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

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

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 poly...

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Bibliographic Details
Main Authors: Mhaisalkar, Subodh Gautam, Lim, Hui Min, Tan, Jia Yi, Magdassi, Shlomo, Wong, Lydia H., Batabyal, Sudip Kumar
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2014
Subjects:
DRNTU::Engineering::Materials::Nanostructured materials
Online Access:https://hdl.handle.net/10356/105140
http://hdl.handle.net/10220/20490
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Institution: Nanyang Technological University
Language: English
Description
Summary: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 %.

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