LED Quantum Dots (Zinc Selenide /Zinc Sulphide Quantum Dots)

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Density 5.27 Gram per cubic centimeter(g/cm3)
Form Colloidal dispersion or powder
Structural Formula ZnSe (core) / ZnS (shell)
Other Names ZnSe/ZnS QDs; Quantum Nanocrystals
Solubility Dispersible in polar and non-polar solvents (ethanol, toluene, chloroform, water with special surface modification)
Melting Point Not defined (decomposes before melting)
Shape Spherical
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LED Quantum Dots (Zinc Selenide /Zinc Sulphide Quantum Dots) Product Specifications

Classification II-VI Semiconductor Quantum Dots
Smell No recognizable odor
Molecular Weight ZnSe: 144.35 g/mol; ZnS: 97.46 g/mol
Type Inorganic Semiconductor Quantum Dots
Taste Odorless and tasteless
Storage Store in a cool, dry place away from light, in airtight containers
HS Code 28429090
Molecular Formula ZnSe/ZnS
Poisonous Yes
Shape Spherical
Application LEDs, bio-imaging, solar cells, display technology, photodetectors, sensors
Boiling point Not applicable (nanomaterial, decomposes)
Refractive Rate 2.67 (ZnSe), 2.37 (ZnS)
Purity >99% (trace metal basis)
Standard Meets ASTM/EPR spectroscopic and photonic standards
Main Material Zinc Selenide / Zinc Sulphide
Ph Level Neutral (when in aqueous solution, pH 6.5 7.5)
Solubility Dispersible in polar and non-polar solvents (ethanol, toluene, chloroform, water with special surface modification)
Other Names ZnSe/ZnS QDs; Quantum Nanocrystals
Structural Formula ZnSe (core) / ZnS (shell)
Usage For optoelectronics and advanced material research
Melting Point Not defined (decomposes before melting)
Chemical Name Zinc Selenide/Zinc Sulphide Quantum Dots
EINECS No 215-257-4 (ZnSe); 215-251-3 (ZnS)
Form Colloidal dispersion or powder
Density 5.27 Gram per cubic centimeter(g/cm3)
Grade Electronic / Research Grade
CAS No 1315-09-9 (ZnSe); 1314-98-3 (ZnS)

Excitation Source UV to visible light
Toxicity Level Low, environmentally friendly compared to Cd-based QDs
Surface Chemistry Carboxyl, amine, or custom organic ligand capped
Photoluminescence Lifetime 10-40 ns
Optical Stability Maintains emission >12 months under dark, dry storage
Customization Surface functionalization available for specific applications
Lattice Structure Cubic (Zinc Blende)
Quantum Yield >70% (varies with surface passivation)
Shelf Life >24 months in sealed storage
Dispersibility Compatible with organic and aqueous media depending on ligand choice
Shell Thickness Typically 1-3 monolayers of ZnS shell over ZnSe core
Particle Size 2-10 nm (tunable)
Stability High photostability and chemical resistance in ambient conditions
Emission Wavelength 400-620 nm (size-dependent, covering visible spectrum)

LED Quantum Dots (Zinc Selenide /Zinc Sulphide Quantum Dots) Trade Information

Payment Terms Paypal, Telegraphic Transfer (T/T), Cash in Advance (CID), Cheque, Cash Advance (CA)
Main Domestic Market All India

Product Description

LED Quantum Dots (Zinc Selenide /Zinc Sulphide Quantum Dots)

Zinc Selenide /Zinc Sulphide Quantum Dots
Concentration: 1mg/mL to 20 mg/mL (in stock)
Concentration Customization: Possible
Carrier: Water, Ethanol, IPA, NMP, DMF, Toluene, Methanol
Dispersion Customization: Possible
Size: 10 mL 100 mL
Composition: Led Quantum Dots (Zinc Selenide /Zinc Sulphide Quantum Dots
Appearance: Colorless solution
PL peak: 415 nm (reference only, actual value may vary)
Particle Size: 12-18 nm
Concentration: 1 mg/ml (available up to 20mg/ml)
Solution: Toluene
Purity: >90%

High Quantum Yield and Tunable Emission

Zinc Selenide/Zinc Sulphide quantum dots deliver remarkable quantum yields (>70%) and size-dependent emission wavelengths covering the visible spectrum. This controllable photoluminescence makes them ideal for precision applications in lighting, display screens, and bio-imaging, meeting ASTM and EPR standards for spectroscopic reliability.

Advanced Surface Chemistry and Stability

With the ability to cap the surface with carboxyl, amine, or custom organic ligands, these quantum dots ensure compatibility in both organic and aqueous environments. The cubic zinc blende structure and ZnS shell thickness of 13 monolayers enhance stability, resulting in extended optical performance and ambient chemical resistance.

Environmentally Friendly and Versatile Applications

Distinguished by low toxicity, these quantum dots present a safer alternative to cadmium-based nanomaterials. Their reproducible colloidal or powder form and dispersibility in various solvents facilitate their use in LEDs, solar cells, sensors, and medical imaging, bolstering sustainability and safety in next-generation technologies.

FAQs of LED Quantum Dots (Zinc Selenide /Zinc Sulphide Quantum Dots):

Q: How do Zinc Selenide/Zinc Sulphide quantum dots achieve tunable emission across the visible spectrum?

A: The emission wavelength is determined by the quantum dot particle size, which can be precisely controlled between 210 nm during the synthesis process. Smaller particle sizes emit at shorter wavelengths (blue), while larger dots display longer wavelengths (red), enabling broad coverage from 400 to 620 nm.

Q: What advantages does the ZnSe/ZnS shell structure offer in terms of stability and performance?

A: The ZnS shell, typically 13 monolayers thick, encapsulates the ZnSe core, significantly enhancing chemical resistance and photostability. This configuration maintains strong quantum yield (>70%) and optical performance for over 12 months under appropriate storage conditions.

Q: When and where can these quantum dots be used effectively?

A: These quantum dots are suitable for use in LEDs, bio-imaging, solar cells, display technologies, photodetectors, and sensors. Their robust stability and dispersibility allow them to perform effectively in research labs, medical environments, industrial production, and innovative material development projects.

Q: What process is involved in customizing the surface chemistry of these quantum dots?

A: Customization involves functionalizing the quantum dot surface with specific ligands such as carboxyl, amine, or other organic groups. This tailoring facilitates targeted dispersibility (aqueous/organic media), bioconjugation, and optimized compatibility with application-specific environments.

Q: How does the low toxicity of ZnSe/ZnS quantum dots benefit users and the environment?

A: Compared to cadmium-based alternatives, these quantum dots present significantly lower environmental and human health risks when properly capped. This reduction in toxicity improves safety in handling and disposal, making them favorable for sensitive applications like bio-imaging and green optoelectronics.

Q: What are the recommended storage conditions and shelf life for these quantum dots?

A: Store quantum dots in airtight containers, in a cool, dry place away from direct light. Under sealed conditions, they offer a shelf life exceeding 24 months while maintaining high emission stability and chemical integrity.

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