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2022 1

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Cu2Se 1

berzelianite 1

mechanochemical synthesis 1

nanocrystalline semiconductor 1

planetary ball mill 1

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Advantageous mechanochemical synthesis of copper(I) selenide semiconductor, characterization, and properties

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 3,   Pages 433-442 doi: 10.1007/s11705-021-2066-6

Abstract: Copper(I) selenide-nanocrystalline semiconductor was synthesized via one-step mechanochemical synthesis after 5 min milling in a planetary ball mill. The kinetics of synthesis was followed by X-ray powder diffraction analysis and specific surface area measurements of milled 2Cu/Se mixtures. The X-ray diffraction confirmed the orthorhombic crystal structure of Cu2Se with the crystallite size ~25 nm. The surface chemical structure was studied by X-ray photoelectron spectroscopy, whereby the binding energy of the Cu 2p and Se 3d signals corresponded to Cu+ and Se2– oxidation states. Transmission electron microscopy revealed agglomerated nanocrystals and confirmed their orthorhombic structure, as well. The optical properties were studied utilizing ultraviolet-visible spectroscopy and photoluminescence spectroscopy. The direct bandgap energy 3.7 eV indicated a blue-shift phenomenon due to the quantum size effect. This type of Cu2Se synthesis can be easily adapted to production dimensions using an industrial vibratory mill. The advantages of mechanochemical synthesis represent the potential for inexpensive, environmentally-friendly, and waste-free manufacturing of Cu2Se.

Keywords： Cu2Se     berzelianite     nanocrystalline semiconductor     mechanochemical synthesis     planetary ball    

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Advantageous mechanochemical synthesis of copper(I) selenide semiconductor, characterization, and properties

Journal Article