Spin-Cast Deposition of CdSe-CdS Core-Shell Colloidal Quantum Dots on Doped GaAs Substrates: Structural and Optical Characterization

2007 ◽  
Vol 6 (4) ◽  
pp. 413-420 ◽  
Author(s):  
Adrienne D. Stiff-Roberts ◽  
Wanming Zhang ◽  
Jian Xu ◽  
Hongying Peng ◽  
Henry O. Everitt
Keyword(s):  
Quantum Dots ◽  
Optical Characterization ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Gaas Substrates

Surface Organic Ligands-Passivated Quantum Dots: Toward High-Performance Light-Emitting Diodes with Long Lifetime

2021 ◽  
Author(s):  
Lishuang Wang ◽  
Ying Lv ◽  
Jie Lin ◽  
Jialong Zhao ◽  
Xingyuan Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Ligands ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Light Emitting ◽  
Long Lifetime

For quantum dots light-emitting diodes (QLEDs), typical colloidal quantum dots (QDs) are usually composed of a core/shell heterostructure which is covered with organic ligands as surface passivated materials to confine...

Optical Characterization of CdSe Colloidal Quantum Dot/ MEH-PPV Polymer Nanocomposites Spin-cast on GaAs Substrates

2006 ◽  
Vol 939 ◽  
Author(s):  
Adrienne D. Stiff-Roberts ◽  
Abhishek Gupta ◽  
Zhiya Zhao
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Optoelectronic Devices ◽  
Photogenerated Electron ◽  
Polymer Nanocomposite ◽  
Colloidal Quantum Dots ◽  
Infrared Light ◽  
Gaas Substrates ◽  
Conducting Polymer Nanocomposite ◽  
Colloidal Quantum Dot

ABSTRACTThe motivation and distinct approach for this work is the use of intraband transitions within colloidal quantum dots for the detection of mid- (3-5 μm) and/or long-wave (8-14 μm) infrared light. The CdSe colloidal quantum dot/MEH-PPV conducting polymer nanocomposite material is well-suited for this application due to the ∼1.5 eV difference between the corresponding electron affinities. Therefore, CdSe colloidal quantum dots embedded in MEH-PPV should provide electron quantum confinement such that intraband transitions can occur in the conduction band. Further, it is desirable to deposit these nanocomposites on semiconductor substrates to enable charge transfer of photogenerated electron-hole pairs from the substrate to the nanocomposite. In this way, optoelectronic devices analogous to those achieved using Stranski-Krastanow quantum dots grown by epitaxy can be realized. To date, there have been relatively few investigations of colloidal quantum dot nanocomposites deposited on GaAs substrates. However, it is crucial to develop a better understanding of the optical properties of these hybrid material systems if such heterostructures are to be used for optoelectronic devices, such as infrared photodetectors. By depositing the nanocomposites on GaAs substrates featuring different doping characteristics and measuring the corresponding Fourier transform infrared absorbance, the feasibility of these intraband transitions is demonstrated at room temperature.

Optical characterization of core–shell quantum dots embedded in synthetic saliva: Temporal dynamics

2015 ◽  
Vol 151 ◽  
pp. 208-212 ◽  
Author(s):  
Juliana F. de Santana ◽  
Viviane Pilla ◽  
Anielle C.A. Silva ◽  
Noelio O. Dantas ◽  
Djalmir N. Messias ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Temporal Dynamics ◽  
Optical Characterization ◽  
Core Shell

scholarly journals Synthesis, Structural and Optical Characterization of CdTeSe/ZnSe and CdTeSe/ZnTe Core/Shell Ternary Quantum Dots for Potential Application in Solar Cells

2016 ◽  
Vol 45 (8) ◽  
pp. 4425-4431 ◽  
Author(s):  
Le Xuan Hung ◽  
Pham Nam Thang ◽  
Hoang Van Nong ◽  
Nguyen Hai Yen ◽  
Vu Đuc Chinh ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Potential Application ◽  
Optical Characterization ◽  
Core Shell

Small-Sized PbSe/PbS Core/Shell Colloidal Quantum Dots

2012 ◽  
Vol 24 (22) ◽  
pp. 4417-4423 ◽  
Author(s):  
Diana Yanover ◽  
Richard K. Čapek ◽  
Anna Rubin-Brusilovski ◽  
Roman Vaxenburg ◽  
Nathan Grumbach ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Core Shell

scholarly journals CdSe/ZnS Colloidal Quantum Dots with Alloyed Core/Shell Interfaces: A Photoluminescence Dynamics Study

2011 ◽  
Vol 120 (5) ◽  
pp. 870-873 ◽  
Author(s):  
K. Dziatkowski ◽  
D. Ratchford ◽  
T. Hartsfield ◽  
X. Li ◽  
Y. Gao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Core Shell
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