A Colloidal Synthesis Route Towards AgBiS2 Nanocrystals Based on Metal Xanthate Precursors

Efthymia Vakalopoulou, Daniel Knez, Marco Sigl, Gerald Kothleitner, Gregor Trimmel, Thomas Rath*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Silver bismuth sulfide (AgBiS2) is showing impressive thermoelectric and photovoltaic properties and has a high potential to replace toxic cadmium or lead containing semiconductors in many applications. Herein, we report on a synthesis route for AgBiS2 nanocrystals applying metal xanthates as precursors. Silver xanthates could not be used so far in solution-based syntheses for Ag-containing metal sulfide nanocrystals as they are typically insoluble in organic solvents. An investigation of the synthesis process revealed that even though the silver xanthate is not soluble in the used solvent mixture consisting of octadecene and oleylamine, the decomposition of both precursors and the formation of AgBiS2 nanocrystals is initiated already at room temperature by the amine functionality of the ligand. At room temperature, primary crystallite sizes of approximately 4 nm are observed and at a reaction temperature of 200 °C, the size of the AgBiS2 nanocrystals increases to 7–8 nm.

Original languageEnglish
Article numbere202200414
Issue number2
Publication statusPublished - Feb 2023


  • electron microscopy
  • metal sulfide
  • nanocrystal ink
  • nanoparticles
  • single source precursor

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Materials Chemistry

Fields of Expertise

  • Advanced Materials Science

Treatment code (Nähere Zuordnung)

  • Basic - Fundamental (Grundlagenforschung)


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