CdTe quantum dot customization

Product Name Name: CdTe quantum dot customization Product Overview Quantum dots (QDs) are a type of inorganic semiconductor nanomaterial that has been increasingly studied in recent years. The semiconductor quantum dots that have been extensively studied are zero dimensional nanocrystalline materials based on three series: II-VI (such as CdSe, ZnS), III-V (such as GaAs, InP), and IV-VI (such as PbS, PbSe). When the diameter of semiconductor crystal particles is smaller than or equivalent to the exciton Bohr radius of the semiconductor bulk material, their electronic energy levels change from quasi continuous to discrete, and the crystal particles are in a quantum confined state. The bandgap of quantum dots changes with grain size, known as the quantum size effect. As the particle size decreases, the effective bandgap of semiconductor quantum dots increases, and their corresponding absorption and fluorescence spectra undergo a blue shift. The properties of a single semiconductor quantum dot strongly depend on its environment, and the strong surface forces and concentration gradients can easily cause ligand loss, leading to photo induced oxidation, erosion, and dissolution of nanocrystals. Therefore, surface passivation is needed to enhance its stability and improve its fluorescence quantum yield. Therefore, after producing a single quantum dot, another wide bandgap semiconductor material can be grown on the surface orientation to obtain composite quantum dots with core-shell structure, which can greatly improve the fluorescence quantum yield and photo oxidation stability. Technical Parameter Excitation wavelength range: 365-420nm Fluorescence emission wavelength range: 520-650nm Concentration: 3mg/ml Solvent: Water Size: 3-7nm Product Features Quantum confinement effect: Due to the size of quantum dots being close to or smaller than the Bohr radius of excitons, the movement of electrons and holes within them is restricted, resulting in unique quantum effects. Adjustable optical properties: By changing the size and shape of quantum dots, their emission wavelength and spectral characteristics can be precisely controlled, achieving wide spectral coverage from ultraviolet to infrared. High fluorescence quantum yield: Quantum dots typically have a high fluorescence quantum yield, which means they can efficiently convert absorbed light energy into fluorescence emission. Good stability: Quantum dots have high photostability and chemical stability, and can maintain their optical and electrical properties under various environmental conditions. Application Fields Optoelectronic devices: Quantum dots are widely used in optoelectronic devices such as LEDs, photodetectors, and solar cells. By adjusting their size and composition, the performance of the devices can be optimized. Display: Quantum dot display technology utilizes the luminescent properties of quantum dots to achieve high color gamut, high contrast, and low power consumption display effects, becoming an important development direction for the next generation of display technology. Biomarkers and Imaging: Quantum dots that have been chemically modified can be specifically linked to biomolecules, and are used in fields such as cell labeling, in vivo imaging, and disease diagnosis. Sensors: Quantum dot sensors utilize the optical and electrical properties of quantum dots to detect specific substances with high sensitivity, and are widely used in fields such as environmental monitoring, food safety, and medical diagnosis. Related Information Note: The excitation, emission wavelength, and surface ligands of semiconductor quantum dots can be customized according to requirements, such as amino and carboxyl groups (such as mercaptoacetic acid and mercaptoacetic acid). Please e-mail for the detailed characterization data. E-mail:sales@xfnano.com