Lee, Yeon Soo Cha, Ji-Hyun Min, Byoung Koun Jung, Duk-Young 2024-01-20T09:34:02Z 2024-01-20T09:34:02Z 2021-09-05 2014-06 0927-0248 https://pubs.kist.re.kr/handle/201004/126742 This work reports on the syntheses of copper-gallium bimetallic nanoparticles by ultrasound-assisted chemical reduction method in alcohol solutions to prepare CuGaS2 thin films. Gallium metal (Ga) in the form of pellet was dispersed in tetraethylene glycol by ultrasonic treatment. The chemical reduction of copper sulfate (CuSO4) into copper metal by NaBH4 at the surface of the Ga droplets enabled the formation of Ga-Cu core-shell structure. The Ga droplets with submicrometer size were homogenously coated with similar to 40-nm Cu nanoparticles. The exothermic transition of the Ga-Cu core-shell nanocomposite materials Occurred at 485 degrees C, which corresponds to the crystalline phase formation of gamma-Cu9Ga4. Ga-Cu nanocomposites with a 1:1 ratio were deposited onto molybdenum substrate via electrophoretic deposition method as a precursor of CuGaS2, a p-type semiconductor. Mechanical pressing and sulfurization provided dense CuGaS2 thin films with good crystallinity and high phase purity. (C) 2014 Elsevier B.V. All rights reserved. English ELSEVIER LATTICE-VIBRATIONS LOW-COST CRYSTALS GALLIUM ALLOYS GROWTH Electrophoretic deposition of Ga-Cu core-shell nanocomposites for CuGaS2 thin films Article 10.1016/j.solmat.2014.02.040 1 SOLAR ENERGY MATERIALS AND SOLAR CELLS, v.125, pp.138 - 144 SOLAR ENERGY MATERIALS AND SOLAR CELLS 125 138 144 scie scopus 000336338600021 2-s2.0-84896908422 Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Energy & Fuels Materials Science Physics Article LATTICE-VIBRATIONS LOW-COST CRYSTALS GALLIUM ALLOYS GROWTH CIGS Photovoltaic cells Precursor Core-shell Chemical reductions