Thanomngam, Pitiporn

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Thanomngam, Pitiporn
Alternative Name
Thanomngam, P.
Thanomngam, Pittiporn
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Email
pitiporn.th@kmitl.ac.th

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    Item type:Publication,
    Study on optical and electronic properties of Sn-doped ZnPc
    (2013-10-29)
    Rangkasikorn, Adirek
    ;
    Sributr, Chaloempol
    ;
    Rojanasuwan, Sunit
    ;
    Tammarugwattana, Narin
    ;
    Mano, Kitipong
    Sn doped ZnPc films were deposited on intrinsic Si and glass substrates by organic source thermal co-evaporation technique with different deposition rates. Optical properties and electronic structure were characterized by UV-Vis spectroscopy and X-ray photoelectron spectroscopy (XPS) respectively. The UV-Vis results showed that phase transition of ZnPc from α- phase to β-phase occurred when Sn:ZnPc deposition rate is 0.3:0.7 or higher. XPS results indicated that the outer s electron of Sn atom is transferred to the ZnPc. Broadening of the C 1s spectra is observed with the increasing of Sn deposition rate. This broadening corresponds to the change of molecular environment surrounding carbon atoms in the Sn-doped ZnPc films. © (2013) Trans Tech Publications, Switzerland.
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    Item type:Publication,
    Effect of pressure on structural and elastic properties of SnSe: First-principles calculations
    (2022-02-01)
    Phacheerak, Kanoknan
    ;
    Thanomngam, Pitiporn
    ;
    Limpijumnong, Sukit
    Selected structural and elastic properties of an orthorhombic SnSe at an ambient pressure and under high pressures were investigated using first-principles calculations. At ambient pressure, the calculated structural parameters and elastic constants show a good agreement with previously reported values. Effects of pressure on structural and elastic properties were presented and discussed in detail. Moreover, the pressure dependence of selected structural and elastic properties, which relate to phase transition from an orthorhombic phase to the high-pressure phase, was analyzed. We suggested that the phase transition is related to the compression along the c- and b-axis which correspond to C<inf>33</inf> and C<inf>22,</inf> respectively.