Size-Dependent Exciton Formation Dynamics in Colloidal Silicon Quantum Dots

ACS Nano ◽  
2016 ◽  
Vol 10 (2) ◽  
pp. 2316-2323 ◽  
Author(s):  
Matthew R. Bergren ◽  
Peter K. B. Palomaki ◽  
Nathan R. Neale ◽  
Thomas E. Furtak ◽  
Matthew C. Beard
Keyword(s):  
Quantum Dots ◽  
Silicon Quantum Dots ◽  
Size Dependent ◽  
Formation Dynamics

Size-Dependent Photothermal Performance of Silicon Quantum Dots

2021 ◽  
Vol 125 (6) ◽  
pp. 3421-3431
Author(s):  
İrem Nur Gamze Özbilgin ◽  
Batu Ghosh ◽  
Hiroyuki Yamada ◽  
Naoto Shirahata
Keyword(s):  
Quantum Dots ◽  
Silicon 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 charge storage in amorphous silicon quantum dots embedded in silicon nitride

2003 ◽  
Vol 83 (5) ◽  
pp. 1014-1016 ◽  
Author(s):  
Nae-Man Park ◽  
Sang-Hun Jeon ◽  
Hyun-Deok Yang ◽  
Hyunsang Hwang ◽  
Seong-Ju Park ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Silicon Nitride ◽  
Amorphous Silicon ◽  
Charge Storage ◽  
Silicon Quantum Dots ◽  
Size Dependent

Communication: Photoinduced Carbon Dioxide Binding with Surface-Functionalized Silicon Quantum Dots

2018 ◽  
Author(s):  
Oscar A. Douglas-Gallardo ◽  
Cristián Gabriel Sánchez ◽  
Esteban Vöhringer-Martinez
Keyword(s):  
Carbon Dioxide ◽  
Quantum Dots ◽  
Atmospheric Carbon Dioxide ◽  
Density Functional ◽  
Tight Binding ◽  
Carbon Dioxide Concentration ◽  
Research Area ◽  
Silicon Quantum Dots ◽  
Dependent Model ◽  
Photoinduced Charge

<div> <div> <div> <p>Nowadays, the search of efficient methods able to reduce the high atmospheric carbon dioxide concentration has turned into a very dynamic research area. Several environmental problems have been closely associated with the high atmospheric level of this greenhouse gas. Here, a novel system based on the use of surface-functionalized silicon quantum dots (sf -SiQDs) is theoretically proposed as a versatile device to bind carbon dioxide. Within this approach, carbon dioxide trapping is modulated by a photoinduced charge redistribution between the capping molecule and the silicon quantum dots (SiQDs). Chemical and electronic properties of the proposed SiQDs have been studied with Density Functional Theory (DFT) and Density Functional Tight-Binding (DFTB) approach along with a Time-Dependent model based on the DFTB (TD-DFTB) framework. To the best of our knowledge, this is the first report that proposes and explores the potential application of a versatile and friendly device based on the use of sf -SiQDs for photochemically activated carbon dioxide fixation. </p> </div> </div> </div>

scholarly journals Surface‐Anisotropic Janus Silicon Quantum Dots via Masking on 2D Silicon Nanosheets

2021 ◽  
pp. 2100288
Author(s):  
Marc Julian Kloberg ◽  
Haoyang Yu ◽  
Elisabeth Groß ◽  
Felix Eckmann ◽  
Tassilo M. F. Restle ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Silicon Quantum Dots
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