Abstract
The extinction coefficient per mole of nanocrystals at the first exitonic absorption peak, ε, for high-quality CdTe, CdSe, and CdS nanocrystals was found to be strongly dependent on the size of the nanocrystals, between a square and a cubic dependence. The measurements were carried out using either nanocrystals purified with monitored purification procedures or nanocrystals prepared through controlled etching methods. The nature of the surface ligands, the refractive index of the solvents, the PL quantum yield of the nanocrystals, the methods used for the synthesis of the nanocrystals, and the temperature for the measurements all did not show detectable influence on the extinction coefficient for a given sized nanocrystal within experimental error.
Keywords
NanocrystalMolar absorptivityMaterials scienceCadmium telluride photovoltaicsAttenuation coefficientQuantum yieldQuantum dotAbsorption (acoustics)Refractive indexExtinction (optical mineralogy)Analytical Chemistry (journal)NanotechnologyMineralogyOptoelectronicsChemistryOpticsFluorescenceChromatographyPhysicsComposite material
Affiliated Institutions
Related Publications
Synthesis of highly luminescent wurtzite CdSe/CdS giant-shell nanocrystals using a fast continuous injection route
We synthesized CdSe/CdS giant-shell nanocrystals, with a CdSecore diameter between 2.8 nm and 5.5 nm, and a CdS shell thickness of up to 7-8 nm (equivalent to about 20 monolayer...
Thiol-Capping of CdTe Nanocrystals: An Alternative to Organometallic Synthetic Routes
New approaches to synthesize photostable thiol-capped CdTe nanocrystals are reported. Post-preparative size-selective precipitation and selective photochemical etching have been...
Formation of High-Quality CdTe, CdSe, and CdS Nanocrystals Using CdO as Precursor
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFormation of High-Quality CdTe, CdSe, and CdS Nanocrystals Using CdO as PrecursorZ. Adam Peng and Xiaogang PengView Author Info...
Epitaxial Growth of Highly Luminescent CdSe/CdS Core/Shell Nanocrystals with Photostability and Electronic Accessibility
The synthesis of epitaxially grown, wurtzite CdSe/CdS core/shell nanocrystals is reported. Shells of up to three monolayers in thickness were grown on cores ranging in diameter ...
Synthesis and Characterization of Strongly Luminescing ZnS-Capped CdSe Nanocrystals
We describe the synthesis of ZnS-capped CdSe semiconductor nanocrystals using organometallic reagents by a two-step single-flask method. X-ray photoelectron spectroscopy, transm...
Publication Info
- Year
- 2003
- Type
- article
- Volume
- 15
- Issue
- 14
- Pages
- 2854-2860
- Citations
- 4914
- Access
- Closed
External Links
Social Impact
Altmetric
PlumX Metrics
Social media, news, blog, policy document mentions
Citation Metrics
4914
OpenAlex
Cite This
William W. Yu,
Lianhua Qu,
Wenzhuo Guo
et al.
(2003).
Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals.
Chemistry of Materials
, 15
(14)
, 2854-2860.
https://doi.org/10.1021/cm034081k
Identifiers
- DOI
- 10.1021/cm034081k