Two-dimensional subwavelength meta-nanopillar array for efficient visible light absorption

2013 ◽  
Vol 102 (16) ◽  
pp. 161109 ◽  
Author(s):  
S. Cao ◽  
W. Yu ◽  
T. Wang ◽  
Z. Xu ◽  
C. Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Two Dimensional ◽  
Visible Light Absorption

Structural reconstruction and visible-light absorption versus internal electrostatic field in two-dimensional GaN-ZnO alloys

Nanoscale ◽  
2021 ◽  
Author(s):  
Hanpu Liang ◽  
Yifeng Duan
Keyword(s):  
Visible Light ◽  
Electrostatic Field ◽  
Light Absorption ◽  
Red Shift ◽  
Two Dimensional ◽  
Visible Light Absorption ◽  
Visible Light Range ◽  
Optoelectronic Applications

GaN-ZnO alloys are more promising semiconductors than their counterparts for optoelectronic applications due to the abrupt red shift in the visible-light range. Unfortunately, the strong internal electrostatic field (IEF) seriously...

scholarly journals Rational tuning of high-energy visible light absorption for panchromatic small molecules by a two-dimensional conjugation approach

2016 ◽  
Vol 7 (6) ◽  
pp. 3857-3861 ◽  
Author(s):  
Bo He ◽  
Danylo Zherebetskyy ◽  
Hongxia Wang ◽  
Matthew A. Kolaczkowski ◽  
Liana M. Klivansky ◽  
...  
Keyword(s):  
Visible Light ◽  
Small Molecules ◽  
Electron Acceptor ◽  
Light Absorption ◽  
Rational Design ◽  
High Energy ◽  
Two Dimensional ◽  
Visible Light Absorption

Rational design leads to panchromatic absorption in small molecules by extension of conjugation on two orthogonal axes of an indigo-derived electron acceptor.

Highly efficient heterojunction solar cells enabled by edge-modified tellurene nanoribbons

2020 ◽  
Vol 22 (48) ◽  
pp. 28414-28422
Author(s):  
Yunzhi Gao ◽  
Kai Wu ◽  
Wei Hu ◽  
Jinlong Yang
Keyword(s):  
Solar Cells ◽  
Visible Light ◽  
Band Gap ◽  
Light Absorption ◽  
Carrier Mobility ◽  
Two Dimensional ◽  
Visible Light Absorption ◽  
Heterojunction Solar Cells ◽  
High Carrier Mobility ◽  
High Carrier

Tellurene, a two-dimensional (2D) semiconductor, meets the requirements for optoelectronic applications with desirable properties, such as a suitable band gap, high carrier mobility, strong visible light absorption and high air stability.

The novel two-dimensional photocatalyst SnN3 with enhanced visible-light absorption for overall water splitting

Nanoscale ◽  
2019 ◽  
Vol 11 (40) ◽  
pp. 18628-18639 ◽  
Author(s):  
Shengyao Wu ◽  
Yanqing Shen ◽  
Xu Gao ◽  
Yanyan Ma ◽  
Zhongxiang Zhou
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Light Absorption ◽  
Absorption Capacity ◽  
The Novel ◽  
Two Dimensional ◽  
Visible Light Absorption ◽  
Overall Water Splitting

SnN3 monolayer can conduct overall photocatalytic splitting of water and has ultra-high visible light absorption capacity.

Impact of Rutile Fraction on TiO2 Visible-Light Absorption and Visible-Light-Induced Photocatalytic Activity

2018 ◽  
Author(s):  
David Maria Tobaldi ◽  
Luc Lajaunie ◽  
ana caetano ◽  
nejc rozman ◽  
Maria Paula Seabra ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Solid Phase ◽  
Diffraction Method ◽  
Band Alignment ◽  
Quantitative Phase Analysis ◽  
Transmission Microscopy ◽  
Visible Light Absorption ◽  
X Ray

<div>Titanium dioxide is by far the most utilised semiconductor material for photocatalytic applications. Still, it is transparent to visible-light. Recently, it has been proved that a type-II band alignment for the rutile−anatase mixture would improve its visible-light absorption.</div><div>In this research paper we thoroughly characterised the real crystalline and amorphous phases of synthesised titanias – thermally treated at different temperatures to get distinct ratios of anatase-rutile-amorphous fraction – as well as that of three commercially available photocatalytic nano-TiO2. </div><div>The structural characterisation was done via advanced X-ray diffraction method, namely the Rietveld-RIR method, to attain a full quantitative phase analysis of the specimens. The microstructure was also investigated via an advanced X-ray method, the whole powder pattern modelling. These methods were validated combining advanced aberration-corrected scanning transmission microscopy and high-resolution electron energy-loss spectroscopy. The photocatalytic activity was assessed in the liquid- and gas-solid phase (employing rhodamine B and 4-chlorophenol, and isopropanol, respectively, as the organic substances to degrade) using a light source irradiating exclusively in the visible-range.</div><div>Optical spectroscopy showed that even a small fraction of rutile (2 wt%) is able to shift to lower energies the apparent optical band gap of an anatase-rutile mixed phase. But is this enough to attain a real photocatalytic activity promoted by merely visible-light?</div><div>We tried to give a reply to that question.</div><div>Photocatalytic activity results in the liquid-solid phase showed that a high surface hydroxylation led to specimen with superior visible light-induced catalytic activity (i.e. dye and ligand-to-metal charge transfer complexes sensitisation effects). That is: not photocatalysis <i>sensu-strictu</i>.</div><div>On the other hand, the gas-solid phase results showed that a higher amount of the rutile fraction (around 10 wt%), together with less recombination of the charge carriers, were more effective for an actual photocatalytic oxidation of isopropanol.</div>

Double Doping of NaTaO3 Photocatalysts with Lanthanum and Manganese for Strongly Enhanced Visible-Light Absorption

2019 ◽  
Vol 2 (10) ◽  
pp. 7518-7526 ◽  
Author(s):  
Hanggara Sudrajat ◽  
Mitsunori Kitta ◽  
Nobuyuki Ichikuni ◽  
Hiroshi Onishi
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Visible Light Absorption ◽  
Double Doping
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