Investigation of localized Phase Changes using High Resolution Electron Back-Scatter Diffraction in Thin Film Cadmium Telluride Photovoltaic Material with High Lattice Defect Densities

2018 ◽  
Author(s):  
A Abbas ◽  
A. Munshi ◽  
K.L. Barth ◽  
W.S. Sampath ◽  
G.D West ◽  
...  
Keyword(s):  
Thin Film ◽  
High Resolution ◽  
Cadmium Telluride ◽  
Lattice Defect ◽  
Electron Back Scatter Diffraction ◽  
Phase Changes ◽  
Resolution Electron ◽  
Defect Densities ◽  
Photovoltaic Material

Study of the growth mechanism of highly in-plane aligned α-axis YBa2Cu3O7−x thin films on LaSrGaO4 substrate by high resolution electron microscopy

1996 ◽  
Vol 11 (12) ◽  
pp. 2951-2954 ◽  
Author(s):  
J. G. Wen ◽  
S. Mahajan ◽  
H. Ohtsuka ◽  
T. Morishita ◽  
N. Koshizuka
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Thin Films ◽  
High Resolution ◽  
High Resolution Electron Microscopy ◽  
Cross Sectional ◽  
Plan View ◽  
Oriented Film ◽  
Resolution Electron ◽  
Average Size

Highly in-plane aligned α-axis YBa2Cu3O7−x thin films deposited on (100) LaSrGaO4 substrates by a self-template method were studied by high-resolution electron microscopy along three orthogonal 〈100〉 axes of the substrate. Plan-view images confirm that the majority of the film preferentially aligns across the entire substrate except for very few misaligned domains with average size 10 nm2. Cross-sectional images along the [100] orientation of YBa2Cu3O7−x reveal that in-plane aligned α-axis YBa2Cu3O7−x is grown on a template layer dominated by c-axis oriented film. This strongly suggests that the in-plane alignment of α-axis YBa2Cu3O7−x thin films on (100) LaSrGaO4 substrates is governed by the different stresses along the b and c axes of the substrate. Cross-sectional images along [001] of the YBa2Cu3O7—x thin film reveal that the 90° domains easily nucleate in the region between α-axis YBa2Cu3O7—x and the YBa4Cu3Ox phase. Cracks along the (001) plane of YBa2Cu3O7−x are found to be due to the large mismatch between the c parameters of the thin film and substrate.

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