Phosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes
Blue-light-emitting ZnSe core (C) and ZnSe/ZnS core/shell (C/S) quantum dots (QDs) were synthesized with phosphine-free precursors by a thermal decomposition method in paraffin oil solvent and applied to QD-converted light-emitting diodes (LEDs). The optical properties of the synthesized ZnSe C and...
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2021
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oai:doaj.org-article:61e8ea382d5a4092bc62b117a7eb7d5e2021-11-11T15:07:51ZPhosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes10.3390/app1121100602076-3417https://doaj.org/article/61e8ea382d5a4092bc62b117a7eb7d5e2021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10060https://doaj.org/toc/2076-3417Blue-light-emitting ZnSe core (C) and ZnSe/ZnS core/shell (C/S) quantum dots (QDs) were synthesized with phosphine-free precursors by a thermal decomposition method in paraffin oil solvent and applied to QD-converted light-emitting diodes (LEDs). The optical properties of the synthesized ZnSe C and ZnSe/ZnS C/S QDs were characterized by absorption spectroscopy and photoluminescence spectroscopy. Additionally, the quantum efficiency of the QDs was investigated. Their structural properties were studied with X-ray crystallography and transmission electron microscopy. The ZnSe/ZnS C/S QDs showed deep-blue light peaking at 425 nm. The blue-light-emitting ZnSe/ZnS C/S QDs were used as color-converting materials for near-ultraviolet LED-pumped blue LEDs and combined with yellow-light-emitting Zn-Cu-In-S/ZnS C/S QDs to fabricate white LEDs. The white LEDs showed warm white light [(CIE x, CIE y) = (0.4088, 0.3987)], <i>T</i><sub>c</sub> = 3488 K, and R<sub>a</sub> = 61.2]. The results indicate that the ZnSe/ZnS C/S QDs have good potential for white light application after further improvements to their optical properties.Nyamsuren ByambasurenJiyeon JoHyungduk KoByeong-Kwon JuJi Young ByunHo Seong JangMDPI AGarticleZnSe/ZnS quantum dotscore/shell structureblue LEDwarm white LEDTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10060, p 10060 (2021) |
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| topic |
ZnSe/ZnS quantum dots core/shell structure blue LED warm white LED Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 |
| spellingShingle |
ZnSe/ZnS quantum dots core/shell structure blue LED warm white LED Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Nyamsuren Byambasuren Jiyeon Jo Hyungduk Ko Byeong-Kwon Ju Ji Young Byun Ho Seong Jang Phosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes |
| description |
Blue-light-emitting ZnSe core (C) and ZnSe/ZnS core/shell (C/S) quantum dots (QDs) were synthesized with phosphine-free precursors by a thermal decomposition method in paraffin oil solvent and applied to QD-converted light-emitting diodes (LEDs). The optical properties of the synthesized ZnSe C and ZnSe/ZnS C/S QDs were characterized by absorption spectroscopy and photoluminescence spectroscopy. Additionally, the quantum efficiency of the QDs was investigated. Their structural properties were studied with X-ray crystallography and transmission electron microscopy. The ZnSe/ZnS C/S QDs showed deep-blue light peaking at 425 nm. The blue-light-emitting ZnSe/ZnS C/S QDs were used as color-converting materials for near-ultraviolet LED-pumped blue LEDs and combined with yellow-light-emitting Zn-Cu-In-S/ZnS C/S QDs to fabricate white LEDs. The white LEDs showed warm white light [(CIE x, CIE y) = (0.4088, 0.3987)], <i>T</i><sub>c</sub> = 3488 K, and R<sub>a</sub> = 61.2]. The results indicate that the ZnSe/ZnS C/S QDs have good potential for white light application after further improvements to their optical properties. |
| format |
article |
| author |
Nyamsuren Byambasuren Jiyeon Jo Hyungduk Ko Byeong-Kwon Ju Ji Young Byun Ho Seong Jang |
| author_facet |
Nyamsuren Byambasuren Jiyeon Jo Hyungduk Ko Byeong-Kwon Ju Ji Young Byun Ho Seong Jang |
| author_sort |
Nyamsuren Byambasuren |
| title |
Phosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes |
| title_short |
Phosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes |
| title_full |
Phosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes |
| title_fullStr |
Phosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes |
| title_full_unstemmed |
Phosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes |
| title_sort |
phosphine-free-synthesized znse/zns core/shell quantum dots for white light-emitting diodes |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/61e8ea382d5a4092bc62b117a7eb7d5e |
| work_keys_str_mv |
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| _version_ |
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