scholarly journals Modelling of electronic and optical properties of Cu2SnS3 quantum dots for optoelectronics applications

2019 ◽  
Vol 37 (1) ◽  
pp. 108-115
Author(s):  
M. Irshad Ahamed ◽  
K. Sathish Kumar
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Solar Cell ◽  
Quantum Dot ◽  
Near Infrared ◽  
Infrared Range ◽  
Tin Sulfide ◽  
Bohr Radius ◽  
Energy Bandgap ◽  
Near Infrared Range

AbstractCopper tin sulfide (Cu2SnS3) is a unique semiconductor, whose nanocrystals have attracted researchers’ attention for its tunable energy bandgap and wavelength in visible and near infrared range. Quantum dots which are fabricated from this material are highly suitable for optoelectronics and solar cell applications. This paper discusses the tunable energy bandgap, exciton Bohr radius and wavelength range of wurtzite structure of Cu2SnS3 quantum dots to assess the opportunity to use them in optoelectronics applications. The considerations show that the mole fraction of copper increases as energy bandgap decreases and tunable energy bandgap of this quantum dot material is inversely proportional to the wavelength.

Changes in Optical Properties of in vitro Myocardium Tissue Due to Heating in the Visible and Near-Infrared Range

2008 ◽  
Vol 35 (5) ◽  
pp. 792-796 ◽  
Author(s):  
敖荟兰 Ao Huilan ◽  
邢达 Xing Da ◽  
魏华江 Wei Huajiang ◽  
巫国勇 Wu Guoyong ◽  
鲁建军 Lu Jianjun
Keyword(s):  
Optical Properties ◽  
Near Infrared ◽  
Infrared Range ◽  
Near Infrared Range

Optical properties of a polyimide-fullerene system in the near infrared range (λ=1047 nm)

2003 ◽  
Vol 29 (8) ◽  
pp. 672-675 ◽  
Author(s):  
N. V. Kamanina ◽  
M. O. Iskandarov ◽  
A. A. Nikitichev
Keyword(s):  
Optical Properties ◽  
Near Infrared ◽  
Infrared Range ◽  
Near Infrared Range

Optical properties of bread in the near-infrared range

1988 ◽  
Vol 8 (2) ◽  
pp. 129-139 ◽  
Author(s):  
Christina Skjöldebrand ◽  
Christina Ellbjär ◽  
Claes Göran Andersson ◽  
Tord S. Eriksson
Keyword(s):  
Optical Properties ◽  
Near Infrared ◽  
Infrared Range ◽  
Near Infrared Range

scholarly journals Properties of Bilayer Graphene Quantum Dots for Integrated Optics: An Ab Initio Study

Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 78
Author(s):  
Majid Ghandchi ◽  
Ghafar Darvish ◽  
Mohammad Kazem Moravvej-Farshi
Keyword(s):  
Quantum Dots ◽  
Absorption Spectra ◽  
Integrated Optics ◽  
Light Absorption ◽  
Near Infrared ◽  
Graphene Quantum Dots ◽  
Bilayer Graphene ◽  
Infrared Range ◽  
Out Of Plane ◽  
Near Infrared Range

Due to their bandgap engineering capabilities for optoelectronics applications, the study of nano-graphene has been a topic of interest to researchers in recent years. Using a first-principles study based on density functional theory (DFT) and thermal DFT, we investigated the electronic structures and optical properties of bilayer graphene quantum dots (GQDs). The dielectric tensors, absorption spectra, and the refractive indexes of the bilayer GQDs were obtained for both in-plane and out-of-plane polarization. In addition, we calculated the absorption spectra via time-dependent DFT (TD-DFT) in the linear response regime. The TDDFT results show that a blue shift occurs in the absorption spectrum, which is consistent with the experimental results. In this investigation, we consider triangular and hexagonal GQDs of various sizes with zigzag and armchair edges. Our simulations show that unlike monolayer GQDs, for which light absorption for out-of-plane polarization occurs in the ultraviolet wavelength range of 85–250 nm, the out-of-plane polarization light absorption peaks in the bilayer GQDs appear in the near-infrared range of 500–1600 nm, similar to those in bilayer graphene sheets. The out-of-plane polarization light absorption peaks in the near-infrared range make bilayer GQDs suitable for integrated optics and optical communication applications.

Optical properties of oakwood in the near-infrared range of semi-transparency

2018 ◽  
Vol 57 (23) ◽  
pp. 6657 ◽  
Author(s):  
Leonid Dombrovsky ◽  
Jean-François Henry ◽  
Clarisse Lorreyte ◽  
Hervé Pron ◽  
Jaona Randrianalisoa
Keyword(s):  
Optical Properties ◽  
Near Infrared ◽  
Infrared Range ◽  
Near Infrared Range

scholarly journals MULTI-LAYER WS2 AND MOS2 BASED PLASMONIC SOLAR CELL FOR SMART ENERGY HARVESTING

2020 ◽  
Vol XLIV-4/W3-2020 ◽  
pp. 331-334
Author(s):  
Z. Oumekloul ◽  
Y. Achaoui ◽  
A. Mir ◽  
A. Akjouj
Keyword(s):  
Solar Cell ◽  
Near Infrared ◽  
Electric Field Distribution ◽  
Infrared Range ◽  
Gold Nanowires ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Basic Physics ◽  
Thickness Layer ◽  
Near Infrared Range

Abstract. One of the best challenges regarding the futuristic vision of smart-city technologies is to offer a comfortable self-governance energy, especially when it comes to electricity storage. If one wants to revolutionize a pre-existing way of living, it is inescapable to neglect basic ingredients gathered from basic physics. The topic of Metamaterials represents a key field that might be explored and thus exploited to propose unprecedented ideas for completely no-existing properties and functionalities. Unlike other ambitious techniques, with a simple stratified surface in combination with a suitable choice of materials, it is possible to propose new solar cells operating in a broad range of frequencies. In this paper, we demonstrate a manner to achieve strong coupling interaction between metallic gold nanowires with a WS2 and MoS2 multi-layer. The novelty of this work lies in the drastic stability of the effect of the thickness layer variation on both, absorption performances and the electric field distribution within the visible and near-infrared range. Accordingly, this new design may be considered of prime importance in several areas such as sensing and solar cell efficiency, to cite a few examples.

scholarly journals Measurement method of optical properties of ex vivo biological tissues of rats in the near-infrared range

2020 ◽  
Vol 59 (13) ◽  
pp. D111 ◽  
Author(s):  
Ana Sanchez-Cano ◽  
José Eduardo Saldaña-Díaz ◽  
Lorena Perdices ◽  
Isabel Pinilla ◽  
Francisco Javier Salgado-Remacha ◽  
...  
Keyword(s):  
Optical Properties ◽  
Measurement Method ◽  
Near Infrared ◽  
Ex Vivo ◽  
Biological Tissues ◽  
Infrared Range ◽  
Near Infrared Range
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