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Synthesis of Water-Soluble Antimony Sulfide Quantum Dots and Their Photoelectric Properties.
Nanoscale Research Letters 2018 January 16
Antimony sulfide (Sb2 S3 ) has been applied in photoelectric devices for a long time. However, there was lack of information about Sb2 S3 quantum dots (QDs) because of the synthesis difficulties. To fill this vacancy, water-soluble Sb2 S3 QDs were prepared by hot injection using hexadecyltrimethylammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) mixture as anionic-cationic surfactant, alkanol amide (DEA) as stabilizer, and ethylenediaminetetraacetic acid (EDTA) as dispersant. Photoelectric properties including absorbing and emission were characterized by UV-Vis-IR spectrophotometer and photoluminescence (PL) spectroscopic technique. An intensive PL emission at 880 nm was found, indicating Sb2 S3 QDs have good prospects in near-infrared LED and near-infrared laser application. Sb2 S3 QD thin films were prepared by self-assembly growth and then annealed in argon or selenium vapor. Their band gaps (E g s) were calculated according to transmittance spectra. The E g of Sb2 S3 QD thin film has been found to be tunable from 1.82 to 1.09 eV via annealing or selenylation, demonstrating the good prospects in photovoltaic application.
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