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

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Ph Level Neutral (when in aqueous solution, pH 6.5 7.5)
Molecular Weight ZnSe: 144.35 g/mol; ZnS: 97.46 g/mol
Form Colloidal dispersion or powder
Shape Spherical
Storage Store in a cool, dry place away from light, in airtight containers
Taste Odorless and tasteless
Other Names ZnSe/ZnS QDs; Quantum Nanocrystals
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LED Quantum Dots (Zinc Selenide /Zinc Sulphide Quantum Dots) Product Specifications

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

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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