InP/ZnS quantum dots stabilized with oleylamine ligands, fluorescence λem 530 nm, 5 mg/mL in toluene
InP/ZnS core shell nanocrystals are Cadmium free/heavy metal free quantum dots suitable for different applications like light emitting diodes (LEDs; display; biomedical applications. The toxicity of Cd compounds and the corresponding regulations worldwide makes these InP/ZnS quantum dots as more desirable alternatives for consumer applications…
| InP/ZnS quantum dots | |
| Product No. | NRE-55001 |
| Concentration | 5mg/ml |
| Purity | 99.9% |
| Formula | InP/ZnS |
| Florescence | Λem 530nm |
| APS | <10nm |
| Solvent | Toluene |
| Quantum Yield | 40-80% |
| FWHM | <30nm |
| Form | Liquid |
InP/ZnS quantum dots
Introduction
InP/ZnS quantum dots are nanometer-sized semiconductor particles made from Indium Phosphide (InP) as the core material, with a Zinc Sulfide (ZnS) shell. These quantum dots (QDs) are a member of the family of core-shell quantum dots, where the core is typically made from a semiconductor material, and the shell is an additional layer that improves the performance and stability of the core.
Indium Phosphide (InP): InP is a III-V semiconductor material that offers favorable optical properties, such as a tunable band gap and high photoluminescence efficiency. InP-based quantum dots have been favored as a safer alternative to traditional cadmium-based quantum dots (e.g., CdSe), which are toxic and pose environmental and health risks.
Zinc Sulfide (ZnS): ZnS is a II-VI semiconductor that serves as a protective shell around the InP core. The ZnS shell enhances the photoluminescent properties of InP by reducing surface defects and preventing non-radiative recombination. It also improves the chemical stability and resistance of the quantum dots to oxidation and environmental degradation.
Properties
Size-Tunable Optical Properties:
Like all quantum dots, InP/ZnS quantum dots exhibit a size-dependent bandgap, meaning that their absorption and emission spectra can be tuned by adjusting the size of the quantum dots. By controlling the size, the emission wavelength can be varied from the visible to near-infrared (NIR) regions.
Tunable Emission: The emission wavelengths can be tailored from around 400 nm (violet) to 700 nm (red) in the visible range, with some dots even emitting in the near-infrared (NIR), making them ideal for various optical applications.
High Photoluminescence Efficiency:
The ZnS shell significantly improves the quantum yield of the InP core, resulting in high photoluminescence efficiency. This makes InP/ZnS quantum dots suitable for applications that rely on bright fluorescence, such as bioimaging.
