p-Type GaN Obtained by Electron Beam Irradiation

1997 ◽  
pp. 79-91
Author(s):  
Shuji Nakamura ◽  
Gerhard Fasol
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
P Type

scholarly journals Thermoelectric Performance of Polypropylene/Carbon Nanotube/Ionic Liquid Composites and Its Dependence on Electron Beam Irradiation

2022 ◽  
Vol 6 (1) ◽  
pp. 25
Author(s):  
Oliver Voigt ◽  
Beate Krause ◽  
Petra Pötschke ◽  
Michael T. Müller ◽  
Sven Wießner
Keyword(s):  
Electron Beam ◽  
Seebeck Coefficient ◽  
Electron Beam Irradiation ◽  
Single Walled Carbon Nanotubes ◽  
Electron Beam Treatment ◽  
Beam Irradiation ◽  
Seebeck Coefficients ◽  
Treated Sample ◽  
P Type ◽  
Walled Carbon Nanotubes

The thermoelectric behavior of polypropylene (PP) based nanocomposites containing single walled carbon nanotubes (SWCNTs) and five kinds of ionic liquids (Ils) dependent on composite composition and electron beam irradiation (EB) was studied. Therefore, several samples were melt-mixed in a micro compounder, while five Ils with sufficiently different anions and/or cations were incorporated into the PP/SWCNT composites followed by an EB treatment for selected composites. Extensive investigations were carried out considering the electrical, thermal, mechanical, rheological, morphological and, most significantly, thermoelectric properties. It was found that it is possible to prepare n-type melt-mixed polymer composites from p-type commercial SWCNTs with relatively high Seebeck coefficients when adding four of the selected Ils. The highest Seebeck coefficients achieved in this study were +49.3 µV/K (PP/2 wt.% SWCNT) for p-type composites and −27.6 µV/K (PP/2 wt.% SWCNT/4 wt.% IL type AMIM Cl) for n-type composites. Generally, the type of IL is decisive whether p- or n-type thermoelectric behavior is achieved. After IL addition higher volume conductivity could be reached. Electron beam treatment of PP/SWCNT leads to increased values of the Seebeck coefficient, whereas the EB treated sample with IL (AMIM Cl) shows a less negative Seebeck coefficient value.

Studies of the Effects of Ion-Implantation and Electron Beam Irradiation on CuInSe2 Single Crystals

1992 ◽  
Vol 262 ◽  
Author(s):  
C. A. Mullan ◽  
C. J. Kiely ◽  
A. Rockett ◽  
M. Imanieh ◽  
M. V. Yakushev ◽  
...  
Keyword(s):  
Electron Beam ◽  
Single Crystals ◽  
Electron Beam Irradiation ◽  
High Dose ◽  
Beam Irradiation ◽  
Thin Foils ◽  
Microstructural Effects ◽  
Vertical Bridgman ◽  
Electron Microscopes ◽  
P Type

ABSTRACTA series of CuInSe2 single crystals which were grown by the vertical Bridgman technique have been implanted with oxygen and xenon ions. These implants tend to cause a change from n to p-type conductivity and an enhancement of the photoconductivity. We present HREM and SIMS characterisation of the microstructural effects caused by high dose ion implants on CuInSe2. We also correlate our data with calculated ion implant profiles. In addition, we show that CuInSe2 thin foils can undergo significant degradation under the electron beam irradiation conditions which are commonly encountered in electron microscopes.

P-Type Conduction in Mg-Doped GaN Treated with Low-Energy Electron Beam Irradiation (LEEBI)

1989 ◽  
Vol 28 (Part 2, No. 12) ◽  
pp. L2112-L2114 ◽  
Author(s):  
Hiroshi Amano ◽  
Masahiro Kito ◽  
Kazumasa Hiramatsu ◽  
Isamu Akasaki
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Low Energy ◽  
Energy Electron ◽  
Beam Irradiation ◽  
Low Energy Electron ◽  
P Type ◽  
Type Conduction ◽  
Mg Doped

Converting the Conducting Behavior of Graphene Oxides from n-Type to p-Type via Electron-Beam Irradiation

2018 ◽  
Vol 10 (8) ◽  
pp. 7324-7333 ◽  
Author(s):  
Ali Mirzaei ◽  
Yong Jung Kwon ◽  
Ping Wu ◽  
Sang Sub Kim ◽  
Hyoun Woo Kim
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
Graphene Oxides ◽  
P Type
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