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935093

Sigma-Aldrich

Infrared PbS quantum dots

λmax, 1250 nm, 100 mg/mL in toluene

Synonym(s):

Fluorescent nanocrystals, INFIQ® quantum dots, Lead based core type QDs

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About This Item

Linear Formula:
PbS
CAS Number:
MDL number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NA.21

description

λmax > 5 peak/valley ratio

Quality Level

form

liquid

concentration

100 mg/mL in toluene

particle size

<15 nm (Nanoparticle)

λmax

1250 nm
<90 nm (FWHM)

storage temp.

2-8°C

InChI

1S/Pb.S

InChI key

XCAUINMIESBTBL-UHFFFAOYSA-N

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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 1250 nm and a narrow peak width (FWHM<90 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 λmax 1250 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. PbS QDs are promising nanomaterials for 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.

Signal Word

Danger

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 Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

39.2 °F

Flash Point(C)

4 °C


Certificates of Analysis (COA)

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Graphene/PbS quantum dot hybrid structure for application in near-infrared photodetectors
Jeong H, et al.
Scientific Reports, 10, 12475-12475 (2020)
Research Progress in Surface Ligand Exchange of PbS Quantum Dots for Solar Cell Application
You, Hyung, et al.
Applied Sciences, 10, 975-975 (2020)

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