Effect of Metal Doping on Electronic Structure and Visible Light Absorption of SrTiO3 and NaTaO3 (Metal = Mn, Fe, and Co)

2011 ◽  
Vol 115 (16) ◽  
pp. 8305-8311 ◽  
Author(s):  
Xin Zhou ◽  
Jingying Shi ◽  
Can Li
Keyword(s):  
Electronic Structure ◽  
Visible Light ◽  
Light Absorption ◽  
Metal Doping ◽  
Visible Light Absorption

scholarly journals Effect of metal doping on the visible light absorption, electronic structure and mechanical properties of non-toxic metal halide CsGeCl3

RSC Advances ◽  
2018 ◽  
Vol 8 (58) ◽  
pp. 33010-33018 ◽  
Author(s):  
Md. Zahidur Rahaman ◽  
A. K. M. Akther Hossain
Keyword(s):  
Mechanical Properties ◽  
Electronic Structure ◽  
Dft Calculations ◽  
Visible Light ◽  
Light Absorption ◽  
Toxic Metal ◽  
Metal Halide ◽  
Metal Doping ◽  
Visible Light Absorption ◽  
Mn Doped

We have studied the optical, electronic and mechanical properties of Ni and Mn-doped CsGeCl3 using DFT calculations.

Optical properties of nanometer-sized CdO organosol

1998 ◽  
Vol 13 (3) ◽  
pp. 604-609 ◽  
Author(s):  
Wu Xiaochun ◽  
Wang Rongyao ◽  
Zou Bingsuo ◽  
Wang Li ◽  
Liu Shaomei ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Visible Light ◽  
Light Absorption ◽  
Nonlinear Optical ◽  
Visible Light Absorption ◽  
Optical Responses ◽  
Uv Visible ◽  
Trapped States

In this paper, nanometer-sized CdO organosol was prepared by using microemulsion methods. Its electronic structure and optical properties are characterized through UV-visible light absorption, photoluminescence, and Z-scan techniques. Some newfeatures were observed. Fluorescence and nonlinear optical responses are mainly related to surface trapped states.

scholarly journals Influence of molybdenum and technetium doping on visible light absorption, optical and electronic properties of lead-free perovskite CsSnBr3 for optoelectronic applications

RSC Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 2405-2414
Author(s):  
M. I. Kholil ◽  
M. T. H. Bhuiyan ◽  
M. Atikur Rahman ◽  
M. S. Ali ◽  
M. Aftabuzzaman
Keyword(s):  
Solar Cells ◽  
Visible Light ◽  
Electronic Properties ◽  
Light Absorption ◽  
Optoelectronic Properties ◽  
Lead Free ◽  
Metal Doping ◽  
Visible Light Absorption ◽  
Optical And Electronic Properties ◽  
Optoelectronic Applications

In this study, the metal doping enhanced the optoelectronic properties of lead-free perovskite CsSnBr3; hence CsSn0.875Tc0.125Br3 is promising for solar cells and other optoelectronic applications.

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>

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