Insoluble CdSe/ZnS QDs

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Product Structure: CdSe/ZnCdSeS/ZnS with a silica-coated surface.

Product Applications: Display technologies, light-emitting devices, optical coatings, bioimaging, sensing, etc.

Product Description

Insoluble CdSe/ZnS quantum dots (QDs) are specially engineered semiconductor nanocrystals designed for applications that require stable, solid-state quantum dots with reliable optical performance. These quantum dots exhibit excellent luminescent properties and high structural stability, making them suitable for research and advanced material development. Due to their insoluble nature, they can be conveniently integrated into solid matrices, coatings, or composite materials without dissolution or migration, enabling stable optical performance in various solid-state systems.

Structural Characteristics

The product structure of Insoluble CdSe/ZnS QDs consists of a CdSe core, a ZnCdSeS intermediate shell, and a ZnS outer shell, with an additional silica-coated surface. The CdSe core acts as the primary light-emitting center, producing strong and stable fluorescence under excitation. Meanwhile, the ZnCdSeS intermediate layer reduces lattice mismatch between the core and the outer shell, thereby improving structural integrity and optical performance. The ZnS shell further passivates surface defects, suppresses non-radiative recombination, and enhances chemical stability. The silica coating provides additional protection, improves environmental stability, and contributes to the insoluble characteristics of the quantum dots.

Key Characteristics

Insoluble CdSe/ZnS QDs exhibit high photoluminescence efficiency, enabling strong and bright emission under excitation. They also feature a narrow full width at half maximum (FWHM), which allows for sharp and well-defined emission spectra. In addition, these quantum dots demonstrate excellent stability, maintaining consistent optical performance over extended periods and under various environmental conditions such as light exposure, temperature variation, and chemical influences. The materials are also designed with low cadmium content, helping reduce potential toxicity while preserving their high optical performance.

Product Parameters

Catalog Number	Emission Peak Wavelength	FWHM	Quantum Yield	Absorption Peak Wavelength	Solubility
NM-QD0279	460±10 nm	≤25 nm	≥80%	450±10 nm	Insoluble, powder form
NM-QD0280	480±10 nm	≤25 nm	≥80%	470±10 nm	Insoluble, powder form
NM-QD0281	500±10 nm	≤25 nm	≥80%	490±10 nm	Insoluble, powder form
NM-QD0282	520±10 nm	≤26 nm	≥90%	510±10 nm	Insoluble, powder form
NM-QD0283	540±10 nm	≤26 nm	≥90%	530±10 nm	Insoluble, powder form
NM-QD0284	560±10 nm	≤28 nm	≥80%	550±10 nm	Insoluble, powder form
NM-QD0285	580±10 nm	≤28 nm	≥80%	570±10 nm	Insoluble, powder form
NM-QD0286	600±10 nm	≤28 nm	≥90%	590±10 nm	Insoluble, powder form
NM-QD0287	620±10 nm	≤28 nm	≥90%	610±10 nm	Insoluble, powder form
NM-QD0288	640±10 nm	≤28 nm	≥80%	630±10 nm	Insoluble, powder form
NM-QD0289	660±10 nm	≤28 nm	≥80%	650±10 nm	Insoluble, powder form

*If you can't find the needed QDs in the table, please send us an inquiry.

Our QDs are carefully engineered to deliver reliable optical performance, excellent photostability, and consistent batch-to-batch quality. In addition, we provide professional technical support to help researchers efficiently integrate these nanomaterials into their experimental systems and optimize their use in different materials or device platforms. If you are looking for high-performance insoluble QDs for your research or product development, Alfa Chemistry is a trusted partner ready to support your work with high-quality products and responsive service.

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※ Please kindly note that our products and services are for research use only.

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