Zinc Selenide/Zinc Sulfide Quantum Dots(ZnSe/ZnS QDs), Zinc Selenide Quantum Dots (ZnSe/ZnS QD)

Product Information

Zinc Selenide Quantum Dots are semiconductor particles with diameter less than 30 nm. Zinc Selenide Quantum Dots have unique optical and electrical properties. ZnSe QDs have a wide band gap. They are suitable for doping processes. Our products concentration is 25mg/mL, 50mg/mL, 100mg/mL. ATT is a manufacturer and supplier specializing in producing Zinc Selenide/Zinc Sulfide (ZnSe/ZnS) Quantum Dots. ATT manufactures quantum dots from several semiconductor materials, including Cadmium Telluride (CdTe), Lead Selenide (PbSe), Zinc Indium Phosphide/Zinc Sulfide (ZnInP/ZnS), Indium Phosphide/ Zinc Sulfide (InP/ZnS), and Graphene; Emission 410 nm, 415 nm, 420 nm, 430 nm,440nm,450nm

Traditional quantum dots usually contain Cd elements, such as CdSe and CdTe quantum dots. These quantum dots show high luminous efficiency, but their application is limited due to their biological toxicity. In order to reduce the toxicity, many Cd-free quantum dots have been developed, among which ZnSe/ZnS quantum dots are an important type. ZnSe/ZnS quantum dots are core-shell type fluorescent quantum dots. In the structure of ZnSe/ZnS quantum dots, ZnSe is the core material and ZnS is the shell material. ZnS shell structure has lattice constant that can match with ZnSe core material, but the band gap is wider. As the shell, ZnS can effectively eliminate a large number of defects on the surface of ZnSe, and improve the luminescence performances. Due to the non-toxic and harmless properties of Zn element, ZnSe/ZnS quantum dots are a kind of green and environment-friendly quantum dots, and have attracted more and more attention in recent years.

Synonyms

ZnSe/ZnS quantum dots, Zinc Selenide/Zinc Sulphide QDs, zinc selenide zinc sulfide alloyed quantum dots, Bioconjugation Quantum Dots (ZnSe/ZnS-PEG-COOH Qds 410nm), Alloyed Quantum Dots, ZnSe/ZnS-MPA Quantum Dots 410nm, ZnSe/ZnS-PEG-NH2, Water soluble ZnSe/ZnS-PEG-COOH 430nm, ZnSe ZnS MPA-COOH

ZnSe/ZnS QDs Specification

Size：customized, 410 nm, 415 nm, 420 nm, 430 nm,440nm,450nm

Per your request or drawing

We can customized as required

Features

Emission: 400 nm - 450 nm

Quantum Yield: ≥ 40%

Uniform size distribution

High quantum yield

Low toxicity

Classification:

According to the solubility, ZnSe/ZnS quantum dots can be divided into water-soluble ZnSe/ZnS quantum dots and non-water-soluble ZnSe/ZnS quantum dots.

Water-soluble ZnSe/ZnS quantum dots: Water-soluble ZnSe/ZnS quantum dots  can be well dispersed in aqueous phase solution and are suitable for the      applications in aqueous phase environment, especially in the biological  field.

Non-water-soluble ZnSe/ZnS quantum dots: After  modified by hydrophobic ligands, non-water-soluble ZnSe/ZnS quantum dots  can be obtained, and the fluorescence emission wavelength can be  customized according to requirements.

ATT  provides different kinds of ZnSe/ZnS Quantum Dots including,

MPA-COOH   ZnSe/ZnS QDs are 3-Mercaptopropionic acid (MPA) functionalized ZnSe/ZnS core/shell quantum dot, with the emission peaks of 410 nm to 430 nm, quantum yield > 75%.

PEG-NH2 ZnSe/ZnS QDs are Amino PEG functionalized ZnSe/ZnS core/shell quantum  dots, with the emission peaks of 410 nm to 430 nm, quantum yield > 75%.

PEG-COOH ZnSe/ZnS QDs are Carboxyl PEG functionalized ZnSe/ZnS core/shell quantum dots, with the emission peaks of 410 nm and 430 nm, quantum yield > 75%.

GSH ZnSe/ZnS QDs are Glutathione (GSH) ZnSe/ZnS core/shell quantum dots, with the emission peaks of 410 nm to 430 nm, quantum yield > 75%.

Octadecylamine ZnSe/ZnS QDs are ZnSe/ZnS core/shell quantum dots coated with octadecylamine (ODA), with the emission peaks ranging from 400 nm to 440 nm, quantum yield ~40%.

Properties（Theoretical）

Applications of ZnSe/ZnS QDs

Solar cell field: Solar cells can convert light energy  into electricity, which is an important direction of new energy  development, and silicon-based solar cells are a kind of important solar  cells. In short wave spectral region, silicon-based solar cells have low responsibility and the band reflectance is relatively high. Therefore,   silicon-based solar cells have low quantum efficiency in shortwave region. In order to solve this problem, luminescent down-shifting layers can be  used to transform the short-wave regional spectrum into the band that  solar cells have strong spectral response. ZnSe/ZnS quantum dots can be      used as the luminescent material of the down-shifting layers to improve  the quantum efficiency of solar cells.

Biomarker fields: ZnSe/ZnS quantum dots is  a new kind of inorganic fluorescent biomarkers with high luminous  efficiency. Compared with organic fluorescent dyes, ZnSe/ZnS quantum dots  have many obvious advantages. On the one hand, ZnSe/ZnS quantum dots have  a narrow emission spectrum, which can be adjusted in the ultraviolet,  visible and infrared regions, according to requirements. Moreover,  ZnSe/ZnS quantum dots have wide excitation bands, so different wavelengths  can be obtained by using a single excitation wavelength. On the other  hand, ZnSe/ZnS quantum dots show good photostability, anti-photobleaching, and excellent sensitivity.

The others: ZnSe/ZnS quantum dots can  also be used in LED field, tumor therapy field, analysis and testing field and the others. As a new kind of luminescent material, ZnSe/ZnS quantum   dots have been used as a luminescent layer in the manufacture of  light-emitting diodes (LEDs). Due to the special size effect, the LEDs  based on ZnSe/ZnS quantum dots have advantages such as high luminous  efficiency, high color rendering index, long service life, low cost and  simple processing technology, which has a very broad development prospect.

Packing of ZnSe/ZnS QDs

Standard Packing:

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes Special package is available on request.

ATTs’ ZnSe/ZnS QDs is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.

Chemical Identifiers