GROWTH AND CHARACTERIZATION OF Hg1−xCdxTe ON CdTe SUBSTRATES, PREPARED BY ORGANOMETALLIC EPITAXY

1985 ◽  
Vol 56 ◽  
Author(s):  
I. B. Bhat ◽  
S. K. Ghandhi
Keyword(s):  
Temperature Range ◽  
Horizontal Reactor ◽  
P Type ◽  
Specular Surfaces ◽  
Organometallic Epitaxy

AbstractHgl−xCdxTe layers have been grown on CdTe substrates using dimethylcadmium, diethyltelluride and mercury in a horizontal reactor. Details of conditions for growth of these layers are presented in this paper. Specular surfaces of Hg1−x CdxTe with × ≥ 0.15 were obtained on (100) 3°, → (110) oriented CdTe substrates. Both n-type and p-type layers could be obtained. The mobility of these layers was measured over the temperature range of 10 K to 300 K. The mobility of n-type Hg.81 Cd.19Te layers, measured at 2.1 kG, was 3.0 × 105 cm2/V-sec at 60 K, falling to 2 × 105 cm2/V-sec at 10 K. P-type layers were also grown, and are described in this paper.

Mobility characterization of p-type and n-type strained sil-x-yGexcy/Si Epilayer hall devices

1998 ◽  
Vol 535 ◽  
Author(s):  
Jeff J. Petersoa ◽  
Charles E. Hunt ◽  
Stefan F. Zappe ◽  
Ernst Obeneier ◽  
Richard Westhoff ◽  
...  
Keyword(s):  
Doping Level ◽  
Doping Concentration ◽  
Impurity Scattering ◽  
Temperature Range ◽  
Boron Doped ◽  
Ionized Impurity Scattering ◽  
Van Der Pauw ◽  
P Type

AbstractMobilities in Si1-x-yGex Cy layers were measured using mesa etched Van der Pauw structures for alloy layers with 0 < x < 0.30 and 0 < y < 0.02 and doping levels of 1015 < N < 1018 cm-3. Mobilities in Si1-x-yGex Cy layers with x = 0.27 were found to approach Si mobilities for both μn and μp.While electron mobilities in phosphorous-doped SiGeC decrease with doping concentration, hole mobilities in boron-doped SiGeC increase with doping level, indicating ionized impurity scattering is not dominant for μp over the temperature range studied.

A p-Type PbS Quantum Dot Ink with Improved Stability for Solution Processable Optoelectronics

2021 ◽  
Author(s):  
Fiaz Ahmed ◽  
John Hardin Dunlap ◽  
Perry J. Pellechia ◽  
Andrew Greytak
Keyword(s):  
Quantum Dot ◽  
Ligand Exchange ◽  
Chemical Characterization ◽  
Single Step ◽  
Improved Stability ◽  
Solution Processable ◽  
P Type ◽  
Pbs Quantum Dot

A highly stable p-type PbS-QDs ink is prepared using a single-step biphasic ligand exchange route, overcoming instability encountered in previous reports. Chemical characterization of the ink reveals 3-mercaptopriopionic acid (MPA)...

scholarly journals Isolation and characterization of a new cold-active protease from psychrotrophic bacteria of Western Himalayan glacial soil

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Saleem Farooq ◽  
Ruqeya Nazir ◽  
Shabir Ahmad Ganai ◽  
Bashir Ahmad Ganai
Keyword(s):  
Specific Activity ◽  
Temperature Range ◽  
Psychrotrophic Bacteria ◽  
Isolation And Characterization ◽  
Cold Active ◽  
Active Protease ◽  
Quantitative Screening ◽  
First Time ◽  
Low K

AbstractAs an approach to the exploration of cold-active enzymes, in this study, we isolated a cold-active protease produced by psychrotrophic bacteria from glacial soils of Thajwas Glacier, Himalayas. The isolated strain BO1, identified as Bacillus pumilus, grew well within a temperature range of 4–30 °C. After its qualitative and quantitative screening, the cold-active protease (Apr-BO1) was purified. The Apr-BO1 had a molecular mass of 38 kDa and showed maximum (37.02 U/mg) specific activity at 20 °C, with casein as substrate. It was stable and active between the temperature range of 5–35 °C and pH 6.0–12.0, with an optimum temperature of 20 °C at pH 9.0. The Apr-BO1 had low Km value of 1.0 mg/ml and Vmax 10.0 µmol/ml/min. Moreover, it displayed better tolerance to organic solvents, surfactants, metal ions and reducing agents than most alkaline proteases. The results exhibited that it effectively removed the stains even in a cold wash and could be considered a decent detergent additive. Furthermore, through protein modelling, the structure of this protease was generated from template, subtilisin E of Bacillus subtilis (PDB ID: 3WHI), and different methods checked its quality. For the first time, this study reported the protein sequence for psychrotrophic Apr-BO1 and brought forth its novelty among other cold-active proteases.

Characterization of As-doped, p-type ZnO by x-ray absorption near-edge structure spectroscopy: Theory

2006 ◽  
Vol 89 (22) ◽  
pp. 222113 ◽  
Author(s):  
Sukit Limpijumnong ◽  
M. F. Smith ◽  
S. B. Zhang
Keyword(s):  
Edge Structure ◽  
X Ray ◽  
P Type ◽  
X Ray Absorption

OXYCHALCOGENIDES AS NEW EFFICIENT p-TYPE THERMOELECTRIC MATERIALS

2013 ◽  
Vol 06 (05) ◽  
pp. 1340007 ◽  
Author(s):  
CELINE BARRETEAU ◽  
LIN PAN ◽  
YAN-LING PEI ◽  
LI-DONG ZHAO ◽  
DAVID BERARDAN ◽  
...  
Keyword(s):  
Figure Of Merit ◽  
Parent Compound ◽  
Thermoelectric Figure ◽  
Medium Temperature ◽  
Temperature Range ◽  
The Past ◽  
Thermoelectric Conversion ◽  
New Directions ◽  
Wide Scale ◽  
P Type

During the past two years, we have underlined the great potential of p-type oxychalcogenides, with parent compound BiCuSeO , for thermoelectric applications in the medium temperature range (400–650°C). These materials, which do not contain lead and are less expensive than Te containing materials, exhibit large thermoelectric figure of merit, exceeding 1 in a wide temperature range, mainly due to an intrinsically very low thermal conductivity. This paper summarizes the main chemical and crystallographic features of this system, as well as the thermoelectric properties. It also gives new directions to improve these properties, and discuss the potential of these materials for wide scale applications in thermoelectric conversion system in the medium temperature range.

Magneto-Optical Characterization of the Nitrogen-Related Impurities in p-Type ZnSe Epilayers

2000 ◽  
Vol 180 (1) ◽  
pp. 195-199 ◽  
Author(s):  
L. Gravier ◽  
H. Makino ◽  
K. Arai ◽  
H. Sasaki ◽  
K. Kimura ◽  
...  
Keyword(s):  
Optical Characterization ◽  
Related Impurities ◽  
P Type
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