdefekte und Kationenverteilung in CZTS-Materialien aus anomaler Beugung an KMC-2 (BESSY II). In: German Conference for Research with Synchrotron Radiation, Neutrons and Ion Beams at Large Facilities (SNI) Bonn, Germany, 2014 (Oral).
  9. L.E. Valle-Rios,  D.M. Toebbens, S.Schorr, Chemical and structural characterization of off-stoichiometric Cu2ZnSnSe4. In 23rd Annual Conference of the German Crystallographic Society (DGK), Göttingen, Germany, 2015 (Poster).
  10. L.E. Valle-Rios, G. Gurieva, D.M. Toebbens, P.Whitfield, S.Schorr, Chemical and structural characterization of off-stoichiometric Cu2ZnSnSe4. In Materials research society (MRS) – spring meeting, San Francisco, USA, 2015 (Poster).
  11. D.M. Toebbens, L.E Valle-Rios,K. Neldner,G. Gurieva, S. Zander, R. Gunder, S.Schorr,  Quantitative cation occupancies in CZTS materials by anomalous powder diffraction. In Materials research society (MRS) – spring meeting, San Francisco, USA, 2015 (Poster).
  12. Valle-Rios, Laura-Elisa; Gurieva, Galina; Schorr, Susan: Intrinsic point defects formation in off-stoichiometric CZTSe kesterite type compounds.In 29th European Crystallographic Meeting Rovinj, Croatia (ECM),2015 (poster)
  13. Valle-Rios, Laura-Elisa; Gurieva, Galina; Schorr, Susan: Synthesis and structural characterization of off-stoichiometric Cu2ZnSnSe4. InGeoBerlin 2015 Berlin, (Talk)
  14. Valle-Rios, Laura-Elisa; Gurieva, Galina; Schorr, Susan: Intrinsic point defects formation in off-stoichiometric CZTSe kesterite type compounds.In 6th European Kesterite Workshop. Newcastle upon Tyne, UK, 2015 (poster)
  15. Valle-Rios, Laura-Elisa; Gurieva, Galina; Franz, Alexandra; Whitfield, Pamela; Többens, Daniel; Schorr, Susan-point defects formation in off-stoichiometric CZTSe kesterite type compounds.InSeventh Joint BER II and BESSY II User Meeting Berlin, 2015 (poster)
  16. Valle-Rios, Laura-Elisa; Gurieva,Galina; Schorr, Susan:Intrinsic point defects formation in off-stoichiometric CZTSe kesterite type compounds. In Conference “From the witches cauldrons in material sciences“ , Goslar,Germany, 2016 (poster)
  17. Gurieva, G.; Valle-Rios, L.E.; Neldner, K.; Többens, D.M.; Zander, S.; Schorr, S.: Structural characterisation of stoichiometric and off-stoichiometric Cu2ZnSn(SxSe1-x)4 by neutron diffraction In 29th European Crystallographic Meeting Rovinj, Croatia (ECM),2015. (Poster)
  18. Schorr, Susan; Gurieva, Galina; Neldner, Kai; Valle-Rios, Laura-Elisa: Point defect characteristics in quaternary chalcogenide compound semiconductors: insights by neutron diffraction.In ,VI European Conference on neutron Scattering Zaragoza, Spanien, 2015. (Poster)
  19. Susan Schorr, Galina Gurieva, Laura Elisa Valle Rios, Kai Neldner: A structural perception about intrinsic point defects in kesterite type chalcogenides,In ,24th Annual Conference of the German Crystallographic Society (DGK), Stuttgart, Germany 2016.(Oral)
  20. Susan Schorr; Valle-Rios Laura-Elisa; Neldner Kai; Gurieva Galina: Off-Stoichiometry and Point Defects in Kesterites, In Materials research society (MRS) – spring meeting 2016, Phoenix, USA,2016. (Oral)
  21. Th. Dittrich, L.E Valle-Rios, G.Gurieva, S.Kapil, N.Rujismaphan, S.Schorr: Surface Photovoltage Study of Cu1.95Zn1.1Sn0.96Se4 single phase powder, In 32nd European Photoltaic Solar Energy conference and Exhibition, Munich, Germany, 2016.