نتایج جستجو برای: urbach energy
تعداد نتایج: 666542 فیلتر نتایج به سال:
The decrease of crystal phonon peak intensities in Raman spectra silicon carbide after heavy-ion irradiation is analysed relation to band-gap shrinkage and Urbach edge slope increase arising ...
Zinc sulfide (ZnS) films were deposited through a simple and low cost spray pyrolytic technique using mixed aqueous solutions of zinc nitrate and thiourea. The structural and optical properties of these films were investigated as a function of initial (Zn:S) molar ratio in the precursor solution, which varied between (1:1) and (1:3). X-ray diffraction (XRD) analysis revealed that wurtzite...
Peter Petrik,1,∗ Nitish Kumar, Miklos Fried, Balint Fodor, Gyorgy Juhasz, Silvania F. Pereira, Sven Burger and H. Paul Urbach Institute for Technical Physics and Materials Science, Hungarian Academy of Sciences, H-1121 Budapest, Konkoly Thege u. 29-33 Optics Research Group, Department of Imaging Physics, Faculty of Applied Sciences, Delft University of Technology, P. O. Box 5046, 2600GA Delft, ...
The glass system 42.5P2O5–42.5B2O3–( $$15-x$$ ) Li2O– $$x$$ MoO3 = $$(0, 2.5,5.10 \;{\text{and}}\;15$$ ), was fabricated using a melt-quenching technique. Optical features are examined depending on measuring the absorption and transmission of prepared glasses. energy gap ( $$E_{{{\text{opt}}}}$$ increases from 2.23 to 2.49 e.V. Urbach $$E_{u}$$ decreases 0.513 0.5 Basicity, polarizability, elec...
The objective of this research is to study the influence film thickness on optical and electrical properties prepared NiO thin films. Nickel oxide films have been glass substrates by a spin coating technique using nickel nitrate hexahydrate (Ni(NO 3 ) 2 .6H O) as source materials. process was repeated 11, 13, 15, 17 layer times obtain good film. characterizations were observed be dependent each...
this research is about the political economy of china in central asia. in this research the political & economic interactions affected on chinas political economy in central asia are examined. chinas goal of presence in central asia including political-security, economic and energy goals is described in one part. in another part, the trade relations between china and central asian countries ar...
AIN thin films were grown by ion beam sputter deposition in reactive assistance of N+/N2+ ions on Si (100) substrates. During deposition, assisted energy (EA) was varied as 90 eV and 120 with a post exposure to N2 plasma. The resultant characterized grazing incidence x-ray diffraction (GIXRD) for their structure atomic force microscopy (AFM) root mean square (rms) surface roughness (δ). UV-VIS ...
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