scholarly journals Multimodal optical studies of single and clustered colloidal quantum dots for the long-term optical property evaluation of quantum dot-based molecular imaging phantoms

2012 ◽  
Vol 3 (6) ◽  
pp. 1312 ◽  
Author(s):  
HyeongGon Kang ◽  
Matthew L. Clarke ◽  
Silvia H. De Paoli Lacerda ◽  
Alamgir Karim ◽  
Leonard F. Pease ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Molecular Imaging ◽  
Optical Property ◽  
Quantum Dot ◽  
Colloidal Quantum Dots ◽  
Optical Studies ◽  
Property Evaluation ◽  
Imaging Phantoms

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.

Influence of quantum dot concentration on the opto-electronic properties of colloidal quantum-dots LEDs

2020 ◽  
Vol 109 ◽  
pp. 110251
Author(s):  
Huu Tuan Nguyen ◽  
Raja Das ◽  
Anh Tuan Duong ◽  
Soonil Lee
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Electronic Properties ◽  
Colloidal Quantum Dots

Enhancement of efficiency and long-term stability in graphene/Si-quantum-dot heterojunction photodetectors by employing bis(trifluoromethanesulfonyl)-amide as a dopant for graphene

2017 ◽  
Vol 5 (48) ◽  
pp. 12737-12743 ◽  
Author(s):  
Dong Hee Shin ◽  
Chan Wook Jang ◽  
Ju Hwan Kim ◽  
Jong Min Kim ◽  
Ha Seung Lee ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Term Stability ◽  
Long Term Stability ◽  
Si Quantum Dot ◽  
First Time ◽  
Si Quantum Dots

Bis(trifluoromethanesulfonyl)-amide (TFSA) is for the first time employed as a dopant for graphene for graphene/Si-quantum-dots-based photodetectors.

Reduced efficiency roll-off in light-emitting diodes enabled by quantum dot–conducting polymer nanohybrids

2014 ◽  
Vol 2 (25) ◽  
pp. 4974-4979 ◽  
Author(s):  
Wan Ki Bae ◽  
Jaehoon Lim ◽  
Matthias Zorn ◽  
Jeonghun Kwak ◽  
Young-Shin Park ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Conducting Polymers ◽  
Conducting Polymer ◽  
Light Emitting Diodes ◽  
Colloidal Quantum Dots ◽  
Light Emitting

Hybridization of colloidal quantum-dots and conducting polymers improves the efficiency roll-off of quantum-dot light-emitting diodes.

Colloidal quantum dots for optoelectronics

2017 ◽  
Vol 5 (26) ◽  
pp. 13252-13275 ◽  
Author(s):  
A. P. Litvin ◽  
I. V. Martynenko ◽  
F. Purcell-Milton ◽  
A. V. Baranov ◽  
A. V. Fedorov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Recent Progress ◽  
Photovoltaic Cells ◽  
Optoelectronic Devices ◽  
Colloidal Quantum Dots ◽  
New Concepts

This review is focused on new concepts and recent progress in the development of three major quantum dot (QD) based optoelectronic devices: photovoltaic cells, photodetectors and LEDs.

Colloidal quantum dot ligand engineering for high performance solar cells

2016 ◽  
Vol 9 (4) ◽  
pp. 1130-1143 ◽  
Author(s):  
Ruili Wang ◽  
Yuequn Shang ◽  
Pongsakorn Kanjanaboos ◽  
Wenjia Zhou ◽  
Zhijun Ning ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Optoelectronic Devices ◽  
Colloidal Quantum Dots ◽  
Solution Processed ◽  
Light Emitting ◽  
Colloidal Quantum Dot

Colloidal quantum dots (CQDs) are fast-improving materials for next-generation solution-processed optoelectronic devices such as solar cells, photocatalysis, light emitting diodes, and photodetectors.

Efficient FAPbI3-PbS quantum dot graphene-based phototransistors

2021 ◽  
Author(s):  
Samaneh Aynehband ◽  
Maryam Mohammadi ◽  
Rana Poushimin ◽  
Jean-Michel Nunzi ◽  
A. Simchi
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Quantum Dot ◽  
High Performance ◽  
High Mobility ◽  
Charge Carriers ◽  
Colloidal Quantum Dots ◽  
Mobility Of Charge Carriers ◽  
Tunable Optical Properties ◽  
Pbs Quantum Dot

The high mobility of charge carriers in graphene (G) combined with the ease of processing and tunable optical properties of colloidal quantum dots (CQD) have provided high-performance hybrids for the...

scholarly journals Solution processed infrared- and thermo-photovoltaics based on 0.7 eV bandgap PbS colloidal quantum dots

Nanoscale ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 838-843 ◽  
Author(s):  
Yu Bi ◽  
Arnau Bertran ◽  
Shuchi Gupta ◽  
Iñigo Ramiro ◽  
Santanu Pradhan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Solar Spectrum ◽  
Colloidal Quantum Dots ◽  
Solution Processed ◽  
Colloidal Quantum Dot

Colloidal quantum dot photovoltaics with a bandgap of 0.7 eV demonstrate potential to harness the infrared solar spectrum as well as in waste heat recovery.

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