Some properties of amorphous hydrogenated silicon nitride prepared by ion-beam-assisted deposition

1991 ◽  
Vol 69 (5) ◽  
pp. 553-557 ◽  
Author(s):  
P. Wilson ◽  
D. C. Craigen ◽  
D. E. Brodie

Thin films of a-SiNx:H were deposited using the ion-beam-assisted deposition technique. Silicon was evaporated from a resistively heated carbon crucible while the substrate was bombarded with low-energy ions (100 eV). The feed gas used for the ion source was primarily ammonia (NH3), but a 90% nitrogen, 10% hydrogen mixture was also tried. The nitrogen–hydrogen mixture resulted in nonhydrogenated films. Both the absence of absorption in the IR spectrum owing to oxygen, and the increase in slope of the Tauc plots are evidence of an improvement in film morphology owing to the ion bombardment. The wide band-gap films photoconduct when exposed to UV light. The photoconducting property is lost when the films are exposed to air, and is restored when the samples are thermally annealed in a vacuum.

2012 ◽  
Vol 571 ◽  
pp. 120-124
Author(s):  
Liang Min Zhang

Hybrid photovoltaic concepts based on a nanoscale combination of organic and inorganic semiconductors are promising way to enhance the cost efficiency of solar cells through a better use of the solar spectrum, a higher ratio of interface-to-volume, and the flexible processability of polymers. In this work, two types of thin film solar cells have been developed. In both types of solar cells, poly-N-vinylcarbazole (PVK) is used as electron donor, cadmium sulfide (CdS) and titanium dioxide (TiO2) nanocrystals are used as electron acceptors, respectively. Since TiO2 has a wide band gap and can only absorb UV light, in the second type of solar cell, ruthenium dye is used as photo-sensitizer. The preliminary results of photoconductive and photovoltaic characteristics of these two inorganic-organic composites are presented.


1995 ◽  
Vol 396 ◽  
Author(s):  
Igor V. Svadkovsk ◽  
Anatoly P. Dostanko

AbstractTwo types of the ion sources for ion beam assisted deposition using inert gases, oxygen or nitrogen are reported. Their design and operational features are presented. Each of them has the properties of two existing main types of the gridless Hall sources: an end-Hall source and the anode-layer version a closed-drift ion source. Basic distinction of the developed sources is the extended range of ion energies in high-current beam for optimization of deposition, cleaning and etching processes.


2021 ◽  
Vol 58 (1) ◽  
pp. 3-14
Author(s):  
J. Cipa ◽  
L. Trinkler ◽  
B. Berzina

AbstractAlN is a wide band gap material with promising properties for dosimetric applications, especially in UV dosimetry. In the present research, the thermoluminescence method is used in order to better understand sunlight and X-ray irradiation effects on yttria doped AlN ceramics. In general, the TL response is characterised by a broad TL peak with maxima around 400–450 K and a TL emission spectrum with UV (400 nm), Blue (480 nm) and Red (600 nm) bands. Compared to the X-ray irradiation, sunlight irradiation creates a wider TL glow curve peak with a maximum shifted to higher temperatures by 50 K.Furthermore, in the TL emission spectra of AlN irradiated with sunlight the UV band is suppressed. The reasons of the TL peculiarities under two types of irradiation are discussed. Practical application of AlN ceramics as material for UV light TL dosimetry and, in particular, for sunlight dosimetry is estimated.


1991 ◽  
Vol 127 (1) ◽  
pp. K19-K23 ◽  
Author(s):  
R. Hübler ◽  
W. H. Schreiner ◽  
I. J. R. Baumvol

2021 ◽  
Vol 2064 (1) ◽  
pp. 012054
Author(s):  
V V Poplavsky ◽  
A V Dorozhko ◽  
V G Matys

Abstract This paper presents a brief overview of our studies on the modification of materials using ion beam assisted deposition (IBAD) of metals from vacuum arc discharge plasma in order to form catalytically active and corrosion-resistant layers on the surface. Deposition of metals on different materials with simultaneous mixing of the deposited layer with the substrate surface by accelerated ions of the deposited metal was carried out in an experimental setup with a pulsed electric arc ion source. Catalytic and corrosion properties of the materials with the obtained layers were studied using electrochemical voltammetric measurements. The microstructure and composition of the resulting layers were studied using the SEM, EDX, WD-XRF, XPS, EBSD, and RBS methods.


Author(s):  
Yoshio Matsubara ◽  
Koji Miyake ◽  
Hideaki Tahara ◽  
Shuichi Nogawa ◽  
Junzo Ishikawa

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