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

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

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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