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Issue 1, 2019
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Hot injection synthesis of CuInS2 nanocrystals using metal xanthates and their application in hybrid solar cells

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Abstract

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%.

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

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Publication details

The article was received on 22 Sep 2018, accepted on 21 Nov 2018 and first published on 23 Nov 2018


Article type: Paper
DOI: 10.1039/C8NJ04823A
New J. Chem., 2019,43, 356-363
  • Open access: Creative Commons BY license
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    Hot injection synthesis of CuInS2 nanocrystals using metal xanthates and their application in hybrid solar cells

    V. Perner, T. Rath, F. Pirolt, O. Glatter, K. Wewerka, I. Letofsky-Papst, P. Zach, M. Hobisch, B. Kunert and G. Trimmel, New J. Chem., 2019, 43, 356
    DOI: 10.1039/C8NJ04823A

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