Cu-In-Ga-Se Nanoparticle Colloids as Spray Deposition Precursors for Cu(In,Ga)Se2 Solar Cell Materials

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Abstract

The use of nanoparticle colloids for spray deposition of Cu(In,Ga)Se2 (CIGS) precursor films and subsequent fabrication of CIGS solar cells has been investigated. According to this approach, amorphous Cu-In-Ga-Se nanoparticle colloids were first prepared by reacting a mixture of CuI, InI3, and GaI3 in pyridine with Na2Se in methanol at reduced temperature. Purified colloid was sprayed onto heatedmolybdenum-coated sodalime glass substrates to form Cu-In-Ga-Se precursor films. After thermal processing of the precursor films under a selenium ambient, CIGS solar cells were fabricated. Cu-In-Ga-Se colloids and films were characterized by inductively coupled plasma atomic emission spectroscopy, thermogravimetric analysis, transmission electron microscopy, x-ray diffraction, scanning electronmicroscopy, and Auger electron spectroscopy. Standard current voltage characterization was performed on the CIGS solar cell devices with the best film exhibiting a solar conversion efficiency of 4.6%.
Original languageAmerican English
Pages (from-to)433-437
Number of pages5
JournalJournal of Electronic Materials
Volume27
Issue number5
DOIs
StatePublished - 1998

NREL Publication Number

  • NREL/JA-520-25639

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