Facile synthesis of nano-sized zinc-rich ZnCdS ternary alloy and UV-irradiation curing of photoluminescence emission characteristics
Source abstract
Abstract
Abstract Zn-rich ZnCdS nanoparticles (NPs) are successfully synthesized by a facile chemical co-precipitation technique at room temperature. The crystal structure homogeneity of the as-synthesized ternary alloy is examined by the x-ray diffraction pattern and the micro-Raman spectroscopy. The average crystalline domain size is about 4 nm indicating the spatial particle confinement of ternary ZnCdS NPs. The optical bandgap (Eg) of the as-synthesized ZnCdS NPs is 3.95 eV that is higher than the corresponding ternary bulk alloy due to the improvement in the quantum size effect. The effect of UV irradiation on the optical band gap of ZnCdS NPs is investigated at different exposure times. A strong decrease in Eg is observed with increasing exposure time up to 60 min followed by Eg saturation at higher UV exposure times. The as-synthesized ZnCdS nanopowder exhibits a wide emission spectrum extending from UV to visible spectral region, which originating from various intrinsic structural defects. The aging of the as-synthesized ZnCdS nanopowder results in emission intensity quenching without changing peak positions. The emission intensity is recovered by the direct exposure to UV irradiation. This indicates the ability of UV irradiation to cure the emission characteristics of small NPs. This would provide more durability about the emission characteristics of the ZnCdS NPs-based fluorescence sensor.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. Investigations on chemically capped CdS, ZnS and ZnCdS nanoparticles10.1016/S0169-4332(00)00700-5 ↗
2. Controlled photoinduced electron transfer from InP/ZnS quantum dots through Cu doping: a new prototype for the visible-light photocatalytic hydrogen evolution reaction10.1021/acs.nanolett.0c00983 ↗
3. Luminescent, magnetic and optical properties of ZnO-ZnS nanocomposites10.1016/j.physb.2016.11.031 ↗
4. Atomically dispersed Co-P3 on CdS nanorods with electron-rich feature boosts photocatalysis10.1002/adma.201904249 ↗
5. Evolution of metastable defects and its effect on the electronic properties of MoS 2 films10.1038/s41598-018-24913-y ↗
6. White light-emitting devices based on ZnCdS/ZnS and perovskite nanocrystal heterojunction10.1088/1361-6528/ab39b2 ↗
7. High-efficiency, deep blue ZnCdS/Cd x Zn 1− x S/ZnS quantum-dot-light-emitting devices with an EQE exceeding 18%10.1039/C7NR09175C ↗
8. Facile preparation and characterization of ZnCdS nanocrystals for interfacial applications in photovoltaic devices10.1016/j.jcis.2017.09.108 ↗
9. Photovoltaic properties of ZnCdS/CdTe heterojunctions prepared by spray pyrolysis10.1063/1.325025 ↗
10. Selective sensing of Mn2+ based on ZnCdS/ZnS QD/carboxymethyl chitosan/g-C3N4 nanosheet nanocomposite film by the conformational regulation of polymer chain10.1016/j.apsusc.2020.147255 ↗
11. A novel ascorbic acid ratiometric fluorescent sensor based on ZnCdS quantum dots embedded molecularly imprinted polymer and silica-coated CdTeS quantum dots10.1016/j.molliq.2021.116438 ↗
12. Fluorescent Mn: ZnCdS@ ZnS and CdTe quantum dots probes on SiO2 microspheres for versatile detection of carcinoembryonic antigen and monitoring T4 polynucleotide kinase activity10.1021/acsanm.9b01003 ↗
13. Identification of trapping and recombination levels, structure, morphology, photoluminescence and optical absorption behavior of alloyed ZnxCd1-xS quantum dots10.1016/j.jallcom.2017.06.104 ↗
14. Photoluminescence depending on the ZnS shell thickness of CdS/ZnS core-shell semiconductor nanoparticles10.1016/j.colsurfa.2004.06.016 ↗
15. Probing nano-heterogeneity and aging effects in lateral 2D heterostructures using tip-enhanced photoluminescence10.1364/OME.9.001620 ↗
16. Aging effect and origin of deep-level emission in ZnO thin film deposited by pulsed laser deposition10.1063/1.1939078 ↗
17. Preparation and characterization of ZnS–polymer nanocomposite films with high refractive index10.1039/B304154A ↗
18. Studies on the effect of UV irradiation on Mn-doped ZnS nanoparticles10.1016/j.msec.2005.06.022 ↗
19. High power UV-light irradiation as a new method for defect passivation in degraded perovskite solar cells to recover and enhance the performance
20. Size-dependent structural phase transitions and their correlation with photoluminescence and optical absorption behavior of annealed Zn0.45Cd0.55S quantum dots10.1016/j.matchar.2018.07.020 ↗
21. Influence of thermally induced structural and morphological changes, and UV irradiation on photoluminescence and optical absorption behavior of CdS nanoparticles10.1088/0022-3727/49/16/165302 ↗
22. Thermal annealing and UV irradiation effects on structure, morphology, photoluminescence and optical absorption spectra of EDTA-capped ZnS nanoparticles10.1088/0022-3727/49/5/055304 ↗
23. Mechanism of formation of composite cds-zns Ultrafine particles in reverse micelles10.1021/ie00046a034 ↗
24. Composition-dependent optical properties of ZnxCd1−xS synthesized by precipitable-hydrothermal process10.1016/j.ssc.2008.02.016 ↗
25. Raman spectrum of cubic ZnS10.1103/PhysRev.182.838 ↗
26. Visible emission characteristics from different defects of ZnS nanocrystals10.1039/c0cp01620a ↗
27. Structural and optical characterization of wurtzite type ZnS10.1016/j.cap.2014.11.012 ↗
28. Compositional dependence of the Raman frequencies and line shapes of ZnS 1− x Te x alloys10.1063/1.1691183 ↗
29. Gaponenko · 1998
30. Excitation wavelength dependent photoluminescence emission behavior, UV induced photoluminescence enhancement and optical gap tuning of Zn0.45Cd0.55S nanoparticles for optoelectronic applications10.1016/j.optmat.2018.01.011 ↗
31. Size-dependent composition and molar extinction coefficient of PbSe semiconductor nanocrystals10.1021/nn9001616 ↗
32. States in the gap10.1016/0022-3093(72)90194-9 ↗
33. Sonochemically synthesized Ni-doped ZnS nanoparticles: structural, optical, and photocatalytic properties10.1007/s10854-019-02693-z ↗
34. Influence of doping with Sb3+, In3+, and Bi3+ ions on the structural, optical and dielectric properties of ZnS nanoparticles synthesized by ultrasonication process10.1016/j.physb.2021.413041 ↗
35. Influence of transition metals dopant type on the structural, optical, magnetic, and dielectric properties of ZnS nanoparticles prepared by ultrasonication process
36. Luminescence of Mn2+ doped ZnS nanocrystallites10.1016/0022-2313(95)00160-3 ↗