The Composition-Dependent Photoluminescence Properties of Non-Stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> Nanocrystals
A facile hot injection approach to synthesize high-quality non-stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals (NCs) in the size range of 2.8−3.1 nm was presented. The fluorescence spectra had single band gap features, an...
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MDPI AG
2019-07-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/10/7/439 |
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| author | Jian Feng Xiaosheng Yang Rong Li Xianjiong Yang Guangwei Feng |
| author_facet | Jian Feng Xiaosheng Yang Rong Li Xianjiong Yang Guangwei Feng |
| author_sort | Jian Feng |
| collection | DOAJ |
| description | A facile hot injection approach to synthesize high-quality non-stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals (NCs) in the size range of 2.8−3.1 nm was presented. The fluorescence spectra had single band gap features, and indicated the formation of alloy states rather than simple composite structures. The chemical compositions, photoluminescence (PL) emission wavelengths, and quantum yields of Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals were significantly influenced by the concentration of an organic capping agent. The appropriate proportion of 1-dodecanthiol in the precursor prevented the precipitation, increased the fluorescence quantum yield, and improved their optical properties. The proper ratio of capping agent allowed Zn, Ag, and In to form a better crystallinity and compositional homogeneity of Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals. The photoluminescence was tunable from blue to red in the range of 450−700 nm as the Ag content changed independently. The PL and absorption spectra of Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals showed a significant blue shift with the decrease of Ag content in the precursor. As there were no obvious differences on the average particle sizes of Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> samples, these results fully revealed the composition-dependent photoluminescence properties of Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals. The relative quantum yield reached 35%. The fluorescence lifetimes (τ<sub>1</sub>=115−148 ns and τ<sub>2</sub>=455−483 ns) were analogous to those of AgInS<sub>2</sub> and (AgIn)<sub>x</sub>Zn<sub>2(1−x)</sub>S<sub>2</sub>. |
| first_indexed | 2024-12-13T07:08:28Z |
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| issn | 2072-666X |
| language | English |
| last_indexed | 2024-12-13T07:08:28Z |
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| spelling | doaj.art-fb0a4538d68e411fab74e07cdfe08c542022-12-21T23:55:46ZengMDPI AGMicromachines2072-666X2019-07-0110743910.3390/mi10070439mi10070439The Composition-Dependent Photoluminescence Properties of Non-Stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> NanocrystalsJian Feng0Xiaosheng Yang1Rong Li2Xianjiong Yang3Guangwei Feng4State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, Guizhou, ChinaState Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, Guizhou, ChinaDepartment of Chemistry, School of Basic Medical Science, Guizhou Medical University, 9 Beijing Road, Guiyang 550004, Guizhou, ChinaDepartment of Chemistry, School of Basic Medical Science, Guizhou Medical University, 9 Beijing Road, Guiyang 550004, Guizhou, ChinaDepartment of Chemistry, School of Basic Medical Science, Guizhou Medical University, 9 Beijing Road, Guiyang 550004, Guizhou, ChinaA facile hot injection approach to synthesize high-quality non-stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals (NCs) in the size range of 2.8−3.1 nm was presented. The fluorescence spectra had single band gap features, and indicated the formation of alloy states rather than simple composite structures. The chemical compositions, photoluminescence (PL) emission wavelengths, and quantum yields of Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals were significantly influenced by the concentration of an organic capping agent. The appropriate proportion of 1-dodecanthiol in the precursor prevented the precipitation, increased the fluorescence quantum yield, and improved their optical properties. The proper ratio of capping agent allowed Zn, Ag, and In to form a better crystallinity and compositional homogeneity of Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals. The photoluminescence was tunable from blue to red in the range of 450−700 nm as the Ag content changed independently. The PL and absorption spectra of Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals showed a significant blue shift with the decrease of Ag content in the precursor. As there were no obvious differences on the average particle sizes of Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> samples, these results fully revealed the composition-dependent photoluminescence properties of Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals. The relative quantum yield reached 35%. The fluorescence lifetimes (τ<sub>1</sub>=115−148 ns and τ<sub>2</sub>=455−483 ns) were analogous to those of AgInS<sub>2</sub> and (AgIn)<sub>x</sub>Zn<sub>2(1−x)</sub>S<sub>2</sub>.https://www.mdpi.com/2072-666X/10/7/439nanoparticlesluminescencenon-stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystalsphotoluminescence propertiestunable fluorescence emissionone-pot approach |
| spellingShingle | Jian Feng Xiaosheng Yang Rong Li Xianjiong Yang Guangwei Feng The Composition-Dependent Photoluminescence Properties of Non-Stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> Nanocrystals Micromachines nanoparticles luminescence non-stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals photoluminescence properties tunable fluorescence emission one-pot approach |
| title | The Composition-Dependent Photoluminescence Properties of Non-Stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> Nanocrystals |
| title_full | The Composition-Dependent Photoluminescence Properties of Non-Stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> Nanocrystals |
| title_fullStr | The Composition-Dependent Photoluminescence Properties of Non-Stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> Nanocrystals |
| title_full_unstemmed | The Composition-Dependent Photoluminescence Properties of Non-Stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> Nanocrystals |
| title_short | The Composition-Dependent Photoluminescence Properties of Non-Stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> Nanocrystals |
| title_sort | composition dependent photoluminescence properties of non stoichiometric zn sub x sub ag sub y sub ins sub 1 5 x 0 5y sub nanocrystals |
| topic | nanoparticles luminescence non-stoichiometric Zn<sub>x</sub>Ag<sub>y</sub>InS<sub>1.5+x+0.5y</sub> nanocrystals photoluminescence properties tunable fluorescence emission one-pot approach |
| url | https://www.mdpi.com/2072-666X/10/7/439 |
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