Thickness and ion irradiation induced structural phase changes in the thin films of titanium dioxide

2021 ◽  
pp. 138917
Author(s):  
P. Devaraj ◽  
R. Meena ◽  
P. Sivakumar ◽  
P. Peranantham ◽  
V.V. Siva Kumar ◽  
...  
Keyword(s):  
Thin Films ◽  
Titanium Dioxide ◽  
Ion Irradiation ◽  
Structural Phase ◽  
Phase Changes

scholarly journals Electrochromic Devices Based on Porous Tungsten Oxide Thin Films

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Y. Djaoued ◽  
S. Balaji ◽  
R. Brüning
Keyword(s):  
Thin Films ◽  
Transition Metal Oxides ◽  
Structural Phase ◽  
Phase Changes ◽  
Optical Modulation ◽  
Electrochromic Devices ◽  
Smart Windows ◽  
Porous Thin Films ◽  
Recent Developments ◽  
Ion Intercalation

Recent developments in the synthesis of transition metal oxides in the form of porous thin films have opened up opportunities in the construction of electrochromic devices with enhanced properties. In this paper, synthesis, characterization and electrochromic applications of porous WO3thin films with different nanocrystalline phases, such as hexagonal, monoclinic, and orthorhombic, are presented. Asymmetric electrochromic devices have been constructed based on these porous WO3thin films. XRD measurements of the intercalation/deintercalation of Li+into/from the WO3layer of the device as a function of applied coloration/bleaching voltages show systematic changes in the lattice parameters associated with structural phase transitions in LixWO3. Micro-Raman studies show systematic crystalline phase changes in the spectra of WO3layers during Li+ion intercalation and deintercalation, which agree with the XRD data. These devices exhibit interesting optical modulation (up to ~70%) due to intercalation/deintercalation of Li ions into/from the WO3layer of the devices as a function of applied coloration/bleaching voltages. The obtained optical modulation of the electrochromic devices indicates that, they are suitable for applications in electrochromic smart windows.

Structural phase diagram for ZnS nanocrystalline thin films under swift heavy ion irradiation

2011 ◽  
Vol 406 (21) ◽  
pp. 4150-4154 ◽  
Author(s):  
Shiv P. Patel ◽  
S.A. Khan ◽  
A.K. Chawla ◽  
R. Chandra ◽  
J.C. Pivin ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Diagram ◽  
Ion Irradiation ◽  
Structural Phase ◽  
Heavy Ion ◽  
Swift Heavy Ion Irradiation ◽  
Heavy Ion Irradiation ◽  
Swift Heavy Ion ◽  
Nanocrystalline Thin Films

scholarly journals Simulation of the temperature profile of BaCaZrTiO3 thin films during laser annealing

2020 ◽  
Vol 233 ◽  
pp. 05008
Author(s):  
Tiago Rebelo ◽  
João Alves ◽  
Bernardo Almeida
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Room Temperature ◽  
Laser Annealing ◽  
Laser Intensity ◽  
Structural Phase ◽  
Phase Changes ◽  
Heat Diffusion ◽  
Maximum Temperature ◽  
Heat Diffusion Equation

The laser annealing of a Ba0.85Ca0.15Ti0.9Zr0.1O3 (BCZT) thin film on a metglas substrate was simulated in order to understand how the annealing parameters (energy and fluence of the laser, pulse duration, etc) influence the optimization of the crystallinity of the film. Using a 1D heat diffusion equation combined with a finite difference method, the variation of the temperature with the depth relative to the film’s surface and on annealing time was studied. The laser intensity, BCZT’s reflectivity and the temperature dependence of the ther¬mal conductivity and specific heat of the BCZT were considered. No structural phase changes were detected in both the BCZT and the metglas for the values of laser fluence studied, but for 80 mJ/cm2 the maximum temperature approached near the BCZT’s melting temperature. It was observed that since the film’s ther¬mal conductivity decreases with increasing fluence, lower fluences allow for a better distribution of the laser’s energy throughout the crystal lattice, increasing the crystallinity. It was further observed that between consecutive pulses the film’s temperature stabilizes at room temperature.

scholarly journals The impact of fluence dependent 120 MeV Ag swift heavy ion irradiation on the changes in structural, electronic, and optical properties of AgInSe2 nano-crystalline thin films for optoelectronic applications

RSC Advances ◽  
2021 ◽  
Vol 11 (42) ◽  
pp. 26218-26227
Author(s):  
R. Panda ◽  
S. A. Khan ◽  
U. P. Singh ◽  
R. Naik ◽  
N. C. Mishra
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
Swift Heavy Ion Irradiation ◽  
Heavy Ion Irradiation ◽  
Swift Heavy Ion ◽  
Nano Crystalline ◽  
Shi Irradiation ◽  
The Impact

Swift heavy ion (SHI) irradiation in thin films significantly modifies the structure and related properties in a controlled manner.

scholarly journals Modulating the phase transition temperature of giant magnetocaloric thin films by ion irradiation

2017 ◽  
Vol 1 (6) ◽  
Author(s):  
S. Cervera ◽  
M. Trassinelli ◽  
M. Marangolo ◽  
C. Carrétéro ◽  
V. Garcia ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Ion Irradiation

Correlation between changes in nanoscale structural and optical properties upon swift heavy ion irradiation of SiNx thin films

2021 ◽  
Vol 129 (3) ◽  
pp. 035108
Author(s):  
Harsh Gupta ◽  
Ravi K. Bommali ◽  
Santanu Ghosh ◽  
Himanshu Srivastava ◽  
Arvind Srivastava ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
Structural And Optical Properties ◽  
Swift Heavy Ion Irradiation ◽  
Heavy Ion Irradiation ◽  
Swift Heavy Ion
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