Sol-gel assisted preparation and characterization of silver indium diselenide powders
Journal
Journal of Alloys and Compounds
Journal Volume
509
Journal Issue
36
Pages
8927-8932
Date Issued
2011
Author(s)
Abstract
AgInSe2 powders were successfully prepared via mixing sol-gel derived precursors, followed by a selenization process. To obtain the pure AgInSe2 compound, excess amounts of In3+ ions were added into the starting solution to compensate the loss of In2O3 during the selenization process. A figure that depicts the relationship between the resultant compounds and different selenization temperatures was constructed according to the formed phases. The Raman spectrum and Rietveld refinement confirmed that the prepared AgInSe2 belonged to the chalcopyrite structure. With increasing selenization temperatures, the AgInSe2 powder particle sizes as well as the crystallinity increased significantly. The AgInSe2 formation mechanism during the selenization process is proposed as a two-step process. Ag2Se is formed in the first step and then induces the second-step reaction to produce AgInSe2. The sol-gel route with a selenization process is introduced as a new approach to fabricate pure AgInSe2 powders for use in thin-film solar cells. ? 2011 Elsevier B.V. All rights reserved.
Subjects
AgInSe2
Chalcopyrite
Sol-gel
Type
journal article