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

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Melting Point Not defined (decomposes before melting)
Molecular Weight ZnSe: 144.35 g/mol; ZnS: 97.46 g/mol
Shape Spherical
Solubility Dispersible in polar and non-polar solvents (ethanol, toluene, chloroform, water with special surface modification)
Molecular Formula ZnSe/ZnS
Refractive Rate 2.67 (ZnSe), 2.37 (ZnS)
Taste Odorless and tasteless
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LED Quantum Dots (Zinc Selenide /Zinc Sulphide Quantum Dots) Product Specifications

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

Dispersibility Compatible with organic and aqueous media depending on ligand choice
Customization Surface functionalization available for specific applications
Optical Stability Maintains emission >12 months under dark, dry storage
Emission Wavelength 400620 nm (size-dependent, covering visible spectrum)
Stability High photostability and chemical resistance in ambient conditions
Quantum Yield >70% (varies with surface passivation)
Surface Chemistry Carboxyl, amine, or custom organic ligand capped
Shell Thickness Typically 13 monolayers of ZnS shell over ZnSe core
Excitation Source UV to visible light
Toxicity Level Low, environmentally friendly compared to Cd-based QDs
Photoluminescence Lifetime 1040 ns
Shelf Life >24 months in sealed storage
Particle Size 210 nm (tunable)
Lattice Structure Cubic (Zinc Blende)

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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