Single-source precursor synthesis of quinary AgInGaZnS QDs with tunable photoluminescence emission
Galiyeva P. Rinnert H. Balan L. Alem H. Medjahdi G. Uralbekov B. Schneider R.
1 October 2021Elsevier B.V.
Applied Surface Science
2021#562
A single source molecular precursor synthesis of new quinary Ag-In-Ga-Zn-S (AIGZS) QDs is presented. Dithiocarbamate complexes with varied Ag/In/Ga/Zn ratios were prepared from AgNO3, In(NO3)3, Ga(NO3)3 and Zn(diethyldithiocarbamate)2. The thermal decomposition of these complexes at 220 °C in oleylamine produces AIGZS QDs emitting from the visible to the near-infrared region and with photoluminescence quantum yields (PL QYs) up to 48.3%. For AIGZS QDs prepared with a (Ag + In + Ga)/Zn molar ratio of 1, intragap states likely involving Ag+ ions are responsible of the PL emission and the PL lifetime could reach 278 ns. A marked increase of the PL lifetime (up to 915 ns) was observed when decreasing the (Ag + In + Ga)/Zn molar ratio to 0.5. The optical properties of AIGZS QDs could be maintained after transfer in aqueous solution. AIGZS should be of high potential for various applications due to their PL emission tunability and high PL QYs.
AgInGaZnS quantum dots , Dithiocarbamate complexes , Photoluminescence , Single source precursor synthesis
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Université de Lorraine, CNRS, LRGP, Nancy, F-54000, France
Université de Lorraine, CNRS, IJL, Nancy, F-54000, France
CEMHTI-UPR 3079 CNRS, Site Haute Température, 1D avenue de la Recherche Scientifique, Orléans, 45071, France
Al-Farabi Kazakh National University, Al-Farabi Av., 71, Almaty, 050040, Kazakhstan
Université de Lorraine
Université de Lorraine
CEMHTI-UPR 3079 CNRS
Al-Farabi Kazakh National University
10 лет помогаем публиковать статьи Международный издатель
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