scholarly journals Enhancing photo-reduction quantum efficiency using quasi-type II core/shell quantum dots

2016 ◽  
Vol 7 (7) ◽  
pp. 4125-4133 ◽  
Author(s):  
Yanyan Jia ◽  
Jinquan Chen ◽  
Kaifeng Wu ◽  
Alex Kaledin ◽  
Djamaladdin G. Musaev ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Quantum Efficiency ◽  
Shell Thickness ◽  
Removal Rate ◽  
Core Shell ◽  
Type Ii ◽  
Fast Increase

Enhancing photoreduction quantum yield in core/shell QDs through an unexpectedly fast increase of hole removal rate with shell thickness.

Interband Optical Transition Energies in Type-II PbSe/PbS Core/Shell Quantum Dots

2017 ◽  
Vol 6 (1) ◽  
pp. 80-86
Author(s):  
S. N. Saravanamoorthy ◽  
A. John Peter
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Shell Thickness ◽  
Optical Transition ◽  
Hole Pair ◽  
Core Shell ◽  
Type Ii ◽  
Electron Hole ◽  
Transition Energies ◽  
Electron Hole Pair

Electronic and optical properties of Type-II lead based core/shell semiconducting quantum dots are reported. Binding energies of electron–hole pair, optical transition energies and the absorption coefficients are investigated taking into account the geometrical confinement in PbSe/PbS core/shell quantum dot nanostructure. The energies are obtained with the increase of shell thickness for various inner core radii. The probability densities of electron and hole wave functions of radial coordinate of the core PbSe and PbS shell quantum dots are presented. The optical transition energy with the spatial confinement is brought out. The electronic properties are obtained using variational approach whereas the compact density matrix method is employed for the nonlinear optical properties. The results show that (i) a decrease in binding energy is obtained when the shell thickness increases due to more separation of electron–hole pair and (ii) the energy band gap decreases with the increase in the shell thickness resulting in the reduction of the higher energy interband transitions.

Shell-Thickness-Dependent Biexciton Lifetime in Type I and Quasi-Type II CdSe@CdS Core/Shell Quantum Dots

2018 ◽  
Vol 122 (25) ◽  
pp. 14091-14098 ◽  
Author(s):  
Degui Kong ◽  
Yanyan Jia ◽  
Yueping Ren ◽  
Zhaoxiong Xie ◽  
Kaifeng Wu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Shell Thickness ◽  
Core Shell ◽  
Type I ◽  
Type Ii

Controllable chiral behavior of type‐II core/shell quantum dots adjusted by shell thickness and coordinated ligands

Chirality ◽  
2021 ◽  
Author(s):  
Xiao Shao ◽  
Tianyong Zhang ◽  
Bin Li ◽  
Yue Wu ◽  
Siyi Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Shell Thickness ◽  
Core Shell ◽  
Type Ii

Rational synthesis of novel “giant” CuInTeSe/CdS core/shell quantum dots for optoelectronics

Nanoscale ◽  
2021 ◽  
Vol 13 (36) ◽  
pp. 15301-15310
Author(s):  
Jing-Yin Xu ◽  
Xin Tong ◽  
Lucas V. Besteiro ◽  
Xin Li ◽  
Chenxia Hu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Band Structure ◽  
Shell Thickness ◽  
Optoelectronic Properties ◽  
Core Shell ◽  
Type Ii

We develop a novel type of heterostructured CuInTeSe/CdS “giant” core/shell quantum dots with shell thickness-dependent optoelectronic properties and quasi-type II band structure, which hold great potential for applications in optoelectronics.

scholarly journals Ultrafast optical properties of type-II CdZnS/ZnSe core-shell quantum dots

2018 ◽  
Vol 26 (14) ◽  
pp. 18480 ◽  
Author(s):  
Lingling Ran ◽  
Haiyang Li ◽  
Wenzhi Wu ◽  
Yachen Gao ◽  
Zhijun Chai ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Core Shell ◽  
Type Ii ◽  
Ultrafast Optical

Interfacial strain effect on type-I and type-II core/shell quantum dots

2016 ◽  
Vol 97 ◽  
pp. 489-494 ◽  
Author(s):  
Negar Gheshlaghi ◽  
Hadi Sedaghat Pisheh ◽  
M. Rezaul Karim ◽  
Derya Malkoc ◽  
Hilmi Ünlü
Keyword(s):  
Quantum Dots ◽  
Strain Effect ◽  
Core Shell ◽  
Type I ◽  
Type Ii ◽  
Interfacial Strain
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