Spectroscopic Ellipsometry Investigation of Au‐Assisted Exfoliated Large Area Single‐Crystalline Monolayer MoS 2

AbstractThis work refers to a study performed on polymorphous silicon (pm-Si:H) at excitation frequencies of 13.56 and 27.12 MHz in a large area PECVD reactor. The plasma was characterised by impedance probe measurements, aiming to identify the plasma conditions that lead to produce pm-Si:H films. The films produced were characterised by spectroscopic ellipsometry, infrared and Raman spectroscopy and hydrogen exodiffusion experiments, which are techniques that permit the structural characterisation of the pm-Si films and to study the possible differences between the films deposited at 13.56 and 27.12 MHz. Conductivity measurements were also performed to determine the transport properties of the films produced. The set of data obtained show that the 27.12 MHz pm-Si:H can be grown at higher rates with less hydrogen dilution and power density, being the resulting films denser, chemically more stable and with improved performances than the pm-Si:H films grown at 13.56 MHz.

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Meyer-Rod Coated 2D Single-Crystalline Copper Nanoplate Film with Intensive Pulsed Light for Flexible Electrode

Coatings ◽

10.3390/coatings10010088 ◽

2020 ◽

Vol 10 (1) ◽

pp. 88

Author(s):

Myeongjong Go ◽

Asrar Alam ◽

Ho Kwang Choie ◽

Zhaoyang Zhong ◽

Keun Hyung Lee ◽

...

Keyword(s):

Systematic Study ◽

Large Scale ◽

Coating Process ◽

Pulsed Light ◽

Large Area ◽

Flexible Electrode ◽

Conductive Coatings ◽

Single Crystalline ◽

Rheological Behaviors ◽

Industrial Coating

Copper is widely used because it is inexpensive, abundant, and highly conductive. However, most copper used in industrial coating processes is in the form of circular powder, which is problematic for large area, high conductive coatings. In this work, 2D single-crystalline Cu nanoplates (Cu NPLs) were synthesized and a systematic study on coating with large-scale Cu NPLs using a Meyer-rod coating process was performed. The rheological behaviors of the Cu solution with various concentrations, surface tensions, and speeds were analyzed using Ca and Re numbers to optimize coating conditions. In addition, the effect of intensive pulse light (IPL) to sinter the coper film within a 1 s timeframe was also investigated in order to be able to produce an electrode in the shortest possible time which is applicable to industry. Finally, the Meyer-rod coated electrode was utilized in an electrochemical luminescence (ECL) device.

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High speed spectroscopic ellipsometry technique for on-line monitoring in large area thin layer production

2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC) ◽

10.1109/pvsc.2015.7355640 ◽

2015 ◽

Author(s):

C. Major ◽

G. Juhasz ◽

Z. Labadi ◽

M. Fried

Keyword(s):

Thin Layer ◽

Spectroscopic Ellipsometry ◽

High Speed ◽

Large Area ◽

On Line

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Porous and Nanoporous Semiconductors and Emerging Applications

MRS Proceedings ◽

10.1557/proc-876-r12.1 ◽

2005 ◽

Vol 876 ◽

Author(s):

Helmut Föll ◽

Jürgen Carstensen ◽

Stefan Frey

Keyword(s):

Optical Properties ◽

Fuel Cells ◽

Pore Formation ◽

Large Area ◽

Paper Briefly ◽

High Explosives ◽

Single Crystalline ◽

Natural Materials ◽

Porous Semiconductors ◽

Wide Range

AbstractPores in single crystalline semiconductors can be produced in a wide range of geometries and morphologies, including the “nano” regime. Porous semiconductors may have properties completely different from the bulk, and metamaterials with e.g. optical properties not encountered in natural materials are emerging. Possible applications of porous semiconductors include various novel sensors, but also more “exotic” uses as, e.g. high explosives or electrodes for micro fuel cells. The paper briefly reviews pore formation (including more applied aspects of large area etching), properties of porous semiconductors and emerging applications.

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