Shell-dependent blinking behavior and fluorescence dynamics of single ZnSe/CdS core/shell quantum dots

Nanoscale ◽  
2018 ◽  
Vol 10 (39) ◽  
pp. 18696-18705 ◽  
Author(s):  
Xing Guo ◽  
Yanmin Kuang ◽  
Sheng Wang ◽  
Zhaohan Li ◽  
Huaibin Shen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Shell Thickness ◽  
Core Shell ◽  
Cds Quantum Dots ◽  
Emission Properties ◽  
Exciton Recombination ◽  
Recombination Dynamics

Shell thickness regulates the exciton recombination dynamics, blinking behaviors and emission properties of ZnSe/CdS quantum dots.

scholarly journals Effects of shell thickness on the electric field dependence of exciton recombination in CdSe/CdS core/shell quantum dots

2017 ◽  
Vol 7 (6) ◽  
pp. 1871 ◽  
Author(s):  
Clare E. Rowland ◽  
Marc Currie ◽  
Kimihiro Susumu ◽  
Eunkeu Oh ◽  
Gary Kushto ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electric Field ◽  
Field Dependence ◽  
Shell Thickness ◽  
Core Shell ◽  
Electric Field Dependence ◽  
Exciton Recombination

scholarly journals Exciton-Related Raman Scattering, Interband Absorption and Photoluminescence in Colloidal Cdse/Cds Core/Shell Quantum Dots Ensemble

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1274
Author(s):  
Grigor A. Mantashian ◽  
Paytsar A. Mantashyan ◽  
Hayk A. Sarkisyan ◽  
Eduard M. Kazaryan ◽  
Gabriel Bester ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Raman Scattering ◽  
Cross Section ◽  
Core Shell ◽  
Interband Absorption ◽  
Photoluminescence Spectra ◽  
Cds Quantum Dots ◽  
Mass Approximation ◽  
Numerical Discretization ◽  
Size Dispersion

By using the numerical discretization method within the effective-mass approximation, we have theoretically investigated the exciton-related Raman scattering, interband absorption and photoluminescence in colloidal CdSe/CdS core/shell quantum dots ensemble. The interband optical absorption and photoluminescence spectra have been revealed for CdSe/CdS quantum dots, taking into account the size dispersion of the ensemble. Numerical calculation of the differential cross section has been presented for the exciton-related Stokes–Raman scattering in CdSe/CdS quantum dots ensemble with different mean sizes.

scholarly journals Effect of dopant concentration and the role of ZnS shell on optical properties of Sm3+ doped CdS quantum dots

RSC Advances ◽  
2021 ◽  
Vol 11 (14) ◽  
pp. 7961-7971
Author(s):  
N. D. Vinh ◽  
P. M. Tan ◽  
P. V. Do ◽  
S. Bharti ◽  
V. X. Hoa ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Dopant Concentration ◽  
Core Shell ◽  
Cds Quantum Dots ◽  
Cds Qds

The role of samarium (Sm) dopant on the structural, morphological, and optical properties of CdS QDs and CdS/ZnS core/shell QDs was methodically reported.

Temperature-dependent recombination dynamics and electroluminescence characteristics of colloidal CdSe/ZnS core/shell quantum dots

2021 ◽  
Vol 119 (7) ◽  
pp. 073303
Author(s):  
Jialin Wu ◽  
Lixiang Chen ◽  
Yongshuang Zhao ◽  
Zuhong Xiong ◽  
Wenyu Ji ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Core Shell ◽  
Temperature Dependent ◽  
Recombination Dynamics

scholarly journals Quantum Confinement Effect and Photoenhancement of Photoluminescence of PbS and PbS/MnS Quantum Dots

2020 ◽  
Vol 10 (18) ◽  
pp. 6282
Author(s):  
Muhammad Safwan Zaini ◽  
Josephine Ying Chyi Liew ◽  
Shahrul Ainliah Alang Ahmad ◽  
Abdul Rahman Mohmad ◽  
Mazliana Ahmad Kamarudin
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Quantum Confinement ◽  
Shell Thickness ◽  
Quantum Confinement Effect ◽  
Band Gap Energy ◽  
Confinement Effect ◽  
Core Shell ◽  
Lead Sulphide ◽  
Peak Energy

The quantum confinement effect and photoenhancement of photoluminescence (PL) of lead sulphide (PbS) quantum dots (QDs) and lead sulphide/manganese sulphide (PbS/MnS) core shell QDs capped with thiol ligands in aqueous solution were investigated. From PL results, the presence of MnS shells gives a strong confinement effect which translates to higher emission energy in PbS/MnS core shell QDs. Increasing MnS shell thickness from 0.3 to 1.5 monolayers (ML) causes a blueshift of PL peak energies as the charge carriers concentrated in the PbS core region. Enhancement of the PL intensity of colloidal PbS and PbS/MnS core shell QDs has been observed when the samples are illuminated above the band gap energy, under continuous irradiation for 40 min. Luminescence from PbS QDs and PbS/MnS core shell QDs can be strongly influenced by the interaction of water molecules and oxygen present in aqueous solution adsorbed on the QD surface. However, PbS/MnS core shell QDs with a shell thickness of 1.5 ML did not show a PL peak energy stability as it was redshifted after 25 min, probably due to wider size distribution of the QDs.

Fluorescent glucose sensing using CdTe/CdS quantum dots–glucose oxidase complex

2016 ◽  
Vol 8 (14) ◽  
pp. 2967-2970 ◽  
Author(s):  
Liyun Ding ◽  
Bingyu Zhang ◽  
Chuang Xu ◽  
Jun Huang ◽  
Zhilin Xia
Keyword(s):  
Quantum Dots ◽  
Glucose Oxidase ◽  
Fluorescence Probe ◽  
Glucose Sensing ◽  
Core Shell ◽  
Glucose Detection ◽  
Cds Quantum Dots ◽  
The Core

The core/shell quantum dots–glucose oxidase complex has been synthesized and proved as a potential fluorescence probe for glucose detection.

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