Dislocation-related conductivity in Au(In)/Cd1–xZnxTe(x = 0, 0.1) Schottky contacts

2021 ◽  
Vol 96 (2) ◽  
pp. 20101
Author(s):  
Andriy Tkachuk ◽  
Volodymyr Tetyorkin ◽  
Andriy Sukach
Keyword(s):  
Surface Layer ◽  
Surface Modification ◽  
Ruby Laser ◽  
Schottky Contacts ◽  
Applied Bias ◽  
Potential Barriers ◽  
Conductivity Type ◽  
Modified Surface ◽  
Dc Current ◽  
Modified Surface Layer

Dislocation-related conductivity is studied in Schottky contacts Au(In)/Cd1-xZnxTe (x = 0, 0.1) prepared on the surface of single crystals modified by multiple irradiation with a ruby laser and mechanical polishing. The contacts were examined by measuring the DC current as a function of the applied bias and temperature as well as the photoelectric response. It is shown that both methods of surface modification result in p-to-n conversion of the conductivity type of the surface layer. The charge transfer in contacts is explained by the formation of dislocation networks buried under the surface. A model of two potential barriers is proposed for the interpretation of the photovoltaic response in contacts. Their existence is associated with compressive strains in the modified surface layer caused by dislocations, which leads to an increase in the band gap and the formation of a heterostructure.

Structural Aspects of Zr+ Ion-Beam Surface Modification and Mechanical Properties of 12CrMoV Steel

2015 ◽  
Vol 770 ◽  
pp. 81-86 ◽  
Author(s):  
Iliya Vlasov ◽  
Sergey V. Panin ◽  
Viktor Sergeev ◽  
Vladimir Titkov ◽  
Pavlo Maruschak
Keyword(s):  
Mechanical Properties ◽  
Surface Layer ◽  
Surface Modification ◽  
Bulk Material ◽  
Ion Beam ◽  
Beam Surface ◽  
Modified Surface ◽  
12Crmov Steel ◽  
Structural Aspects ◽  
Modified Surface Layer

Surface modification is an effective way both to protect structural materials and to improve their mechanical properties. However under mechanical loading the distinction of elastic moduli of a modified surface layer and adjacent bulk material causes the stress concentrators to occur, whose relaxation may give rise to localized development of plastic deformation or fracture [1]. Under cyclic loading such distinction of the properties brings to multiple microcracking of strengthened surface layer, to act as structural micronotches [2, 3]. Therefore, optimized modes and parameters for surface layer modification are to be determined being a certain compromise between strength/ductility of the layer and its thickness etc.

Efficiency enhancement of Cu 2 ZnSn(S,Se) 4 solar cells by S-modified surface layer

2017 ◽  
Vol 162 ◽  
pp. 21-29 ◽  
Author(s):  
Chung-Hao Cai ◽  
Shih-Yuan Wei ◽  
Wei-Chih Huang ◽  
Chia-Hao Hsu ◽  
Wei-Hao Ho ◽  
...  
Keyword(s):  
Surface Layer ◽  
Solar Cells ◽  
Efficiency Enhancement ◽  
Modified Surface ◽  
Modified Surface Layer

scholarly journals Efficient hard X-ray source using femtosecond plasma at solid targets with a modified surface

2004 ◽  
Vol 22 (3) ◽  
pp. 301-306 ◽  
Author(s):  
S.A. GAVRILOV ◽  
D.M. GOLISHNIKOV ◽  
V.M. GORDIENKO ◽  
A.B. SAVEL'EV ◽  
R.V. VOLKOV
Keyword(s):  
Experimental Data ◽  
Surface Layer ◽  
Laser Pulses ◽  
Hot Electron ◽  
High Contrast ◽  
X Ray ◽  
Corrugated Surface ◽  
Fs Laser ◽  
Modified Surface ◽  
Modified Surface Layer

Recent results on constructing of an efficient hard X-ray source using solid targets irradiated by high-contrast 200-fs laser pulses with an intensity above 1016W/cm2are presented. We used different solid targets with a laser- and electrochemically modified surface layer: craters, pyramidal cavities, porous silicon, gratings. Experimental data obtained confirms that using solid targets with a corrugated surface one can achieve a prominent increase both in the efficiency of hard X-ray generation (in the quanta range 2–30 keV) and in the hot electron temperature of plasma.

Transient Electrochemical Measurements During Copper Chemical Mechanical Polishing

2003 ◽  
Vol 767 ◽  
Author(s):  
Seung-Mahn Lee ◽  
Wonseop Choi ◽  
Valentin Craciun ◽  
Rajiv K. Singh
Keyword(s):  
Surface Layer ◽  
Reaction Kinetics ◽  
Chemical Mechanical Polishing ◽  
Copper Surface ◽  
Mechanical Polishing ◽  
Electrochemical Measurements ◽  
Chemically Modified ◽  
Modified Surface ◽  
Selection Of ◽  
Modified Surface Layer

AbstractChronoamperometry was used to investigate the reaction/passivation kinetics and thickness of the chemically modified surface layer on the copper during chemical mechanical polishing (CMP). The result showed that the reaction/passivation kinetics and the thickness of the chemically modified surface layer are strongly dependent on the chemistry of CMP slurry in the chemical aspect of CMP and play critical keys in the selection of the chemistry and its concentration. BTA and H2O2 enhanced the passivation kinetics, resulting in thinner layer on the copper surface. In addition, the reaction kinetics increased as pH decreased.

Corrosion Characteristics of Surface-Modified DET Magnesium Powders

2004 ◽  
Vol 449-452 ◽  
pp. 369-372
Author(s):  
W.S. Chung ◽  
W.Y. Yoon ◽  
Kwang Jin Kim
Keyword(s):  
Corrosion Resistance ◽  
Surface Layer ◽  
Current Density ◽  
Nacl Solution ◽  
Composition Distribution ◽  
Passive Behavior ◽  
Modified Surfaces ◽  
Modified Surface ◽  
Surface Modified ◽  
Modified Surface Layer

Magnesium powders having inactive surface layer have been processed easily and intentionally by DET under fluoride, chromate, and bromide salt. The modified surfaces play an important role in preventing contact with active environments to improve corrosion resistance of Magnesium powders; the image of the surface modified powders was observed using SEM. The composition distribution and characteristics was determined and analyzed by using XRD, XPS, and EIS. Compared with bare Magnesium, the Magnesium having chromate modified surface layer showed a more passive behavior such as smaller current density and nobler potential in 4wt% NaCl solution.

scholarly journals Evaluation of Properties of the Laser Modified Surface Layer

1999 ◽  
Vol 96 (2) ◽  
pp. 263-273
Author(s):  
A. Bień ◽  
W. Szachnowski
Keyword(s):  
Surface Layer ◽  
Modified Surface ◽  
Modified Surface Layer

scholarly journals Исследование изменения микротвердости поверхности циркония после лазерной модифицирующей обработки

2019 ◽  
Vol 45 (6) ◽  
pp. 20 ◽  
Author(s):  
В.И. Проскуряков ◽  
И.В. Родионов ◽  
В.А. Кошуро
Keyword(s):  
Surface Layer ◽  
Laser Action ◽  
Pulsed Laser ◽  
Hardened Layer ◽  
Bulk Metal ◽  
Transition Zones ◽  
Zirconium Oxides ◽  
E110 Alloy ◽  
Modified Surface ◽  
Modified Surface Layer

AbstractThe results of an investigation of the process of laser-induced hardening of zirconium (E110 alloy) are reported. It has been established that the laser treatment in air results in the formation of a uniformly distributed microrelief characterized by the presence of microparticles with various configurations. Overlap of the laser beam trajectories leads to the formation of a layered structure. The composition of laser-modified surface depends on the regime of processing and mostly comprises a mixture of zirconium oxides and nitrides. In addition, the formation of diffuse transition zones between the bulk metal and modified surface layer is established. The dependence of the thickness of the hardened layer on the regime of pulsed laser action is determined.

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