One-Pot Synthesis and Characterization of CuCrS<sub>2</sub>/ZnS Core/Shell Quantum Dots as New Blue-Emitting Sources
In this paper, we introduce a new blue-emitting material, CuCrS<sub>2</sub>/ZnS QDs (CCS QDs). To obtain bright and stable photoluminescent probes, we prepared a core/shell structure; the synthesis was conducted in a one-pot system, using 1-dodecanethiol as a sulfur source and co-ligand....
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| Online Access: | https://www.mdpi.com/1996-1944/16/2/762 |
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| author | Ho-Kyung Lee Ye-Jun Ban Hyun-Jong Lee Ji-Hyeon Kim Sang-Joon Park |
| author_facet | Ho-Kyung Lee Ye-Jun Ban Hyun-Jong Lee Ji-Hyeon Kim Sang-Joon Park |
| author_sort | Ho-Kyung Lee |
| collection | DOAJ |
| description | In this paper, we introduce a new blue-emitting material, CuCrS<sub>2</sub>/ZnS QDs (CCS QDs). To obtain bright and stable photoluminescent probes, we prepared a core/shell structure; the synthesis was conducted in a one-pot system, using 1-dodecanethiol as a sulfur source and co-ligand. The CCS QDs exhibited a semi-spherical colloidal nanocrystalline shape with an average diameter of 9.0 nm and ZnS shell thickness of 1.6 nm. A maximum photoluminescence emission peak (PL max) was observed at 465 nm with an excitation wavelength of 400 nm and PLQY was 5% at an initial [Cr<sup>3+</sup>]/[Cu<sup>+</sup>] molar ratio of one in the core synthesis. With an off-stoichiometric modification for band gap engineering, the CCS QDs exhibited slightly blue-shifted PL emission spectra and PLQY was 10% with an increase in initial molar ratio of 2.0 (462 nm PL max). However, when the initial molar ratio exceeded two, the CCS QDs exhibited a lower photoluminescence quantum yield of 4.5% with 461 nm of PL max at the initial molar ratio of four due to the formation of non-emissive Cr<sub>2</sub>S<sub>3</sub> nanoflakes. |
| first_indexed | 2024-03-09T11:48:15Z |
| format | Article |
| id | doaj.art-32088102f59542e7919d6150d27a7f9c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T11:48:15Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-32088102f59542e7919d6150d27a7f9c2023-11-30T23:17:49ZengMDPI AGMaterials1996-19442023-01-0116276210.3390/ma16020762One-Pot Synthesis and Characterization of CuCrS<sub>2</sub>/ZnS Core/Shell Quantum Dots as New Blue-Emitting SourcesHo-Kyung Lee0Ye-Jun Ban1Hyun-Jong Lee2Ji-Hyeon Kim3Sang-Joon Park4Department of Chemical and Biological Engineering, Gachon University, 1342, Seongnam Street, Seongnam City 13120, Republic of KoreaDepartment of Chemical and Biological Engineering, Gachon University, 1342, Seongnam Street, Seongnam City 13120, Republic of KoreaDepartment of Chemical and Biological Engineering, Gachon University, 1342, Seongnam Street, Seongnam City 13120, Republic of KoreaDepartment of Chemical and Biological Engineering, Gachon University, 1342, Seongnam Street, Seongnam City 13120, Republic of KoreaDepartment of Chemical and Biological Engineering, Gachon University, 1342, Seongnam Street, Seongnam City 13120, Republic of KoreaIn this paper, we introduce a new blue-emitting material, CuCrS<sub>2</sub>/ZnS QDs (CCS QDs). To obtain bright and stable photoluminescent probes, we prepared a core/shell structure; the synthesis was conducted in a one-pot system, using 1-dodecanethiol as a sulfur source and co-ligand. The CCS QDs exhibited a semi-spherical colloidal nanocrystalline shape with an average diameter of 9.0 nm and ZnS shell thickness of 1.6 nm. A maximum photoluminescence emission peak (PL max) was observed at 465 nm with an excitation wavelength of 400 nm and PLQY was 5% at an initial [Cr<sup>3+</sup>]/[Cu<sup>+</sup>] molar ratio of one in the core synthesis. With an off-stoichiometric modification for band gap engineering, the CCS QDs exhibited slightly blue-shifted PL emission spectra and PLQY was 10% with an increase in initial molar ratio of 2.0 (462 nm PL max). However, when the initial molar ratio exceeded two, the CCS QDs exhibited a lower photoluminescence quantum yield of 4.5% with 461 nm of PL max at the initial molar ratio of four due to the formation of non-emissive Cr<sub>2</sub>S<sub>3</sub> nanoflakes.https://www.mdpi.com/1996-1944/16/2/762CuCrS<sub>2</sub>quantum dotsphotoluminescenceblue emission |
| spellingShingle | Ho-Kyung Lee Ye-Jun Ban Hyun-Jong Lee Ji-Hyeon Kim Sang-Joon Park One-Pot Synthesis and Characterization of CuCrS<sub>2</sub>/ZnS Core/Shell Quantum Dots as New Blue-Emitting Sources Materials CuCrS<sub>2</sub> quantum dots photoluminescence blue emission |
| title | One-Pot Synthesis and Characterization of CuCrS<sub>2</sub>/ZnS Core/Shell Quantum Dots as New Blue-Emitting Sources |
| title_full | One-Pot Synthesis and Characterization of CuCrS<sub>2</sub>/ZnS Core/Shell Quantum Dots as New Blue-Emitting Sources |
| title_fullStr | One-Pot Synthesis and Characterization of CuCrS<sub>2</sub>/ZnS Core/Shell Quantum Dots as New Blue-Emitting Sources |
| title_full_unstemmed | One-Pot Synthesis and Characterization of CuCrS<sub>2</sub>/ZnS Core/Shell Quantum Dots as New Blue-Emitting Sources |
| title_short | One-Pot Synthesis and Characterization of CuCrS<sub>2</sub>/ZnS Core/Shell Quantum Dots as New Blue-Emitting Sources |
| title_sort | one pot synthesis and characterization of cucrs sub 2 sub zns core shell quantum dots as new blue emitting sources |
| topic | CuCrS<sub>2</sub> quantum dots photoluminescence blue emission |
| url | https://www.mdpi.com/1996-1944/16/2/762 |
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