CdS/ZnS core-shell type quantum dots oleic acid functionalized, fluorescence λem 425 nm, 5 mg/mL in toluene
Highly purified CdS/ZnS quantum dots with oleic acid surface ligand contain extremely low free organic ligands and impurities. They are well suited for display, solid state lighting, and solar cell applications. They can be used as electroluminescence emitter in quantum dots based LEDs or embedded in polymer matrix as the backlight of LCD display. CdSe/ZnS quantum dots in solid form can be dispersed in most non-polar organic solvents such as toluene, chloroform, and hexane
| CdS/ZnS core-shell type quantum dots | |
| Product No. | NRE-21004 |
| Concentration | 5mg/ml |
| Purity | 99.9% |
| Formula | CdS/ZnS |
| Florescence | Λem 425nm |
| APS | <10nm |
| Solvent | Toluene |
| Quantum Yield | 40-80% |
| FWHM | <30nm |
| Form | Liquid |
CdS/ZnS core-shell type quantum dots
Introduction:
CdS/ZnS core-shell type quantum dots are a type of semiconductor nanomaterial that combines cadmium sulfide (CdS) as the core and zinc sulfide (ZnS) as the shell. These quantum dots belong to a broader family of core-shell nanomaterials designed to enhance the properties of the core material (CdS in this case) while overcoming some of its limitations. The core-shell architecture plays a pivotal role in improving optical, chemical, and environmental properties of the quantum dots, making them highly attractive for a wide range of applications.
What Are Quantum Dots?
Quantum dots (QDs) are nanoscale semiconductor particles that exhibit unique electronic and optical properties due to the quantum confinement effect. This effect arises when the size of the quantum dot is reduced to a scale that is smaller than the exciton Bohr radius, leading to discrete energy levels. Quantum dots can absorb and emit light in a highly size-dependent manner, making them extremely versatile in applications that require tunable optical properties.
Key Features of CdS/ZnS Core-Shell Quantum Dots
High Photoluminescence: The ZnS shell enhances the photoluminescence (PL) efficiency of the CdS core, leading to brighter emission and higher quantum yield.
Size-Tunable Emission: The emission wavelength of CdS/ZnS quantum dots can be tuned by controlling their size, which is ideal for applications like biological imaging, displays, and lighting.
Improved Stability: The ZnS shell improves the chemical stability of CdS quantum dots, reducing their susceptibility to degradation due to exposure to air, light, or moisture.
Reduced Toxicity: The ZnS shell encapsulates the toxic cadmium core, reducing the potential for cadmium ion leakage and making the quantum dots safer for use in biological and environmental contexts.
