Size-dependent band gap of colloidal quantum dots

2006 ◽  
Vol 99 (1) ◽  
pp. 013708 ◽  
Author(s):  
Sotirios Baskoutas ◽  
Andreas F. Terzis
Keyword(s):  
Quantum Dots ◽  
Band Gap ◽  
Colloidal Quantum Dots ◽  
Size Dependent

scholarly journals Quantum Dots and Applications

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 897
Author(s):  
Chang-Yeol Han ◽  
Hyun-Sik Kim ◽  
Heesun Yang
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Band Gap ◽  
Light Emitting Diodes ◽  
Photovoltaic Cells ◽  
Core Shell ◽  
Special Issue ◽  
High Quality ◽  
Light Emitting ◽  
Size Dependent

It is the unique size-dependent band gap of quantum dots (QDs) that makes them so special in various applications. They have attracted great interest, especially in optoelectronic fields such as light emitting diodes and photovoltaic cells, because their photoluminescent characteristics can be significantly improved via optimization of the processes by which they are synthesized. Control of their core/shell heterostructures is especially important and advantageous. However, a few challenges remain to be overcome before QD-based devices can completely replace current optoelectronic technology. This Special Issue provides detailed guides for synthesis of high-quality QDs and their applications. In terms of fabricating devices, tailoring optical properties of QDs and engineering defects in QD-related interfaces for higher performance remain important issues to be addressed.

Mercury Telluride Colloidal Quantum Dots: Electronic Structure, Size-Dependent Spectra, and Photocurrent Detection up to 12 μm

ACS Nano ◽  
2014 ◽  
Vol 8 (8) ◽  
pp. 8676-8682 ◽  
Author(s):  
Sean E. Keuleyan ◽  
Philippe Guyot-Sionnest ◽  
Christophe Delerue ◽  
Guy Allan
Keyword(s):  
Quantum Dots ◽  
Electronic Structure ◽  
Colloidal Quantum Dots ◽  
Mercury Telluride ◽  
Size Dependent

Size-Dependent Fault-Driven Relaxation and Faceting in Zincblende CdSe Colloidal Quantum Dots

ACS Nano ◽  
2018 ◽  
Vol 12 (12) ◽  
pp. 12558-12570 ◽  
Author(s):  
Daniele Moscheni ◽  
Federica Bertolotti ◽  
Laura Piveteau ◽  
Loredana Protesescu ◽  
Dmitry N. Dirin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Size Dependent

Optical Properties of Silicon Quantum Dots

2011 ◽  
Vol 483 ◽  
pp. 760-764 ◽  
Author(s):  
Zheng Rong Qiu ◽  
Hong Yu
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Absorption Spectrum ◽  
Band Gap ◽  
First Principles ◽  
Blue Shift ◽  
Silicon Quantum Dots ◽  
Full Spectrum ◽  
Size Dependent ◽  
Different Diameters

A first-principles study of the optical properties of silicon quantum dots (Si QDs) with different diameters is presented in this paper. Si QDs consisting of 10-220 Si atoms, the corresponding diameter ranges from 6-20 Å, with full termination of the Si interface with H are investigated in detail. The results show that both the band gap and the absorption spectrum of Si QDs are size-dependent. For Si QDs with diameter ranges from 6-20 Å, as the diameter decreases, the band gap increases, and a considerable blue-shift in the absorption spectrum is occurred. This unique property can be used to extend the absorption spectrum of the solar cell by mixing in QDs with different sizes. Therefore, the full spectrum of the sunlight may be utilized more efficiently.

Size-Dependent Exciton Energy of Narrow Band Gap Colloidal Quantum Dots in the Finite Depth Square-Well Effective Mass Approximation

2006 ◽  
Vol 3 (2) ◽  
pp. 269-271 ◽  
Author(s):  
Sotirios Baskoutas ◽  
Andreas F. Terzis ◽  
Wolfram Schommers
Keyword(s):  
Quantum Dots ◽  
Band Gap ◽  
Effective Mass ◽  
Narrow Band ◽  
Finite Depth ◽  
Effective Mass Approximation ◽  
Exciton Energy ◽  
Size Dependent ◽  
Mass Approximation ◽  
Square Well

Using the potential morphing method within the finite depth square-well effective mass approximation, we calculate the exciton energy of narrow band gap colloidal PbS, PbSe, and InAs quantum dots, assuming a size dependent dielectric function. Concerning the behaviour of the effective band gap with the quantum dot radius, our theoretical results agree well with the experimental ones, in contrast with other theoretical models.

Size-Dependent Extinction Coefficients and Transition Energies of Near-Infrared β-Ag2Se Colloidal Quantum Dots

2013 ◽  
Vol 117 (10) ◽  
pp. 5424-5428 ◽  
Author(s):  
Marc-Antoine Langevin ◽  
Dany Lachance-Quirion ◽  
Anna M. Ritcey ◽  
Claudine Nì. Allen
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Colloidal Quantum Dots ◽  
Extinction Coefficients ◽  
Transition Energies ◽  
Size Dependent

High performance solution-processed infrared photodetector based on PbSe quantum dots doped with low carrier mobility polymer poly(N-vinylcarbazole)

RSC Advances ◽  
2016 ◽  
Vol 6 (50) ◽  
pp. 44514-44521 ◽  
Author(s):  
Muhammad Sulaman ◽  
Shengyi Yang ◽  
Arfan Bukhtiar ◽  
Chunjie Fu ◽  
Taojian Song ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Band Gap ◽  
High Performance ◽  
Carrier Mobility ◽  
Narrow Band ◽  
Colloidal Quantum Dots ◽  
Infrared Light ◽  
Infrared Photodetector ◽  
Solution Processed

Narrow band-gap colloidal quantum dots (CQDs) are promising materials for flexible electronic, such as infrared light photodetectors and solar cells.

scholarly journals Intraband transition in self-doped narrow band gap colloidal quantum dots

2017 ◽  
Author(s):  
Bertille Martinez ◽  
Clément Livache ◽  
Adrien Robin ◽  
Herve Cruguel ◽  
Sebastien Royer ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Band Gap ◽  
Narrow Band ◽  
Colloidal Quantum Dots ◽  
Intraband Transition
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