Photobrightening and photodarkening in PbS quantum dots
Literature Information
Jeffrey J. Peterson, Todd D. Krauss
Fluorescence spectroscopy is utilized to investigate photodarkening and photobrightening behaviors in PbS quantum dots (QDs) subjected to various environmental conditions. We are able to separate contributions from charge trapping to a long-lived optically dark state (single particle fluorescence blinking) and irreversible photooxidation to the overall photodarkening behavior. Both processes produce effects that are potentially detrimental for emission-based technological applications. Charge trapping is the dominant mechanism on short time scales (<3 s), exhibits no particle size- or environmental-dependence, is reversible, and is an order of magnitude faster compared to CdSe QDs. Photooxidation is the dominant mechanism on long time scales (50–100 s), is strongly dependent on particle size and environmental atmosphere, and results in irreversible decreases in emission intensity, large blue shifts of emission maximum, and increases in particle size distribution.
Related Literature
Proton relaxation and intermolecular structure of liquid formic acid: a nuclear magnetic resonance study
DOI: 10.1039/B110358J
Infrared and Raman spectra, conformational stability, vibrational assignment, ab initio calculations and r0 structural parameters for N-methylpropargyl amine
Gamil A. Guirgis, Stephen Bell, Chao Zheng, James R. Durig
DOI: 10.1039/B109222G
The nature of proton transport in fully hydrated Nafion®
Stephen J. Paddison, Reginald Paul
DOI: 10.1039/B109792J
Mechanism of the magnetic field dependence for the liquid phase photoreaction in the nanotube of MCM-41
Masaharu Okazaki, Kazumi Toriyama, Kiichi Oda, Toshio Kasai
DOI: 10.1039/B110851D
From degeneration to damping of electrochemical oscillation induced by temperature controlling of heat-compensation type
Jinglei Lei, Jiuli Luo
DOI: 10.1039/B108572G
On the response of simple reactors to regular trains of pulses
DOI: 10.1039/B109522F
Co-existence of hydrated electron and metal di-cation in [Mg(H2O)n]+
DOI: 10.1039/B109774C
Scaling and dynamics of “flow distributed oscillation patterns” in the Belousov–Zhabotinsky reaction
R. Tóth, V. Gáspár
DOI: 10.1039/B107627B
Rate constants for the reaction of HO2 radicals with cyclopentane and propane between 673 and 783 K
S. M. Handford-Styring, R. W. Walker
DOI: 10.1039/B108578F
Fluid phase diagrams of ternary systems with one volatile component and immiscibility in two of the constituent binary mixtures
DOI: 10.1039/B109275H
You might also like
What regulatory guidelines apply to 6-Bromo-2-methylimidazo[1,2-a]pyrimidine (CAS: 1111638-05-1)?
6-Bromo-2-methylimidazo[1,2-a]pyrimidine (CAS: 1111638-05-1) falls under various...
Are there alternatives to 1-Pyrrolidineethanol, β-methyl-α-phenyl-, (αS,βR) (CAS: 123620-80-4) in synthesis?
While there are no direct alternatives, similar compounds like 1-Pyrrolidineetha...
Is 4-Methyl-2,6-bis(2-methyl-2-propanyl)phenyl methylcarbamate (CAS: 1918-11-2) safe?
4-Methyl-2,6-bis(2-methyl-2-propanyl)phenyl methylcarbamate (CAS: 1918-11-2) is ...
How should 2-(3-Bromo-4-fluorophenyl)-1,3-dioxolane (CAS: 77771-04-1) be stored?
2-(3-Bromo-4-fluorophenyl)-1,3-dioxolane (CAS: 77771-04-1) should be stored in a...
What are the physical and chemical properties of 4,5,6,7-Tetrahydro-1H-indazole hydrochloride (CAS: 18161-11-0)?
4,5,6,7-Tetrahydro-1H-indazole hydrochloride is a white crystalline solid with a...
What is (2R)-1-Methoxy-3-phenyl-2-propanamine (CAS: 59919-07-2)?
(2R)-1-Methoxy-3-phenyl-2-propanamine is a chiral organic compound with the CAS ...
What industries use Ethyl 1-(1-phenylethyl)-1H-imidazole-5-carboxylate (CAS: 56649-47-9)?
Ethyl 1-(1-phenylethyl)-1H-imidazole-5-carboxylate is used in various industries...
What regulatory guidelines apply to 4-[(1E,3S)-1-(4-Hydroxyphenyl)-1,4-pentadien-3-yl]phenol (CAS: 17676-24-3)?
4-[(1E,3S)-1-(4-Hydroxyphenyl)-1,4-pentadien-3-yl]phenol (CAS: 17676-24-3) falls...
What industries use (S)-3-Amino-5-phenylpentanoic acid hydrochloride (CAS: 331846-97-0)?
(S)-3-Amino-5-phenylpentanoic acid hydrochloride is primarily used in the pharma...
How is 7-methoxy-1-benzothiophene-2-carboxylic acid (CAS: 88791-07-5) typically synthesized?
7-Methoxy-1-benzothiophene-2-carboxylic acid is typically synthesized by reactin...
Source Journal
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











![(3R)-4-(4-Chlorophenyl)-3-({[(2-methyl-2-propanyl)oxy]carbonyl}amino)butanoic acid structure (3R)-4-(4-Chlorophenyl)-3-({[(2-methyl-2-propanyl)oxy]carbonyl}amino)butanoic acid structure](https://static.chemtradehub.com/structs/218/218608-96-9-f871.webp)


![2-Methyl-2-propanyl 4-{2-fluoro-5-[(4-oxo-3,4-dihydro-1-phthalazinyl)methyl]benzoyl}-1-piperazinecarboxylate structure 2-Methyl-2-propanyl 4-{2-fluoro-5-[(4-oxo-3,4-dihydro-1-phthalazinyl)methyl]benzoyl}-1-piperazinecarboxylate structure](https://static.chemtradehub.com/structs/763/763114-04-1-65a9.webp)