Size Dependence of Excitation-Energy-Related Surface Trapping Dynamics in PbS Quantum Dots

2015 ◽  
Vol 119 (13) ◽  
pp. 7517-7524 ◽  
Author(s):  
Heejae Chung ◽  
Hyekyoung Choi ◽  
Dongho Kim ◽  
Sohee Jeong ◽  
Jiwon Kim
Keyword(s):  
Quantum Dots ◽  
Excitation Energy ◽  
Size Dependence ◽  
Pbs Quantum Dots

scholarly journals Size dependence of carrier dynamics and carrier multiplication in PbS quantum dots

2011 ◽  
Vol 83 (15) ◽  
Author(s):  
Gero Nootz ◽  
Lazaro A. Padilha ◽  
Larissa Levina ◽  
Vlad Sukhovatkin ◽  
Scott Webster ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Size Dependence ◽  
Carrier Dynamics ◽  
Carrier Multiplication ◽  
Pbs Quantum Dots

Size dependence saturation and absorption of PbS quantum dots

2004 ◽  
Vol 35 (8) ◽  
pp. 629-633 ◽  
Author(s):  
K Kang ◽  
K Daneshvar ◽  
R Tsu
Keyword(s):  
Quantum Dots ◽  
Size Dependence ◽  
Pbs Quantum Dots

scholarly journals Size dependence of efficiency of PbS quantum dots in NiO-based dye sensitised solar cells and mechanistic charge transfer investigation

Nanoscale ◽  
2017 ◽  
Vol 9 (40) ◽  
pp. 15566-15575 ◽  
Author(s):  
Mahfoudh Raissi ◽  
Muhammad T. Sajjad ◽  
Yann Pellegrin ◽  
Thomas Jean Roland ◽  
Stéphane Jobic ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Charge Transfer ◽  
Driving Force ◽  
Size Dependence ◽  
Pbs Quantum Dots

A low driving force (−0.3 eV) is sufficient for PbS quantum dots to inject holes into NiO, and the excitons in PbS decay by both reductive and oxidative quenching.

scholarly journals Size Dependence of the Resonant Third-Order Nonlinear Refraction of Colloidal PbS Quantum Dots

Photonics ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 39
Author(s):  
Ivan D. Skurlov ◽  
Evgeniia A. Ponomareva ◽  
Azat O. Ismagilov ◽  
Sergey E. Putilin ◽  
Ilia A. Vovk ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lead Sulfide ◽  
Figure Of Merit ◽  
Nonlinear Response ◽  
Size Dependence ◽  
Nonlinear Refraction ◽  
Colloidal Solutions ◽  
Third Order ◽  
Lead Sulfide Quantum Dots ◽  
Pbs Quantum Dots

Due to their high resonant third-order nonlinear response, lead sulfide quantum dots (QDs) are potential materials for applications in the field of nonlinear optics. In this paper, we implement the Z-scan method to study the resonant nonlinear response of lead sulfide QDs in colloidal solutions. We managed to measure the purely intrinsic resonant nonlinear response, free of thermal contribution. We report that the lead sulfide QD third-order nonlinear response per QD shows an unconventional increase. A figure of merit for QD nonlinearity grows as a power function with a factor of 2.9.

Synergistic Effect Between Halide Perovskites and PbS Quantum Dots

2020 ◽  
Author(s):  
Iván Mora-Seró ◽  
Sofia Masi ◽  
David Macias-Pinilla ◽  
Carlos Echeverría-Arrondo ◽  
Juan Ignacio Climente
Keyword(s):  
Quantum Dots ◽  
Synergistic Effect ◽  
Halide Perovskites ◽  
Pbs Quantum Dots

scholarly journals A method for studying pico to microsecond time-resolved core-level spectroscopy used to investigate electron dynamics in quantum dots

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Tamara Sloboda ◽  
Sebastian Svanström ◽  
Fredrik O. L. Johansson ◽  
Aneta Andruszkiewicz ◽  
Xiaoliang Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electron Injection ◽  
Core Level ◽  
Pump Laser ◽  
Repetition Frequency ◽  
Specific Information ◽  
Single Experiment ◽  
Time Resolved ◽  
X Ray ◽  
Pbs Quantum Dots

AbstractTime-resolved photoelectron spectroscopy can give insights into carrier dynamics and offers the possibility of element and site-specific information through the measurements of core levels. In this paper, we demonstrate that this method can access electrons dynamics in PbS quantum dots over a wide time window spanning from pico- to microseconds in a single experiment carried out at the synchrotron facility BESSY II. The method is sensitive to small changes in core level positions. Fast measurements at low pump fluences are enabled by the use of a pump laser at a lower repetition frequency than the repetition frequency of the X-ray pulses used to probe the core level electrons: Through the use of a time-resolved spectrometer, time-dependent analysis of data from all synchrotron pulses is possible. Furthermore, by picosecond control of the pump laser arrival at the sample relative to the X-ray pulses, a time-resolution limited only by the length of the X-ray pulses is achieved. Using this method, we studied the charge dynamics in thin film samples of PbS quantum dots on n-type MgZnO substrates through time-resolved measurements of the Pb 5d core level. We found a time-resolved core level shift, which we could assign to electron injection and charge accumulation at the MgZnO/PbS quantum dots interface. This assignment was confirmed through the measurement of PbS films with different thicknesses. Our results therefore give insight into the magnitude of the photovoltage generated specifically at the MgZnO/PbS interface and into the timescale of charge transport and electron injection, as well as into the timescale of charge recombination at this interface. It is a unique feature of our method that the timescale of both these processes can be accessed in a single experiment and investigated for a specific interface.

Temperature-induced PbS quantum dots with tunable broadband wavelength grown by atomic layer deposition

2021 ◽  
Vol 546 ◽  
pp. 149086
Author(s):  
Xiangping Pan ◽  
Yanhua Dong ◽  
Ming Jia ◽  
Jianxiang Wen ◽  
Caiyun Su ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Layer Deposition ◽  
Pbs Quantum Dots

scholarly journals Colloidal PbS quantum dots for visible-to-near-infrared optical-internet-of-things

2021 ◽  
pp. 1-1
Author(s):  
Aigerim Tankimanova ◽  
Chun Hong Kang ◽  
Omar Alkhazragi ◽  
Haodong Tang ◽  
Meiwei Kong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Internet Of Things ◽  
Near Infrared ◽  
Optical Internet ◽  
Pbs Quantum Dots
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