The exceptionally large height of the potential barrier at the grain boundary of a LaGaO3-based solid solution deduced from a linear diffusion model

2018 ◽  
Vol 20 (13) ◽  
pp. 8719-8723 ◽  
Author(s):  
Chih-Yuan S. Chang ◽  
Igor Lubomirsky ◽  
Sangtae Kim
Keyword(s):  
Solid Solution ◽  
Grain Boundary ◽  
Diffusion Model ◽  
Potential Barrier ◽  
Experimental Verification ◽  
Resistivity Ratio ◽  
Linear Diffusion ◽  
Boundary Potential

Experimental verification of consistency in the grain boundary potential heights deduced from the linear diffusion and the resistivity ratio methods.

On determining the height of the potential barrier at grain boundaries in ion-conducting oxides

2016 ◽  
Vol 18 (4) ◽  
pp. 3023-3031 ◽  
Author(s):  
Sangtae Kim ◽  
Seong K. Kim ◽  
Sergey Khodorov ◽  
Joachim Maier ◽  
Igor Lubomirsky
Keyword(s):  
Grain Boundary ◽  
Space Charge ◽  
Grain Boundaries ◽  
Potential Barrier ◽  
Boundary Resistance ◽  
Resistivity Ratio ◽  
Linear Diffusion ◽  
Conducting Oxides ◽  
Ion Conducting

Combining the linear diffusion and resistivity ratio models, one can distinguish the grain boundary resistance related to space charge from the resistance from other sources.

Applicability of a linear diffusion model to determination of the height of the potential barrier at the grain boundaries of Fe-doped SrTiO3

2018 ◽  
Vol 20 (28) ◽  
pp. 19250-19256 ◽  
Author(s):  
Chih-Yuan S. Chang ◽  
Igor Lubomirsky ◽  
Sangtae Kim
Keyword(s):  
Grain Boundaries ◽  
Diffusion Model ◽  
Potential Barrier ◽  
Experimental Verification ◽  
Electron Hole ◽  
Linear Diffusion

Experimental verification of a linear diffusion model on a lightly doped electron–hole conductor, Fe-doped SrTiO3.

scholarly journals Nanoscale control of grain boundary potential barrier, dopant density and filled trap state density for higher efficiency perovskite solar cells

InfoMat ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 409-423 ◽  
Author(s):  
Behzad Bahrami ◽  
Sally Mabrouk ◽  
Nirmal Adhikari ◽  
Hytham Elbohy ◽  
Ashim Gurung ◽  
...  
Keyword(s):  
Solar Cells ◽  
Grain Boundary ◽  
Potential Barrier ◽  
Perovskite Solar Cells ◽  
State Density ◽  
Trap State ◽  
Boundary Potential

The influence of Mn on the grain‐boundary potential barrier characteristics of donor‐doped BaTiO3ceramics

1990 ◽  
Vol 67 (4) ◽  
pp. 2088-2092 ◽  
Author(s):  
J. Illingsworth ◽  
H. M. Al‐Allak ◽  
A. W. Brinkman ◽  
J. Woods
Keyword(s):  
Grain Boundary ◽  
Potential Barrier ◽  
Boundary Potential

Effects of annealing on the grain boundary potential barrier of ZnO varistor

1986 ◽  
Vol 21 (10) ◽  
pp. 3491-3496 ◽  
Author(s):  
Eun Dong Kim ◽  
Myung Hwan Oh ◽  
Chong Hee Kim
Keyword(s):  
Grain Boundary ◽  
Potential Barrier ◽  
Zno Varistor ◽  
Boundary Potential

Direct Evidence for Grain Boundary Potential Barrier Breakdown via In Situ Electron Holography

1999 ◽  
Vol 5 (6) ◽  
pp. 428-436 ◽  
Author(s):  
Kevin D. Johnson ◽  
Vinayak P. Dravid
Keyword(s):  
Grain Boundary ◽  
Potential Barrier ◽  
Electron Holography ◽  
Static Case ◽  
Electrical Measurements ◽  
Applied Current ◽  
Boundary Potential ◽  
Resolution Electron ◽  
Grain Boundary Barrier

Abstract: Static and dynamic grain boundary potential barrier effects are directly observed at high spatial resolution for a varistor of model structure and chemistry. Grain boundary mechanisms for nonlinear electrical behavior are investigated for Nb-doped SrTiO3 bicrystals by in situ high-resolution electron holography under applied current coupled with electrical measurements. For the static case, holography reveals a positive grain boundary barrier of about 0.45 V, which is indicative of positive grain boundary charge adjoined by negative space charge regions. Under high applied current, in situ holography records the breakdown of this grain boundary barrier in accord with the macroscopic varistor effect, which is reflected in bulk I-V experiments.

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