Defect characterization and charge transport measurements in high-resolution Ni/n-4H-SiC Schottky barrier radiation detectors fabricated on 250 μm epitaxial layers

2021 ◽  
Vol 129 (24) ◽  
pp. 244501
Author(s):  
Joshua W. Kleppinger ◽  
Sandeep K. Chaudhuri ◽  
OmerFaruk Karadavut ◽  
Krishna C. Mandal
Keyword(s):  
High Resolution ◽  
Charge Transport ◽  
Schottky Barrier ◽  
Radiation Detectors ◽  
Epitaxial Layers ◽  
Defect Characterization ◽  
Transport Measurements

Fabrication of High-Resolution Nuclear Detectors Using 4H-SiC n-type Epitaxial Layers

2013 ◽  
Vol 1576 ◽  
Author(s):  
Kelvin J. Zavalla ◽  
Sandeep K. Chaudhuri ◽  
Krishna C. Mandal
Keyword(s):  
High Resolution ◽  
Schottky Barrier ◽  
Collection Efficiency ◽  
Noise Analysis ◽  
Alpha Particles ◽  
Epitaxial Layers ◽  
Total Charge ◽  
Electronic Noise ◽  
System Effect ◽  
Charge Collection Efficiency

ABSTRACTHigh resolution Schottky barrier detectors for alpha particles have been fabricated on 20 μm n-type 4H-SiC epitaxial layers. Schottky barrier contact structure was accomplished by deposition of 10 nm nickel on the Si face of the epilayers. The detectors were characterized for structural, electrical, and spectroscopic properties. Scanning electron microscopy and Nomarski optical microscopy revealed a micropipe density lower than 1 cm-2. The current-voltage (I-V) characteristics of the device exhibited very low leakage current of the order of 6.5 pA at an operating bias of 90 V. C-V measurements revealed a typical effective doping concentrations of 2.4 × 1014 cm-3 in these epilayers. The detectors were evaluated for alpha particles detection using a 241Am source. An energy resolution of ∼0.98% for 5.48 MeV alpha particles was observed. The separate contribution of charge carrier drift and diffusion to the total charge collection efficiency has been calculated in these detectors following a drift-diffusion model. Detailed electronic noise analysis in terms of equivalent noise charge (ENC) was carried out to study the effect of various noise components that contribute to the total electronic noise in the detection system. Effect of shaping time, presence of source and bias on the ENC has been studied in details.

Charge Transport and Space-Charge Formation in Cd1−xZnxTe1−ySey Radiation Detectors

2021 ◽  
Vol 15 (5) ◽  
Author(s):  
J. Pipek ◽  
M. Betušiak ◽  
E. Belas ◽  
R. Grill ◽  
P. Praus ◽  
...  
Keyword(s):  
Space Charge ◽  
Charge Transport ◽  
Radiation Detectors ◽  
Charge Formation

Single-Molecule Charge-Transport Measurements that Reveal Technique-Dependent Perturbations

2006 ◽  
Vol 128 (34) ◽  
pp. 11260-11267 ◽  
Author(s):  
Dwight S. Seferos ◽  
Amy Szuchmacher Blum ◽  
James G. Kushmerick ◽  
Guillermo C. Bazan
Keyword(s):  
Charge Transport ◽  
Single Molecule ◽  
Transport Measurements

High resolution X-ray diffraction studies of CdxHg1-xTe/CdTe epitaxial layers grown by MOVPE on GaAs substrates

1990 ◽  
Vol 101 (1-4) ◽  
pp. 572-578 ◽  
Author(s):  
A.M. Keir ◽  
A. Graham ◽  
S.J. Barnett ◽  
J. Giess ◽  
M.G. Astles ◽  
...  
Keyword(s):  
High Resolution ◽  
Epitaxial Layers ◽  
X Ray Diffraction ◽  
X Ray ◽  
Gaas Substrates

scholarly journals Enhanced Charge Transport in 2D materials through Polaritonic States

2021 ◽  
Author(s):  
Pooja Bhatt ◽  
kuljeet Kaur ◽  
Jino George
Keyword(s):  
Charge Transport ◽  
Schottky Barrier ◽  
Effective Mass ◽  
Schottky Barrier Height ◽  
Resonance Condition ◽  
2D Materials ◽  
Clear Correlation ◽  
Matter Interaction ◽  
Light Matter Interaction ◽  
Transport Mobility

Here, we observed enhancement of charge transport in 2D materials by light-matter strong coupling. Charge transport mobility is enhanced by 50 times under ON resonance condition. A clear correlation in the effective mass of the polaritonic state and Schottky barrier height may be indicating a coherent nature of light-matter interaction.<br>

Charge Transport in Cu2S Nanocrystals Arrays: Effects of Crystallite Size and Ligand Length

2015 ◽  
Vol 229 (1-2) ◽  
Author(s):  
Yehonadav Bekenstein ◽  
Orian Elimelech ◽  
Kathy Vinokurov ◽  
Oded Millo ◽  
Uri Banin
Keyword(s):  
Charge Transport ◽  
Crystallite Size ◽  
Quantum Confinement ◽  
Confinement Effects ◽  
Transport Measurements ◽  
Quantum Confinement Effects

AbstractQuantum confinement effects are observed in transport measurements of Cu

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