scholarly journals Hard x-ray photoemission spectroscopy of LaVO3/SrTiO3 : Band alignment and electronic reconstruction

2021 ◽  
Vol 103 (23) ◽  
Author(s):  
M. Stübinger ◽  
J. Gabel ◽  
P. Scheiderer ◽  
M. Zapf ◽  
M. Schmitt ◽  
...  
Keyword(s):  
Band Alignment ◽  
Photoemission Spectroscopy ◽  
X Ray

scholarly journals Band alignment at memristive metal-oxide interfaces investigated by hard x-ray photoemission spectroscopy

2014 ◽  
Vol 90 (11) ◽  
Author(s):  
C. Lenser ◽  
A. Köhl ◽  
M. Patt ◽  
C. M. Schneider ◽  
R. Waser ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Band Alignment ◽  
Photoemission Spectroscopy ◽  
Oxide Interfaces ◽  
X Ray

Band Alignment of CdS/Cu2ZnSnSe4 Heterointerface and Solar Cell Performances

MRS Advances ◽  
2017 ◽  
Vol 2 (53) ◽  
pp. 3157-3162 ◽  
Author(s):  
Takehiko Nagai ◽  
Shinho Kim ◽  
Hitoshi Tampo ◽  
Kang Min Kim ◽  
Hajime Shibata ◽  
...  
Keyword(s):  
Conduction Band ◽  
Band Alignment ◽  
Photoemission Spectroscopy ◽  
Band Offset ◽  
Valence Band Offset ◽  
X Ray ◽  
Heterojunction Solar Cells ◽  
Conduction Band Offset ◽  
Ultraviolet Photoemission Spectroscopy ◽  
Large Spike

ABSTRACTWe determined that the conduction band offset (CBO) and the valence band offset (VBO) at the CdS/ Cu2ZnSnSe4 (CZTSe) heterointerface are +0.56 and +0.89eV, respectively, by using X-ray photoemission spectroscopy (XPS), ultraviolet photoemission spectroscopy (UPS) and inversed photoemission spectroscopy (IPES). A positive CBO value, so-called “spike” structure, means that the position of conduction band becomes higher than that of absorber layer. The evaluated CBO of +0.56 eV suggests that the conduction band alignment at CdS/CZTSe interface is enough to become an electron barrier. Despite such a large spike structure in the conduction band at the interface, a conversion efficiency of 8.7 % could be obtained for the CdS/CZTSe heterojunction solar cells.

Band alignment at the In2S3/Cu2ZnSnS4 heterojunction interface investigated by X-ray photoemission spectroscopy

2014 ◽  
Vol 116 (4) ◽  
pp. 2173-2177 ◽  
Author(s):  
Lingyan Lin ◽  
Jinling Yu ◽  
Shuying Cheng ◽  
Peimin Lu ◽  
Yunfeng Lai ◽  
...  
Keyword(s):  
Band Alignment ◽  
Photoemission Spectroscopy ◽  
X Ray

Band alignment of lattice-mismatched In0.82Ga0.18As/InP heterojunction determined by x-ray photoemission spectroscopy

2019 ◽  
Vol 125 (10) ◽  
pp. 105704
Author(s):  
Jinping Li ◽  
Guoqing Miao ◽  
Zhiwei Zhang ◽  
Xiao Li ◽  
Hang Song ◽  
...  
Keyword(s):  
Band Alignment ◽  
Photoemission Spectroscopy ◽  
X Ray

Band alignment at the Cu2SnS3/In2S3 interface measured by X-ray photoemission spectroscopy

2015 ◽  
Vol 353 ◽  
pp. 414-418 ◽  
Author(s):  
Hongjie Jia ◽  
Shuying Cheng ◽  
Hong Zhang ◽  
Jinling Yu ◽  
Yunfeng Lai
Keyword(s):  
Band Alignment ◽  
Photoemission Spectroscopy ◽  
X Ray

Epitaxial growth of MgO/Ga2O3 heterostructure and its band alignment studied by X-ray photoemission spectroscopy

2018 ◽  
Vol 57 (7) ◽  
pp. 070304 ◽  
Author(s):  
Norihiro Matsuo ◽  
Naoki Doko ◽  
Yukiko Yasukawa ◽  
Hidekazu Saito ◽  
Shinji Yuasa
Keyword(s):  
Epitaxial Growth ◽  
Band Alignment ◽  
Photoemission Spectroscopy ◽  
X Ray

scholarly journals Energy-band alignment of II-VI/Zn3P2 heterojunctions from x-ray photoemission spectroscopy

2013 ◽  
Vol 113 (20) ◽  
pp. 203705 ◽  
Author(s):  
Jeffrey P. Bosco ◽  
David O. Scanlon ◽  
Graeme W. Watson ◽  
Nathan S. Lewis ◽  
Harry A. Atwater
Keyword(s):  
Energy Band ◽  
Band Alignment ◽  
Photoemission Spectroscopy ◽  
X Ray

Synthesis and characterization of TiN / Ti / AISI 410 coatings

2018 ◽  
Vol 2 (1) ◽  
pp. 7
Author(s):  
S Chirino ◽  
Jaime Diaz ◽  
N Monteblanco ◽  
E Valderrama
Keyword(s):  
Synthesis And Characterization ◽  
Photoemission Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Columnar Grains ◽  
Tin Thin Films ◽  
Steel Aisi ◽  
Interacting Surfaces ◽  
Stainless Steel Aisi

The synthesis and characterization of Ti and TiN thin films of different thicknesses was carried out on a martensitic stainless steel AISI 410 substrate used for tool manufacturing. The mechanical parameters between the interacting surfaces such as thickness, adhesion and hardness were measured. By means of the scanning electron microscope (SEM) the superficial morphology of the Ti/TiN interface was observed, finding that the growth was of columnar grains and by means of EDAX the existence of titanium was verified.  Using X-ray diffraction (XRD) it was possible to observe the presence of residual stresses (~ -3.1 GPa) due to the different crystalline phases in the coating. Under X-ray photoemission spectroscopy (XPS) it was possible to observe the molecular chemical composition of the coating surface, being Ti-N, Ti-N-O and Ti-O the predominant ones.

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>

Electronic Study of Pt-Ga Intermetallic Compounds Using X-Ray Photoemission Spectroscopy

1990 ◽  
Author(s):  
Young K. Kim ◽  
David K. Shuh ◽  
R. S. Williams ◽  
Larry P. Sadwick ◽  
Kang L. Wang
Keyword(s):  
Intermetallic Compounds ◽  
Photoemission Spectroscopy ◽  
X Ray
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