Magneto-optical investigation on YBa2Cu3O7−x thin films on SrTiO3

2006 ◽  
Vol 437-438 ◽  
pp. 336-340 ◽  
Author(s):  
Dimitrios Vassiloyannis
Keyword(s):  
Thin Films ◽  
Optical Investigation

Mössbauer and optical investigation of Co3−x Fe x O4 thin films grown by sol-gel process

ICAME 2005 ◽  
2006 ◽  
pp. 1363-1369
Author(s):  
Kwang Joo Kim ◽  
Bee Kyung Kim ◽  
Young Ran Park ◽  
Geun Young Ahn ◽  
Chul Sung Kim ◽  
...  
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Optical Investigation ◽  
Sol Gel Process

Optical investigation on zinc doped cadmium sulphide nanocrystalline thin films

2016 ◽  
Vol 16 (7) ◽  
pp. 799-804 ◽  
Author(s):  
J.R. Jayaramaiah ◽  
R. Shamanth ◽  
V. Jayanth ◽  
K.S. Shamala
Keyword(s):  
Thin Films ◽  
Cadmium Sulphide ◽  
Optical Investigation ◽  
Nanocrystalline Thin Films

scholarly journals Optical spectroscopic analysis of annealed Cd1−xZnxSe thin films deposited by close space sublimation technique

2016 ◽  
Vol 34 (4) ◽  
pp. 828-833 ◽  
Author(s):  
Ijaz Ali ◽  
Amjid Iqbal ◽  
Arshad Mahmood ◽  
A. Shah ◽  
M. Zakria ◽  
...  
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Optical Constants ◽  
Empirical Relation ◽  
Optical Transmittance ◽  
Oscillator Model ◽  
Optical Investigation ◽  
Dispersion Parameters ◽  
Zn Content ◽  
Space Sublimation

AbstractCd1−xZnxSe (x = 0, 0.40 and 1) thin films were deposited on a glass substrate at room temperature by closed space sublimation method. Optical investigation has been performed using spectrophotometry and ellipsometry. It has been found that for as deposited films the optical band gap increased and the optical constants decreased with increasing Zn content. To improve the optical properties of Cd1−xZnxSe thin films annealing effect at 400 °C was taken into consideration for various Zn contents. It was observed that the optical transmittance and band gap decreased while optical constants increased with increasing Zn content after annealing. The effects of composition and annealing on the optical dispersion parameters Eo and Ed were investigated using a single effective oscillator model. The calculated value of the average excitation energy Eo obeys the empirical relation (Eo = Eg/2) obtained from the single oscillator model.

Electron Optical Investigation of Thin Films of Lithium on Tantalum, Platinum, and Carbon Substrates

1962 ◽  
Vol 33 (8) ◽  
pp. 2613-2618 ◽  
Author(s):  
A. L. Esquivel ◽  
Ai‐Chun Fung ◽  
H. U. Rhoads ◽  
A. H. Weber
Keyword(s):  
Thin Films ◽  
Optical Investigation ◽  
Carbon Substrates

scholarly journals Optical investigation of GaSb thin films grown on GaAs by metalorganic magnetron sputtering

2008 ◽  
Vol 516 (16) ◽  
pp. 5493-5497 ◽  
Author(s):  
Z.C. Feng ◽  
F.C. Hou ◽  
J.B. Webb ◽  
Z.X. Shen ◽  
E. Rusli ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Optical Investigation

Effect of Crystallite Size on the Optical and Structural Properties of Gadolinium-Doped Zinc Oxide

2016 ◽  
Vol 1133 ◽  
pp. 414-418 ◽  
Author(s):  
Nurul Fadzilah Ab Rasid ◽  
Siti Nooraya Mohd Tawil ◽  
Norhidayah Che Ani ◽  
Mohd Zainizan Sahdan
Keyword(s):  
Thin Films ◽  
Crystallite Size ◽  
Diluted Magnetic Semiconductor ◽  
Sol Gel ◽  
Magnetic Semiconductor ◽  
Band Gap Energy ◽  
Optical Investigation ◽  
Glass Substrates ◽  
Coating Method ◽  
Diluted Magnetic

Rare earth Gd-doped ZnO thin films were prepared by a simple sol-gel spin coating method in order to search for a new functional diluted magnetic semiconductor for potential application in spintronics. The thin films were deposited onto glass substrates with zinc acetate dehydrate, monoethanolamine and 2-methoxyethanol as a starting material, stabilizer and solvent, respectively. The dopant percentage was increased up to 8%. Optical investigation showed that the crystallinity of the thin films was changing due to the increase of the Gd concentrations and optical band gap energy (Eg) value was estimated to be around 3.12 ~ 3.28 eV using Tauc's model. The crystallite size determined from XRD spectra and the results was found that the value is in the range of 14.42 ~ 21.98 nm.

scholarly journals Investigation of the Role of the Environment on the Photoluminescence and the Exciton Relaxation of CsPbBr3 Nanocrystals Thin Films

2020 ◽  
Vol 10 (6) ◽  
pp. 2148 ◽  
Author(s):  
Marco Anni ◽  
Arianna Cretì ◽  
Yuhai Zhang ◽  
Maria Luisa De Giorgi ◽  
Mauro Lomascolo
Keyword(s):  
Thin Films ◽  
Gas Sensors ◽  
Free Exciton ◽  
Intensity Increase ◽  
Optical Investigation ◽  
Relaxation Dynamics ◽  
Dynamic Effects ◽  
Radiative Relaxation ◽  
Pl Intensity

In this work, we present a detailed optical investigation of the effects of the environment on the photoluminescence (PL) spectra and the relaxation dynamics of pristine and aged CsPbBr3 nanocrystal (NC) thin films. We demonstrate that, contrary to previous results on similar NCs, the PL intensity of pristine NCs is higher when the sample is in wet air than in vacuum, due to the passivation of defects reducing the free exciton trapping and the bound excitons non-radiative relaxation. The aged NCs show a PL intensity increase in wet air nine times stronger than the pristine ones, due to an interplay between static and dynamic effects, increasing the number of emitting NCs and reducing the non-radiative recombination rate of free excitons. These results improve the understanding of the possible interactions between perovskite NCs and the environment, which could be relevant for the development of optical gas sensors exploiting perovskite NCs.

Sign in / Sign up

Export Citation Format

Share Document