935115

Infrared PbS quantum dots

λ_max, 2000 nm, 100 mg/mL (in toluene)

• Synonym(s): Fluorescent nanocrystals, INFIQ^® quantum dots, Lead based core type QDs
• Linear Formula: PbS
• CAS Number: 1314-87-0
• Enzyme Commission number: 215-246-6
• MDL number: MFCD00016280
• UNSPSC Code: 12352302
• PubChem Substance ID: 24863151
• NACRES: NA.21

Properties

• description: > 2 (peak/valley ratio)
• Quality Level: 100
• form: liquid
• concentration: 100 mg/mL (in toluene)
• particle size: <15 nm (nanoparticle)
• λmax: <150 nm (FWHM); 2000 nm
• storage temp.: 2-8°C
• InChI: 1S/Pb.S
• InChI key: XCAUINMIESBTBL-UHFFFAOYSA-N

Description

General description

Lead sulfide (PbS) quantum dots (QD) are semiconducting inorganic nanoparticles, offered as a concentrated solution (100 mg/mL) in toluene. The most important property of a PbS QD is its excitonic absorption peak wavelength, which is controlled by the particle size. These infrared PbS quantum dots have an excitonic absorption peak wavelength of 2000 nm and a narrow peak width (FWHM<150 nm), indicating that they are a monodisperse ensemble of nanoparticles, all a very similar size. This is highly desirable in applications where a flat energy landscape, a narrow energy distribution, and the formation of superlattices yield improved performance. In addition, these PbS QDs have versatile surface chemistry. The ligands on the surface of the QDs are long-chain organic molecules optimized for colloidal stability and processability in a wide array of organic solvents.

Application

Our Infrared PbS quantum dots with λ_max 2000 nm are well suited for applications in near infrared (NIR) detection and absorption due to their excellent light absorption performance, low cost, and simple deposition process. These quantum dots are suitable for research applications in photodetectors, photovoltaics, and infrared light emitting diodes (LEDs) particularly in the fields of automation, surveillance and security, night vision, communications, and medical health. The application of PbS-based quantum dot technology often requires a further surface modification step in the preparation of superlattices and thin films. These PbS quantum dots can be subject to solid state ligand exchanges using cross-linking materials such as benzenedithiol and ethanedithiol, or solution-phase ligand exchanged using a wide variety of organic and inorganic ligand species.

Legal Information

Product of Quantum Science Ltd

INFIQ is a registered trademark of Quantum Science Ltd.

Safety Information

• pictograms: GHS02,GHS08,GHS07,GHS09
• signalword: Danger
• hcodes: H225,H304,H315,H336,H360FD,H373,H411
• pcodes: P202 - P210 - P273 - P301 + P310 - P303 + P361 + P353 - P331
• Hazard Classifications: Aquatic Chronic 2 - Asp. Tox. 1 - Flam. Liq. 2 - Repr. 1A - Skin Irrit. 2 - STOT RE 2 - STOT RE 2 Inhalation - STOT SE 3
• target_organs: Central nervous system
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 3
• flash_point_f: 39.2 °F
• flash_point_c: 4 °C