Solvothermal preparation, processing, and characterization of nanocrystalline CuIn1-xAlxSe2 materials

Christopher L. Exstrom, Jiří Olejníček, Scott A. Darveau, Anatole Mirasano, David S. Paprocki, Megan L. Schliefert, Matt A. Ingersoll, Laura E. Slaymaker, R. J. Soukup, N. J. Ianno, C. A. Kamler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We report solvothermal preparations of nanocrystalline CuIn 1-xAlxSe2 materials prepared from the reaction of Se, CuX2 (X = Cl- or stearate), InCl3, and Al(oleate)3 in refluxing oleylamine for 30 minutes to 3 hours. Scanning electron microscopy (SEM) images reveal morphologies consisting of hexagonal plates (100-400 nm diameter) with smaller isomorphic nodules. Micro-Raman spectroscopy, x-ray diffraction, and optical bandgap data are consistent with Al3+ incorporation into the chalcopyrite structure. For aluminum-containing reactions, product Al/(In+Al) ratios are estimated to be between 0.15 and 0.35 regardless of the indium-aluminum stoichiometry employed in the reaction. When Se is added to the reaction last, the reaction pathway involves an early-formed Cu2-xSe(s) intermediate that appears to react with Inand Al-containing species simultaneously. This intermediate is avoided when heating InCl3, Al(oleate)3, and Se together prior to Cu addition, but the final product includes Se contamination that must be removed or reacted by annealing.

Original languageEnglish (US)
Title of host publicationThin-Film Compound Semiconductor Photovoltaics - 2009
Pages153-158
Number of pages6
StatePublished - 2010
Event2009 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 13 2009Apr 17 2009

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1165
ISSN (Print)0272-9172

Conference

Conference2009 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period4/13/094/17/09

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Exstrom, C. L., Olejníček, J., Darveau, S. A., Mirasano, A., Paprocki, D. S., Schliefert, M. L., Ingersoll, M. A., Slaymaker, L. E., Soukup, R. J., Ianno, N. J., & Kamler, C. A. (2010). Solvothermal preparation, processing, and characterization of nanocrystalline CuIn1-xAlxSe2 materials. In Thin-Film Compound Semiconductor Photovoltaics - 2009 (pp. 153-158). (Materials Research Society Symposium Proceedings; Vol. 1165).