Room temperature non-vacuum preparation of nanocrystalline CuInSe 2 employing aqueous solvents

Christopher L. Exstrom, Scott A. Darveau, Matt A. Ingersoll, Matthew R. Jensen, Chelsey Cook, Laura E. Slaymaker, Rodney J. Soukup, Natale J. Lanno

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


A new room-temperature, aqueous solution-based preparation method for chalcopyrite CuInSe2 has been developed. Using 10% aqueous ethylenediamine as a solvent, the slow addition of Cu(NO3) 2 to a mixture of indium(III) acetate, elemental Se, and sodium thioglycolate results in the formation of CuInSe2 as characterized by Raman spectroscopy. During this reaction, a kinetically-stable Cu 2-xSe(s) intermediate initially forms followed by slow conversion to CuInSe2 that likely involves a direct Cu2-xSe + In 2Se3 solid-state reaction. The ethylenediamine in the reaction mixture acts as a complexing agent, establishing equilibria that can be in competition with Cu2-xSe(s) formation, limiting particle size and accelerating rates of reaction with In. Over several hours, the CuInSe 2 material undergoes a phase decomposition that can be reversed by annealing at 550 °C. Attempts to prepare CuIn1-xGa xSe2 and CuGaSe2 via this method result primarily in CuInSe2 and Cu2-xSe products, respectively, with nearly all gallium staying in the solution phase.

Original languageEnglish (US)
Title of host publicationProgram - 35th IEEE Photovoltaic Specialists Conference, PVSC 2010
Number of pages4
StatePublished - 2010
Event35th IEEE Photovoltaic Specialists Conference, PVSC 2010 - Honolulu, HI, United States
Duration: Jun 20 2010Jun 25 2010

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371


Other35th IEEE Photovoltaic Specialists Conference, PVSC 2010
Country/TerritoryUnited States
CityHonolulu, HI

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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