Point Defects in Gallium Arsenide Characterized by Positron Annihilation Spectroscopy and Deep Level Transient Spectroscopy

1994 ◽  
Vol 373 ◽  
Author(s):  
R. Mih ◽  
R. Gronsky
Keyword(s):  
Gallium Arsenide ◽  
Positron Annihilation ◽  
Deep Level Transient Spectroscopy ◽  
Deep Level ◽  
Czochralski Method ◽  
Positron Annihilation Spectroscopy ◽  
Crystallographic Data ◽  
Electrical Measurements ◽  
Vacancy Defects ◽  
Transient Spectroscopy

AbstractPositron annihilation lifetime spectroscopy (PALS) is a unique technique for detection of vacancy related defects in both as-grown and irradiated materials. We present a systematic study of vacancy defects in stoichiometrically controlled p-type Gallium Arsenide grown by the Hot- Wall Czochralski method. Microstructural information based on PALS, was correlated to crystallographic data and electrical measurements. Vacancies were detected and compared to electrical levels detected by deep level transient spectroscopy and stoichiometry based on crystallographic data.

Vacancies and deep levels in electron-irradiated 6HSiC epilayers studied by positron annihilation and deep level transient spectroscopy

2001 ◽  
Vol 90 (7) ◽  
pp. 3377-3382 ◽  
Author(s):  
A. Kawasuso ◽  
F. Redmann ◽  
R. Krause-Rehberg ◽  
T. Frank ◽  
M. Weidner ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Deep Level Transient Spectroscopy ◽  
Deep Level ◽  
Deep Levels ◽  
Transient Spectroscopy

Radiation-Induced Defects in 4H- and 6H-SiC Epilayers Studied by Positron Annihilation and Deep-Level Transient Spectroscopy

2002 ◽  
Vol 389-393 ◽  
pp. 489-492 ◽  
Author(s):  
Atsuo Kawasuso ◽  
Michael Weidner ◽  
F. Redmann ◽  
Thomas Frank ◽  
Reinhard Krause-Rehberg ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Deep Level Transient Spectroscopy ◽  
Deep Level ◽  
Radiation Induced ◽  
Transient Spectroscopy ◽  
Induced Defects

Electronic States of Grain Boundaries in Bicrystal Silicon

1982 ◽  
Vol 14 ◽  
Author(s):  
C. M. Shyu ◽  
L. J. Cheng ◽  
K. L. Wang
Keyword(s):  
Density Of States ◽  
Deep Level Transient Spectroscopy ◽  
Deep Level ◽  
Electronic States ◽  
Boundary Plane ◽  
Tilt Boundary ◽  
Electrical Measurements ◽  
Transient Spectroscopy ◽  
A Minor ◽  
P Type

ABSTRACTElectronic states at a 20° symmetrical(100) tilt boundary in p-type silicon were studied using deep level transient spectroscopy (DLTS) and other electrical measurements. The data can be explained with a model in which the local barrier height at the grain boundary varies on a scale much smaller than the boundary plane (∼I mm2) under study. Based on a relationship between the carrier capture cross section and energy level deduced from the experimental data, we have been able to calculate the distribution of the density of states in the energy bandgap at the boundary, which contains two groups of continuously distributed states; a major one whose density of states increases monotonically with the position of the state from the valance band, and a minor narrow one whose density of states is centered at Ev,+0.20 eV.

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