Synthesis by a Solvothermal Route and Characterization of CuInSe2 Nanowhiskers and Nanoparticles

Abstract

CuInSe2 is a leading material for high-efficiency and radiation-hard solar cell applications. The device properties of CuInSe2-based solar cells are known to be critically influenced by their stoichiometric compositions, defect chemistry, and structure; however, with the current methods of synthesis high temperature and pressure are needed to maintain satisfactory stoichiometry. Reported here is a solvothermal route to chalcopyrite CuInSe2 nanocrystals using alkylamines as a solvent. High-quality CuInSe2 nanowhiskers and spherical nanoparticles with stoichiometric composition were produced at a greatly reduced temperature.