Photoactive nanocrystals by low-temperature welding of copper sulfide nanoparticles and indium sulfide nanosheets

Hui Min Lim*, Jia Yi Tan, Sudip K. Batabyal, Shlomo Magdassi, Subodh G. Mhaisalkar, Lydia H. Wong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We successfully utilize the concept of coalescence and room-temperature sintering to prepare morphologically different nanoparticles. n-Type chalcogenide (CuIn5S8) nanocrystals are synthesized at room temperature by simple mixing of oppositely charged precursor nanoparticles. The coalescence of polycation-coated CuS nanoparticles and negatively charged In2S3 nanoplates is driven by close contact of the particles due to electrostatic interactions. Analysis by X-ray diffraction, transmission electron microscopy (TEM) imaging, and Raman spectroscopy confirms the formation of single-phase CuIn5S8 without traceable secondary phase. In a photovoltaic device, the use of the coalesced particles yields a power conversion efficiency of 1.8%.

Original languageEnglish
Pages (from-to)3290-3294
Number of pages5
JournalChemSusChem
Volume7
Issue number12
DOIs
StatePublished - Dec 2014

Bibliographical note

Publisher Copyright:
© 2014 Wiley-VCH Verlag GmbH & Co. KGaA.

Keywords

  • Chalcogens
  • Coalescence
  • Copper
  • Solar cells
  • Welding

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