Synthesis and Characterization of Semiconductor Nanoparticles CuInS₂ QDs/TiO₂

Abstract:

Synthesis and characterization of CuInS₂ quantum dots (QDs) and CuInS₂ QDs/TiO₂ with varied temperature reaction (200; 215°C) and TiO₂ precursor concentrations was conducted using wet chemical method. The as-synthesized CIS with higher reaction temperature exhibited deep-red emissions and enhanced the photoluminescence (PL) intensity, indicating the reduction of surface defects. With the addition of TiO₂ precursor, particle size decreased, bandgap energy increased, and the absorption edge shifted to the blue region. The UV-Vis absorption shifting expands the light-absorbing region. CIS hybridized with 150 μl TiO₂ precursor (CIS-TO 150) has particle size 2.15 nm with tetragonal chalcopyrite crystal structure and bandgap energy 2.72 eV. This property gives a great potential for wide range of application via photocatalytic mechanism under visible light.

• Periodical: Materials Science Forum (Volume 1051)
• Pages: 10-16
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1051.10
• Online since: January 2022
• Authors: Nur Hanifah, Farhan Aryo Hutomo, Fajri Malik Ammrulloh, Muhammad Afdhel Refialdi, Widyastuti Widyastuti, Azzah Dyah Pramata*
• Keywords: CuInS₂ QDs, Nanoparticles, Semiconductor, TiO₂

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