Hot injection synthesis of CuInS2 nanocrystals using metal xanthates and their application in hybrid solar cells

Verena Perner, Thomas Rath, Franz Pirolt, Otto Glatter, Ilse Letofsky-Papst, Peter Zach, Mathias Hobisch, Birgit Kunert, Gregor Trimmel

Research output: Contribution to journalArticlepeer-review


Copper indium sulfide (CuInS2) nanocrystals with a size of 3–4 nm and a chalcopyrite crystal structure were synthesized from copper and indium xanthates as precursors in a hot injection synthesis performed at a temperature of 200 °C. Dioleamide molecules served as stabilizing ligands and were exchanged to 1-hexanethiol after the synthesis. TEM images reveal that after the ligand exchange process, the inter-particle distance is significantly reduced and the nanocrystals agglomerate slightly, which is also indicated by small angle X-ray scattering and AFM measurements. Information about charge transfer between the conjugated polymer PCDTBT and the nanocrystals was gained from photoluminescence quenching measurements. Furthermore, the prepared CuInS2 nanoparticles with an optical band gap of 1.57 eV were applied as acceptors in polymer/nanocrystal bulk heterojunction solar cells and their performance was evaluated. The obtained solar cells showed high open circuit voltages up to 730 mV and overall power conversion efficiencies of 0.23%.
Original languageEnglish
Pages (from-to)356-363
Number of pages8
JournalNew Journal of Chemistry
Issue number1
Publication statusPublished - 7 Jan 2019

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemistry(all)
  • Catalysis

Fields of Expertise

  • Advanced Materials Science

Treatment code (Nähere Zuordnung)

  • Experimental

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