Effect of Substrate Heating on the Optical Properties and Chemical Composition of Sputter Deposited BCN Thin Films

Magnesium hydroxide (Mg(OH)2) thin films were deposited by the drop-dry deposition (DDD) method using an aqueous solution containing Mg(NO3)2 and NaOH. DDD was performed by dropping the solution on a substrate, heating-drying, and rinsing in water. Effects of different deposition conditions on the surface morphology and optical properties of Mg(OH)2 thin films were researched. Films with a thickness of 1−2 μm were successfully deposited, and the Raman peaks of Mg(OH)2 were observed for them. Their transmittance in the visible range was 95% or more, and the bandgap was about 5.8 eV. It was found that the thin films have resistivity of the order of 105 Ωcm. Thus, the transparent and semiconducting Mg(OH)2 thin films were successfully prepared by DDD.

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Microstructure and Optical Properties of Co Sputter Deposited Si-Al Nanocomposite Thin Films

MRS Proceedings ◽

10.1557/proc-648-p3.47 ◽

2000 ◽

Vol 648 ◽

Author(s):

F. Niu ◽

P.J. Dobson ◽

B. Cantor

Keyword(s):

Thin Films ◽

Optical Properties ◽

Optical Absorption ◽

Absorption Peak ◽

Al Content ◽

Al Nanoparticles ◽

Transmission Electron ◽

Effective Medium Theories ◽

Nanocomposite Thin Films ◽

Sputter Deposited

AbstractNovel Si-Al nanocomposite thin films were made by radio frequency co-sputtering of Si and Al with Al content from 0 at.% to 69 at.%. Microstructure and optical properties of the films were characterised by conventional and high resolution transmission electron microscopyand spectrometry in the wavelength range from 200 to 3000 nm. The film microstructure consisted of Al nanoparticles (2-9 nm) embedded in an amorphous Si-Al matrix. Optical absorption spectra of the films up to 50 at.% Al exhibited a sharp absorption peak below500 nm and relatively low absorption above 500 nm. In addition, the absorption peak shifted towards longer wavelengths and the general absorption above 500 nm increased remarkably as Al content increased. For the Si-69at.%Al films, however, an absorption plateau appeared between 300 nm to 700 nm and a second weak and broad absorption peak appeared at around 900 nm. The results are analysed and compared with the optical absorption predicted by various effective medium theories.

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Optical Properties of Thin Films of Haycockite

MRS Advances ◽

10.1557/adv.2019.273 ◽

2019 ◽

Vol 4 (37) ◽

pp. 2023-2033

Author(s):

Barys Korzun ◽

Marin Rusu ◽

Thomas Dittrich ◽

Anatoly Galyas ◽

Andrey Gavrilenko

Keyword(s):

Thin Films ◽

Optical Properties ◽

Chemical Composition ◽

Energy Band ◽

Surface Photovoltage ◽

Second Phase ◽

Energy Band Gap ◽

Flash Evaporation ◽

Glass Substrates ◽

Evaporation Technique

ABSTRACTThin films of haycockite Cu4Fe5S8 on glass substrates were deposited by flash evaporation technique from powders of this compound. The composition of thin films correspond to the atomic content of Cu, Fe, and S of 24.13, 27.90, and 47.97 at.% with the Cu/ Fe and S/ (Cu + Fe) atomic ratios of 0.87 and 0.92 respectively, whereas the corresponding theoretical values for this material amount to 0.80 and 0.89. The as-prepared thin films of haycockite consist of a set of separate fractions of approximately identical areas of about 400 - 600 μm2. It can be assumed that this structure evolved during cooling down of thin films since it completely covers the surface of thin films. A small inclusion of a second phase with the chemical composition close to talnakhite Cu9Fe8S16 is also observed. Haycockite Cu4Fe5S8 is found to be a direct gap semiconductor with the energy band gap Eg equal to 1.26 eV as determined using both transmission and surface photovoltage methods.

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Magneto-optical properties of sputter-deposited NiMnSb thin films

Applied Physics Letters ◽

10.1063/1.120035 ◽

1997 ◽

Vol 71 (16) ◽

pp. 2382-2384 ◽

Cited By ~ 7

Author(s):

J. A. Caballero ◽

W. J. Geerts ◽

J. R. Childress ◽

F. Petroff ◽

P. Galtier ◽

...

Keyword(s):

Thin Films ◽

Optical Properties ◽

Sputter Deposited

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Determination of growth regimes of Pd nanostructures on c-plane sapphire by the control of deposition amount at different annealing temperatures

Physical Chemistry Chemical Physics ◽

10.1039/c7cp01410d ◽

2017 ◽

Vol 19 (23) ◽

pp. 15084-15097 ◽

Cited By ~ 10

Author(s):

Sundar Kunwar ◽

Mao Sui ◽

Puran Pandey ◽

Quanzhen Zhang ◽

Ming-Yu Li ◽

...

Keyword(s):

Thin Films ◽

Optical Properties ◽

Solid State ◽

Structural Evolution ◽

Pd Nanoparticles ◽

Annealing Temperatures ◽

Deposition Amount ◽

Sputter Deposited ◽

Different Thickness

Semi-spherical and irregular Pd nanoparticles and voids are fabricated on sapphire(0001) by the solid-state dewetting of sputter-deposited Pd thin films at different thickness and temperature. The structural evolution, surface morphology transformation and optical properties of Pd nanostructures are probed.

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