Product Advantages: Small half-peak width of emission spectrum, high luminous efficiency, high stability, emission spectrum covering the near-infrared band.
Product Applications: Electronic communications, liquid crystal displays, light-emitting diodes, solar cells, biofluorescent markers, etc.
Storage Conditions: Sealed, avoid light, and keep at 4°C.
Product Description
Oil-soluble PbS/CdS quantum dots (QDs) are nanomaterials composed of lead sulfide (PbS) core and cadmium sulfide (CdS) shell. The PbS core has unique optical and electronic properties, while the CdS shell improves stability and fluorescence efficiency. Affected by the quantum confinement effect, their optoelectronic properties are related to their size, so the optical properties can be precisely controlled by adjusting their size. These QDs can be dispersed in organic solvents and are therefore oil-soluble, which makes them valuable in applications such as Light emitting diodes, displays and photovoltaic devices.
Product Parameters
| Catalog Number | PL Emission | FWHM | Surface Ligand | Quantum Yield | Solvent |
| GH-QD0025 | 850±50 nm | ≤120 nm | Oleic Acid | ≥60% | Toluene/Hexane/Octane |
| GH-QD0026 | 950±50 nm | ≤120 nm | Oleic Acid | ≥60% | Toluene/Hexane/Octane |
| GH-QD0027 | 1050±50 nm | ≤120 nm | Oleic Acid | ≥60% | Toluene/Hexane/Octane |
| GH-QD0028 | 1150±50 nm | ≤120 nm | Oleic Acid | ≥60% | Toluene/Hexane/Octane |
| GH-QD0029 | 1250±50 nm | ≤120 nm | Oleic Acid | ≥60% | Toluene/Hexane/Octane |
| GH-QD0030 | 1350±50 nm | ≤120 nm | Oleic Acid | ≥60% | Toluene/Hexane/Octane |
| GH-QD0031 | 1450±50 nm | ≤120 nm | Oleic Acid | ≥60% | Toluene/Hexane/Octane |
| GH-QD0032 | 1550±50 nm | ≤120 nm | Oleic Acid | ≥60% | Toluene/Hexane/Octane |
*If you can't find the needed QDs in the table, please send us an inquiry.
Alfa Chemistry always puts product quality in the first place. Our oil-soluble PbS/CdS QDs are rigorously tested to meet the highest industry standards. In addition, we know that each project is unique. This is why our products have a variety of specifications to choose from, and you can customize the characteristics of these QDs according to your specific requirements. If you have any need, please contact us immediately. We look forward to establishing a close cooperative relationship with you.
Related Products
Synthesis of Oil-soluble PbS/CdS QDs via Ion Exchange Procedure
Jiao, Shuang, et al. Journal of Materials Chemistry A 4.19 (2016): 7214-7221.
The power conversion efficiencies (PCEs) of PbS quantum dot-sensitized solar cells (QDSCs) are typically below 6%. This low efficiency is primarily due to significant charge recombination within the QDs and at the QDs/TiO₂/electrolyte interface. To address this, we prepared PbS/CdS quantum dots (QDs) with a core/shell structure through an ion exchange method, which were then used as photosensitizers in the fabrication of sensitized solar cells.
Synthesis Procedure
1) Preparation of Cd Precursor Solution
0.75 mmol of cadmium oxide (CdO) was added to a mixture of 7.5 mL oleic acid (OA) and 7.5 mL octadecene (ODE). The mixture was heated to 230°C, resulting in a light yellow solution of 0.05 M Cd precursor.
2) Ion Exchange Reaction
5.0 mL of the Cd precursor solution was transferred into a 25 mL three-neck flask, which was degassed for approximately 30 minutes at 100°C. The flask was then cooled to 80°C before 5 mL of purified PbS QDs, dispersed in toluene, was injected into the flask.
3) Monitoring the Reaction
The reaction was monitored through UV-Vis absorption spectra and photoluminescence (PL) emission spectra to track the formation of the PbS/CdS QDs.
4) Quenching the Growth
Once the desired QDs were achieved, 5 mL of toluene was added to quench the reaction and stop the growth of the QDs.
Finally, the oil-soluble PbS/CdS core/shell QDs were obtained, ready for use as photosensitizers in solar cell applications.
This synthesis method offers a controlled approach to preparing PbS/CdS core/shell QDs, which are expected to enhance the performance of quantum dot-sensitized solar cells by reducing charge recombination.
