Angle-resolved ultraviolet photoelectron spectroscopy and theoretical simulation of a well-ordered ultrathin film of tetratetracontane(n−C44H90)on Cu(100): Molecular orientation and intramolecular energy-band dispersion

1999 ◽  
Vol 60 (12) ◽  
pp. 9046-9060 ◽  
Author(s):  
Daisuke Yoshimura ◽  
Hisao Ishii ◽  
Yukio Ouchi ◽  
Eisuke Ito ◽  
Takayuki Miyamae ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Energy Band ◽  
Molecular Orientation ◽  
Ultrathin Film ◽  
Ultraviolet Photoelectron Spectroscopy ◽  
Theoretical Simulation ◽  
Band Dispersion

Fermi energy band dispersion and orbital symmetry of Bi2Sr2CaCu2Oy studied by non-polarized-light two-dimensional photoelectron spectroscopy

2007 ◽  
Vol 467 (1-2) ◽  
pp. 43-50 ◽  
Author(s):  
Chikako Sakai ◽  
Fumihiko Matsui ◽  
Nobuaki Takahashi ◽  
Sakura Nishino Takeda ◽  
Hiroshi Daimon
Keyword(s):  
Fermi Energy ◽  
Photoelectron Spectroscopy ◽  
Energy Band ◽  
Polarized Light ◽  
Two Dimensional ◽  
Orbital Symmetry ◽  
Band Dispersion

INTRAMOLECULAR ENERGY BAND DISPERSION IN ORIENTED THIN FILM OF n-CF3(CF2)22CF3 STUDIED BY ANGLE-RESOLVED UPS AND THEORETICAL SIMULATION

2002 ◽  
Vol 09 (01) ◽  
pp. 407-412 ◽  
Author(s):  
DAISUKE YOSHIMURA ◽  
KAZUHIKO SEKI ◽  
TAKAYUKI MIYAMAE ◽  
HISAO ISHII ◽  
SHINJI HASEGAWA ◽  
...  
Keyword(s):  
Energy Band ◽  
Emission Spectra ◽  
Photoemission Spectroscopy ◽  
Surface Films ◽  
Theoretical Simulation ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Band Dispersion ◽  
Chain Axis ◽  
Theoretical Simulations ◽  
Long Chain

Electronic structure of perfluorotetracosane [n- CF 3 ( CF 2)22 CF 3; PFT], which is an oligomer of poly(tetrafluoroethylene) (PTFE), was investigated by angle-resolved photoemission spectroscopy (ARUPS) with synchrotron radiation. Theoretical simulations of ARUPS spectra were also performed by the independent atomic center (IAC) approximation combined with ab initio molecular orbital (MO) calculations. Measured normal-emission spectra for end-on oriented (the long-chain axis of PFT is perpendicular to the surface) films showed an incident photon energy dependence due to the intramolecular energy band dispersion. The energy band structure along the long-chain direction of PFT obtained from measured and calculated spectra is also discussed.

Oriented Growth of Model Molecules of Polyethylene and Poly(tetrafluoroethylene) (n-C44H90 and n-C24F50) and Angle-resolved UPS Study of Their Intramolecular Energy Band Dispersion (E=E(k)) Relation

2002 ◽  
Vol 734 ◽  
Author(s):  
Daisuke Yoshimura ◽  
Takayuki Miyamae ◽  
Sinji Hasegawa ◽  
Yukinobu Hosoi ◽  
Yoko Sakurai ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Energy Band ◽  
Film Structure ◽  
Level Shift ◽  
Oriented Growth ◽  
Good Correspondence ◽  
Chain Molecules ◽  
Infrared Reflection ◽  
Band Dispersion

ABSTRACTWe report on the recent progress of our continued effort for the preparation and characterization of well oriented films of tetratetracontane (n-C44H90) and perfluorotetracosane (n-C24F50), which are good model molecules of fundamental polymers, polyethylene (CH2)n and poly(tetrafluoroethylen) (CF2)n, vacuum-deposited on metal surfaces. When the surface of the metal substrate was oxidized, the deposited chain molecules are aligned with their molecular axes vertically standing on the surface, while they lie flat on the surface when atomically clean Cu(100) surface was used. In the case of n-C44H90 on Cu (100), low-energy electron diffraction (LEED) studies revealed that the molecules were also azimuthally aligned with the chain axis almost parallel with the <100> and <010> axis, and infrared reflection-absorption spectroscopy (IR-RAS) enabled detailed studies of the film structure at increasing film thickness._By applying the technique of angle-resolved ultraviolet photoelectron spectroscopy (ARUPS) to these flat-lying molecules, the intramolecular energy-band dispersion relation could be determined, The results agreed well with the results deduced from the previous work using vertically standing molecules assuming an inner potential V0. of –5 eV, confirming the validity of the estimation of V0. Excellent agreement was found between the observed and simulated spectra using the independent-atomic-center (IAC) approximation. Also the value of the vacuum level shift by molecular deposition was deduced for TTC/Cu(100) system to be – 0.3 eV. As for n-C24F50, the E(k) relation deduced in our previous study using vertically standing molecules showed discrepancy with band calculations. The detailed reexamination of the experimental data using IAC calculations for the previous report gave more realistic estimation of V0, and the newly deduced E(k) relation using this data showed good correspondence with theoretical band calculations, thus removing the difficulty in the previous work.

The energy band tailored by Al incorporation in solution-processed IZO TFTs

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37635-37639 ◽  
Author(s):  
Yana Gao ◽  
Jianguo Lu ◽  
Jianhua Zhang ◽  
Xifeng Li
Keyword(s):  
Zinc Oxide ◽  
Energy Level ◽  
Photoelectron Spectroscopy ◽  
Energy Band ◽  
Ultraviolet Photoelectron Spectroscopy ◽  
Visible Spectroscopy ◽  
Spectroscopy Analysis ◽  
Band Energy ◽  
Indium Zinc Oxide ◽  
Uv Visible

An intuitional measurement of energy band tailored aluminum indium zinc oxide (AIZO) work function and valance band energy level was conducted by ultraviolet photoelectron spectroscopy (UPS) along with the UV-visible spectroscopy analysis.

Anisotropic valence band dispersion of single crystal pentacene as measured by angle-resolved ultraviolet photoelectron spectroscopy

2018 ◽  
Vol 33 (20) ◽  
pp. 3362-3370 ◽  
Author(s):  
Yasuo Nakayama ◽  
Masataka Hikasa ◽  
Naoki Moriya ◽  
Matthias Meissner ◽  
Takuma Yamaguchi ◽  
...  
Keyword(s):  
Single Crystal ◽  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Ultraviolet Photoelectron Spectroscopy ◽  
Band Dispersion ◽  
Image Position

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