Synthesis of colloidal CuInSe2 nanocrystals films for photovoltaic applications
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| Title: | Synthesis of colloidal CuInSe |
|---|---|
| Authors: | de Kergommeaux, Antoine1,2 antoine@dekergommeaux.com, Fiore, Angela1, Bruyant, Nicolas1, Chandezon, Frédéric1, Reiss, Peter1 peter.reiss@cea.fr, Pron, Adam1, de Bettignies, Rémi2, Faure-Vincent, Jérôme1 |
| Source: | Solar Energy Materials & Solar Cells. May2011 Supplement, Vol. 95, p39-43. 5p. |
| Subject Terms: | *Photovoltaic power generation, *Solar cells, *Chemical reactions, Copper indium selenide, Nanocrystals, Thin films, Coating processes, Schottky barrier diodes |
| Abstract: | Abstract: We synthesise 7nm CuInSe2 nanocrystals of low size and shape dispersion using copper(I) chloride, indium(III) chloride and selenourea as the precursors. The obtained nanocrystals are deposited on indium tin oxide (ITO) covered glass by means of layer-by-layer dip-coating. After each deposition step, a ligand exchange process with 1,2-ethanedithiol (EDT) is carried out. The new ligands interconnect the nanocrystals, which therefore become insoluble during subsequent dip-coating steps. Furthermore, the small EDT molecules replace the long insulating alkyl chains of the oleylamine stabilizing ligands used during the synthesis. I/V measurements of a 1μm thick film sandwiched between the ITO substrate and an aluminium electrode show a current density of 1μA/cm2 at 1V in the dark, which increases to 16μA/cm2 under illumination with white light. [Copyright &y& Elsevier] |
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| Database: | GreenFILE |
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