Suppressing the incorporation of carbon impurity in AlGaN:Mg for green LDs with low operation voltage (Conference Presentation)

2017 ◽  
Author(s):  
Jianping Liu
Keyword(s):  
Carbon Impurity

scholarly journals Magnetism and Local Distortions near Carbon Impurity inγ-Iron

2007 ◽  
Vol 99 (24) ◽  
Author(s):  
D. W. Boukhvalov ◽  
Yu. N. Gornostyrev ◽  
M. I. Katsnelson ◽  
A. I. Lichtenstein
Keyword(s):  
Carbon Impurity ◽  
Local Distortions

scholarly journals High pressure synthesis of BN and BCN crystals and their functionalization

2014 ◽  
Vol 70 (a1) ◽  
pp. C751-C751
Author(s):  
Takashi Taniguchi
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Purity ◽  
Chemical Vapour ◽  
Attractive Potential ◽  
Luminescence Spectra ◽  
Hard Material ◽  
High Temperature Annealing ◽  
Electrical Insulator ◽  
Carbon Impurity

Hexagonal BN (hBN) and cubic BN (cBN) are known as the representative crystal structures of BN. The former is chemically and thermally stable, and has been widely used as an electrical insulator and heat-resistant materials. The latter, which is a high-density phase, is an ultra-hard material second only to diamond. Recently, some progresses in the synthesis of high purity BN crystals were achieved by using Ba-BN as a solvent material at high pressure crystal growth [1]. Band-edge natures (cBN Eg=6.2eV and hBN Eg=6eV) were characterized by their optical properties. The key issue to obtain high purity crystals is to reduce oxygen and carbon contamination in the growth circumstances. It should be emphasized that hBN exhibits attractive potential for deep ultraviolet (DUV) light emitter [2 ] and also superior properties as substrate of graphene devices [3]. In this study, the effect of carbon impurity in BN is investigated. Three types of experimental approaches were carried out; (1) synthesis of high purity hBN single crystals and its characterization with respect to residual carbon, (2) high temperature solid state diffusion of carbon into hBN and its characterization, and (3) high temperature annealing of turbostratic B-C-N(t-BCN) compound under high pressure. t-BCN flakes obtained by chemical vapour deposition process was annealed near 3000C and 2GPa so as to become well crystallized.At annealing near 3000C at 2GPa with graphite, carbon incorporation of 1E21/cm3 in hBN was achieved with exhibiting totally different Cathode Luminescence spectra feature with high purity hBN crystals. Since major carbon contribution may affect the crystal structure of the 2-D layers stacking in hBN system, phase stability of BCN ternary phase will be introduced by the experimental results of high temperature annealing. Furthermore, effect of carbon impurity upon the synthesis of wurtzite BN from highly crystalline hBN via martensitic phase transformation will also be introduced.

scholarly journals Contribution of Stark-Doppler broadening of carbon impurity lines to the analysis of tokamak divertor plasmas

2012 ◽  
Vol 397 ◽  
pp. 012025
Author(s):  
M Koubiti ◽  
T Nakano ◽  
Y Marandet ◽  
L Mouret ◽  
J Rosato ◽  
...  
Keyword(s):  
Doppler Broadening ◽  
Carbon Impurity

Effects of Carbon Impurity on Microstructural Evolution in Irradiated α-Iron

2012 ◽  
Vol 62 (1) ◽  
pp. 139-144 ◽  
Author(s):  
Yosuke Abe ◽  
Tomoaki Suzudo ◽  
Shiro Jitsukawa ◽  
Tomohito Tsuru ◽  
Takashi Tsukada
Keyword(s):  
Microstructural Evolution ◽  
Carbon Impurity

scholarly journals Resistivity reduction of low temperature grown p-Al0.09Ga0.91N by suppressing the incorporation of carbon impurity

AIP Advances ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 085005 ◽  
Author(s):  
F. Liang ◽  
Jing Yang ◽  
D. G. Zhao ◽  
D. S. Jiang ◽  
Z. S. Liu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Carbon Impurity

Hybrid Ligand Exchange of Cu(In,Ga)S2 Nanoparticles for Carbon Impurity Removal in Solution-Processed Photovoltaics

2020 ◽  
Vol 32 (12) ◽  
pp. 5091-5103 ◽  
Author(s):  
Ryan G. Ellis ◽  
Jonathan W. Turnley ◽  
David J. Rokke ◽  
Jacob P. Fields ◽  
Essam H. Alruqobah ◽  
...  
Keyword(s):  
Ligand Exchange ◽  
Solution Processed ◽  
Carbon Impurity ◽  
Impurity Removal
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