Lead Sulfide Quantum Dot Synthesis, Deposition, and Temperature Dependence Studies of the Stokes Shift

2012 ◽  
Vol 1409 ◽  
Author(s):  
Joanna S. Wang ◽  
Bruno Ullrich ◽  
Gail J. Brown
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Temperature Dependence ◽  
Thermal Energy ◽  
Lead Sulfide ◽  
Stokes Shift ◽  
Thermal Alteration ◽  
Optical Absorbance ◽  
Pbs Quantum Dots

ABSTRACTWe investigated the temperature dependence of the Stokes shift of PbS quantum dots (diameter 4.7 nm) deposited from solution on glass using a specially designed apparatus. By measuring the thermal alteration of the optical absorbance and photoluminescence in the range of 5 K – 300 K, we demonstrate that the Stokes shift shrinks from 135 meV at 5 K to 62 meV at 300 K. Extrapolation of the data presented predict an elimination temperature of the Stokes shift of about 460 K, corresponding to the thermal energy of the sum of prominent PbS phonon energies.

3D superstructures with an orthorhombic lattice assembled by colloidal PbS quantum dots

Nanoscale ◽  
2018 ◽  
Vol 10 (17) ◽  
pp. 8313-8319 ◽  
Author(s):  
Elena V. Ushakova ◽  
Sergei A. Cherevkov ◽  
Aleksandr P. Litvin ◽  
Peter S. Parfenov ◽  
Igor A. Kasatkin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Oleic Acid ◽  
Lead Sulfide ◽  
Organic Matrix ◽  
Orthorhombic Lattice ◽  
3D Network ◽  
New Type ◽  
Self Assembled ◽  
Lead Sulfide Quantum Dots ◽  
Pbs Quantum Dots

We report a new type of metamaterial comprising a highly ordered 3D network of 3–7 nm lead sulfide quantum dots self-assembled in an organic matrix formed by amphiphilic ligands (oleic acid molecules).

All-optical tuning of the Stokes shift in PbS quantum dots

2013 ◽  
Vol 102 (7) ◽  
pp. 071905 ◽  
Author(s):  
B. Ullrich ◽  
J. S. Wang
Keyword(s):  
Quantum Dots ◽  
Stokes Shift ◽  
All Optical ◽  
Pbs Quantum Dots

Nanocrystalline Phosphors for Lighting and Detection Applications

2010 ◽  
Vol 654-656 ◽  
pp. 1130-1133 ◽  
Author(s):  
Christopher J. Summers ◽  
Hisham M. Menkara ◽  
Richard A. Gilstrap ◽  
Mazen Menkara ◽  
Thomas Morris
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Shell Growth ◽  
Stokes Shift ◽  
Thermal Quenching ◽  
High Sensitivity ◽  
In Situ Monitoring ◽  
White Leds ◽  
Sensing Applications ◽  
Improved Stability

We report the development of new nanoparticle phosphors and quantum dot structures designed for applications to enhance the color rendering and efficiency of high brightness white LEDs, as well as for bio-sensing applications. The intrinsic problem of self-absorption, high toxicity, and high sensitivity to thermal quenching of conventional quantum dot systems has prevented their adoption to LED devices. Doped Cd-free quantum dots may circumvent these issues due to their distinct Stokes shift and improved stability at high temperature. We report on the modification of Mn-doped ZnSe/ZnS core-shell quantum dots for application to the (blue diode + yellow emitter) white LED system. Band gap tuning for 460 nm excitation, inorganic shell growth and in-situ monitoring for enhanced efficiency, and analysis of thermal stability will are reported.

scholarly journals Ligand dependent oxidation dictates the performance evolution of high efficiency PbS quantum dot solar cells

2020 ◽  
Vol 4 (1) ◽  
pp. 108-115 ◽  
Author(s):  
David Becker-Koch ◽  
Miguel Albaladejo-Siguan ◽  
Vincent Lami ◽  
Fabian Paulus ◽  
Hengyang Xiang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Lead Sulfide ◽  
High Efficiency ◽  
Photovoltaic Performance ◽  
Continuous Illumination ◽  
Quantum Dot Solar Cells ◽  
The Stability ◽  
Pbs Quantum Dots ◽  
Pbs Quantum Dot

The stability of lead sulfide (PbS) quantum dots (QD) under continuous illumination in oxygenated environments depends on the choice of ligands, determining the evolution of photovoltaic performance of high efficiency PbS QD solar cells.

scholarly journals Temperature dependence of photoluminescence characteristics of excitons in stacked quantum dots and quantum dot chains

2010 ◽  
Vol 107 (7) ◽  
pp. 073506 ◽  
Author(s):  
Osamu Kojima ◽  
Hiroaki Nakatani ◽  
Takashi Kita ◽  
Osamu Wada ◽  
Kouichi Akahane
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Temperature Dependence ◽  
Stacked Quantum Dots

scholarly journals Air-stable PbS quantum dots synthesized with slow reaction kinetics via a PbBr2 precursor

RSC Advances ◽  
2015 ◽  
Vol 5 (84) ◽  
pp. 68579-68586 ◽  
Author(s):  
Lin Yuan ◽  
Robert Patterson ◽  
Wenkai Cao ◽  
Zewen Zhang ◽  
Zhilong Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Resolution ◽  
Quantum Dot ◽  
Reaction Kinetics ◽  
Slow Reaction ◽  
Pbs Quantum Dots ◽  
Pbs Quantum Dot

High resolution of EDX image shows the bromine located on same position of PbS quantum dot.

A simple route for making surfactant free lead sulfide (PbS) quantum dots

2015 ◽  
Vol 65 ◽  
pp. 89-93 ◽  
Author(s):  
Firoz Alam ◽  
Neetesh Kumar ◽  
Viresh Dutta
Keyword(s):  
Quantum Dots ◽  
Lead Sulfide ◽  
Simple Route ◽  
Pbs Quantum Dots

Uncovering the reaction mechanism initiating the nucleation of lead sulfide quantum dots in a hines synthesis

2018 ◽  
Vol 6 (20) ◽  
pp. 9402-9410 ◽  
Author(s):  
James M. Stevenson ◽  
Andrew W. Ruttinger ◽  
Paulette Clancy
Keyword(s):  
Quantum Dots ◽  
Reaction Mechanism ◽  
Quantum Dot ◽  
Computational Methods ◽  
Lead Sulfide ◽  
Lead Sulfide Quantum Dots

Using computational methods we discover a favorable synthesis pathway towards better control and understanding of quantum dot nucleation for photovoltaics.

Quantum-Dot-Sensitized Solar Cells with Water-Soluble and Air-Stable PbS Quantum Dots

2014 ◽  
Vol 118 (10) ◽  
pp. 5142-5149 ◽  
Author(s):  
Askhat N. Jumabekov ◽  
Felix Deschler ◽  
Daniel Böhm ◽  
Laurence M. Peter ◽  
Jochen Feldmann ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Water Soluble ◽  
Sensitized Solar Cells ◽  
Pbs Quantum Dots

scholarly journals Temperature dependence of the photoluminescence emission from thiol-capped PbS quantum dots

2007 ◽  
Vol 90 (10) ◽  
pp. 101913 ◽  
Author(s):  
L. Turyanska ◽  
A. Patanè ◽  
M. Henini ◽  
B. Hennequin ◽  
N. R. Thomas
Keyword(s):  
Quantum Dots ◽  
Temperature Dependence ◽  
Photoluminescence Emission ◽  
Pbs Quantum Dots
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