Synthesis and Optical Properties of Type I CdSe/ZnSe Core–Shell Quantum Dot

2012 ◽  
Vol 4 (5) ◽  
pp. 637-642 ◽  
Author(s):  
Sachin Rawalekar ◽  
M. Venkata Nikhil Raj ◽  
Hirendra N. Ghosh
Keyword(s):  
Optical Properties ◽  
Quantum Dot ◽  
Core Shell ◽  
Type I

Optical properties of type-I PbSe/CdSe core/shell quantum dot

2015 ◽  
Vol 466-467 ◽  
pp. 101-106 ◽  
Author(s):  
S.N. Saravanamoorthy ◽  
A. John Peter ◽  
Chang Woo Lee
Keyword(s):  
Optical Properties ◽  
Quantum Dot ◽  
Core Shell ◽  
Type I ◽  
Cdse Core

Nonlinear optical properties of core shell type II quantum dot structures

2020 ◽  
Vol 128 ◽  
pp. 106246 ◽  
Author(s):  
Musa Çadirci ◽  
Yasemin Gündoğdu ◽  
Erdem Elibol ◽  
Hamdi Şükür Kılıç
Keyword(s):  
Optical Properties ◽  
Quantum Dot ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Core Shell ◽  
Type Ii ◽  
Shell Type

Mathematical modelling of optical properties of CdSe/ZnS core shell quantum dot

Optik ◽  
2018 ◽  
Vol 158 ◽  
pp. 737-746 ◽  
Author(s):  
A. Bouazra ◽  
A. Naifar ◽  
S. Abdi-Ben Nasrallah ◽  
M. Said
Keyword(s):  
Optical Properties ◽  
Quantum Dot ◽  
Mathematical Modelling ◽  
Core Shell

scholarly journals High Tunability of Size Dependent Optical Properties of ZnO@M@Au (M = SiO2, In2O3, TiO2) Core/Spacer/Shell Nanostructure

2019 ◽  
Vol 2 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Gashaw Beyene Kassahun
Keyword(s):  
Optical Properties ◽  
Quantum Dot ◽  
Spectral Region ◽  
Shell Shape ◽  
Core Shell ◽  
Gold Content ◽  
Core Size ◽  
Static Approximation ◽  
Size Dependent ◽  
High Tunability

This theoretical work presents a comparative study of high tunability size dependent optical properties of quantum dot/wire triple layered core shell nanostructure based on the quasi-static approximation of classical electrodynamics embedded in a fixed dielectrics function of host matrix. In this paper, local field enhancement factor (LFEF), refractive index and optical absorbance of nanocomposite are analyzed by varying core size, thickness of spacer and shell as well as dielectrics function of the spacer for the size of the nanocomposite with the range of 20 nm to 40 nm. For both quantum dot and quantum wire triple layered core shell nanostructure (CSNS), there are two resonances in visible and near/in infrared spectral region with high tunability. When the shell thickness increase and therefore increasing the gold content, the surface plasmon resonance (SPR) at the outer interface shifts to higher energy (blue-shifted) and at the inner interface weak peaks and shifted to lower energy (red-shifted). All of three optical properties, depend on core size, dielectrics and thickess of spacer, thickness of shell, shape of composite and filling factor. For the same thickness of spacer and shell of the two configurations, cylindrical triple layered CSNS less pronounced and shifted to infrared red (IR) spectral region which is recommendable for biological and photocatalysis application.      

Synthesis of Type-I CdTe Core and Type-II CdTe/CdS Core/Shell Quantum Dots by a Hydrothermal Method and Their Optical Properties

2017 ◽  
Vol 90 (1) ◽  
pp. 52-58 ◽  
Author(s):  
Taichi Watanabe ◽  
Kohji Takahashi ◽  
Kunio Shimura ◽  
Hang-Beom Bu ◽  
Kim Hyeon-Deuk ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Hydrothermal Method ◽  
Core Shell ◽  
Type I ◽  
Type Ii ◽  
Cdte Core

scholarly journals Phonon Characterization, Structural and Optical Properties of Type-II CdSe/CdTe core/shell and Type-II/type-I CdSe/CdTe/ZnS core/shell/shell Quantum Dots

2020 ◽  
Vol 36 (3) ◽  
Author(s):  
Nguyen Xuan Ca ◽  
Nguyen Thi Hien
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Excitation Power ◽  
Cubic Phase ◽  
Core Shell ◽  
Type I ◽  
Type Ii ◽  
X Ray Diffraction ◽  
Cdte Core ◽  
Observation Results

The CdSe, type-II CdSe/CdTe core/shell and type-II/type-I CdSe/CdTe/ZnS core/shell/shell  quantum dots (QDs) were successfully synthesized in a noncoordinating solvent. The phonon characterizations, optical properties and structures of the synthesized QDs were characterized by Raman scattering (RS) spectra, photoluminescence (PL) spectroscopy, PL-decay lifetime, absorption spectroscopy (Abs), and X-ray diffraction (XRD). The growth of QDs was monitored by using RS, which demonstrated the formation of correct of the core/shell and core/shell/shell structures. Observation results from XRD reveal that all QDs crystallize in the cubic phase with zinc-blende structure. The typical characteristics of spatially indirect recombination for type-II QDs were observed through Abs and PL spectroscopy. The ZnS shell significantly enhanced the PL quantum yeild (QY), the optical durability, the chemical stability and separating CdSe/CdTe QDs from the surroundings. The effect of excitation power on the PL properties of the CdSe core,  CdSe/CdTe and CdSe/CdTe/ZnS QDs has been investigated.

Spectroscopy and Femtosecond Dynamics of Water Soluble Type I CdSe/ZnS Core–Shell Quantum Dot

2013 ◽  
Vol 5 (10) ◽  
pp. 1354-1363 ◽  
Author(s):  
Pallavi Singhal ◽  
Sachin Rawalekar ◽  
Sreejith Kaniyankandy ◽  
Hirendra N. Ghosh
Keyword(s):  
Quantum Dot ◽  
Water Soluble ◽  
Core Shell ◽  
Type I ◽  
Femtosecond Dynamics
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