Defect Characterization Of InAs Wafers Using Positron Lifetime Spectroscopy

1996 ◽  
Vol 442 ◽  
Author(s):  
J. Mahony ◽  
P. Mascher
Keyword(s):  
Carrier Concentration ◽  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Positron Lifetime ◽  
Defect Characterization ◽  
Lifetime Measurements ◽  
Positron Lifetime Spectroscopy ◽  
Heavily Doped

AbstractPositron lifetime measurements on InAs wafers have shown that the positron bulk lifetime in InAs is 246±2 ps. Most samples exhibit a defect lifetime of 287±6 ps, which is attributable to monovacancy-impurity complexes with a concentration of 7±2×10 16 cm-3. Very heavily doped n-type samples exhibit a defect lifetime of 332–340 ps, characteristic of divacancies. The concentration of these defects is also close to 1017 cm−3. Both types of defects are stable for rapid thermal annealing up to 850 °C, and both defects are neutral. The formation of the divacancytype defects may be correlated with a discrepancy between the carrier concentration and the total

Defect Characterization of Multicycle Rapid Thermal Annealing Processed p-GaN for Vertical Power Devices

2019 ◽  
Vol 8 (2) ◽  
pp. P70-P76 ◽  
Author(s):  
Yekan Wang ◽  
Tingyu Bai ◽  
Chao Li ◽  
Marko J. Tadjer ◽  
Travis J. Anderson ◽  
...  
Keyword(s):  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Defect Characterization ◽  
Power Devices

Defect Characterization of CdTe Bulk Crystals Doped with Heavy Elements and Rare Earths

2005 ◽  
Vol 864 ◽  
Author(s):  
Svetlana Neretina ◽  
N.V. Sochinskii ◽  
Peter Mascher ◽  
E. Saucedo
Keyword(s):  
Positron Lifetime ◽  
Defect Characterization ◽  
Bulk Crystals ◽  
Rapid Thermal Anneal ◽  
Pump Probe ◽  
Carrier Lifetimes ◽  
Before And After ◽  
Positron Lifetime Spectroscopy ◽  
Co Doped

AbstractThe doping level in Cadmium Telluride (CdTe) is of the utmost importance for many applications. In this work, we have characterized CdTe crystals doped with Tl, Bi, or Yb as well as a crystal co-doped with Ge and Yb. The crystals were characterized using low-temperature Photoluminescence (PL), Positron Lifetime Spectroscopy (PLS), resistivity and a terahertz pump-probe technique that can determine carrier lifetimes. The properties of the crystals were also studied before and after a rapid thermal anneal (RTA) as well as after a longer conventional anneal. The results obtained using the various dopants vary widely. It will be shown, however, that the above mentioned dopants can form complexes with Cd vacancies (vacancy-impurity pairs). As a result, these Cd vacancies can play a key role in determining the resistivity and carrier lifetimes.

Characterization of Ge nanocrystals in a-SiO2 synthesized by rapid thermal annealing

1999 ◽  
Vol 144-145 ◽  
pp. 697-701 ◽  
Author(s):  
W.K Choi ◽  
S Kanakaraju ◽  
Z.X Shen ◽  
W.S Li
Keyword(s):  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Ge Nanocrystals

Characterization of the TiW‐GaAs interface after rapid thermal annealing

1989 ◽  
Vol 66 (10) ◽  
pp. 4775-4779 ◽  
Author(s):  
M. de Potter ◽  
W. De Raedt ◽  
M. Van Hove ◽  
G. Zou ◽  
H. Bender ◽  
...  
Keyword(s):  
Thermal Annealing ◽  
Rapid Thermal Annealing

Micro-Raman characterization of Ge diffusion and Si stress change in thin epitaxial Si1−xGex layers on Si(100) after rapid thermal annealing

2012 ◽  
Vol 27 (9) ◽  
pp. 1314-1323 ◽  
Author(s):  
Chun-Wei Chang ◽  
Min-Hao Hong ◽  
Wei-Fan Lee ◽  
Kuan-Ching Lee ◽  
Li-De Tseng ◽  
...  
Keyword(s):  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Stress Change ◽  
Image Position ◽  
Raman Characterization

Abstract

scholarly journals Effect of rapid thermal annealing on structural and optical properties of ZnS thin films fabricated by RF magnetron sputtering technique

2019 ◽  
Vol 14 (1) ◽  
pp. 53-63 ◽  
Author(s):  
M. S. Bashar ◽  
Rummana Matin ◽  
Munira Sultana ◽  
Ayesha Siddika ◽  
M. Rahaman ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Carrier Concentration ◽  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Annealing Temperature ◽  
Annealing Treatment ◽  
Localized States ◽  
Stoichiometric Ratio ◽  
Deposited Films

AbstractThe ZnS thin films have been deposited by radio frequency magnetron sputtering at room temperature. Post-deposition rapid thermal annealing treatment was done for the films deposited at different powers ranging from 70 to 100 W. One peak is observed for as-deposited and annealed thin films at around 28.48° corresponding to the (111) reflection plane indicating a zincblende structure. The overall intensity of the peaks and the FWHM values of as-deposited films increased after annealing corresponding to the increase in crystallinity. The optical energy bandgap is found in the range of 3.24–3.32 eV. With increasing annealing temperature, the decrease in the Urbach energy values indicating a decrease in localized states which is in good agreement with the XRD results where the crystallinity increased. The surface morphology of the films seems to be composed of Nano-granules with a compact arrangement. Apparently, the grain size increases in the deposited films as annealing temperature increases. The compositional ratio attained close to the stoichiometric ratio of 1:1 after annealing. From the Hall effect measurement, the carrier concentration and mobility are found to increase after annealing. The high carrier concentration and mobility also comply with structural and optical analysis. Best results are found for the film annealed at 400 °C deposited at 90 W.

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