Optical Properties and Surface Morphologies of Silica–Gold Nanoshells Depending on Buffer Solutions and Reducing Agents

In this study, undoped and Sn-doped hematite (α-Fe2O3) nanostructures with variation of Sn (0.5, 1, 2, 3 at. %) were deposited on fluorine doped tin oxide (FTO) coated glass substrate using sonicated immersion method. The effect of Sn-dopant on structural and crystallinity properties were investigated by characterizing FESEM and XRD respectively, while the optical properties were measured by UV-Vis-NIR spectrometer. The surface morphologies from FESEM have shown that the hematite nanostructures were grown uniformly in all samples. However, as the dopant atomic percentage increases, the amount of hematite nanostructure being grown on the FTO decreases. Results demonstrated that the amount of Sn-doping was undoubtedly influence the structural, optical and electrical properties of hematite nanostructures.

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Characteristics of Al-Doped ZnO Transparent Conductive Oxide Films for Solar Cell Applications

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.124-126.131 ◽

2007 ◽

Vol 124-126 ◽

pp. 131-134

Author(s):

Doo Soo Kim ◽

Byeong Yun Oh ◽

Min Chang Jeong ◽

Jae Min Myoung

Keyword(s):

Optical Properties ◽

Solar Cells ◽

Surface Area ◽

Dye Sensitized Solar Cells ◽

Transparent Conductive Oxide ◽

Rf Magnetron Sputtering ◽

Transparent Electrode ◽

Dye Sensitized ◽

Doped Zno ◽

Surface Morphologies

Al-doped ZnO (ZnO:Al) films for transparent electrode applications in dye-sensitized solar cells and thin film solar cells were fabricated and characterized. In order to investigate the effect of crystallinity of the ZnO:Al films to the morphology and optical properties of the etched surface, the ZnO:Al films were deposited with varying substrate temperature by rf magnetron sputtering system and then films’ surface was etched in diluted hydrochloric acid (HCl) solution. Surface morphology of the amorphous ZnO:Al film deposited at room temperature was controllable to have large surface area, but it was not appropriate for transparent electrode layers due to high electrical resistivity. However, the resistivities of the ZnO:Al films deposited at the substrate temperatures of 150 and 300 oC were as low as 1.50×10-3 cm. In addition, the surface morphologies of the films deposited at 150 and 300 oC showed larger surface area for dye-sensitized cells and crater shape for light diffusion through the films, respectively. The surface morphologies and optical properties of the etched ZnO:Al films are attributed to the crystallinity of the as-fabricated films.

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Synthesis and Optical Properties of Annealed Cr Doped ZnS Nanoparticles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.678.163 ◽

2013 ◽

Vol 678 ◽

pp. 163-167 ◽

Cited By ~ 2

Author(s):

D. Amaranatha Reddy ◽

G. Murali ◽

N. Madhusudhana Rao ◽

R.P. Vijayalakshmi ◽

B.K. Reddy

Keyword(s):

Optical Properties ◽

Hexagonal Phase ◽

Blue Emission ◽

Precipitation Method ◽

Cubic Phase ◽

Structural And Optical Properties ◽

Zns Nanoparticles ◽

Blue Emission Peak ◽

Co Precipitation ◽

Surface Morphologies

Undoped and Cr doped ZnS nanoparticles with Cr concentrations of 3.0 at.% were prepared by a chemical co-precipitation method for the fist time, using 2-Mercaptoethanol as the capping agent and annealed the synthesized particles at 600°C for 3h in air. The effect of annealing on morphological, structural and optical properties of ZnS and ZnS:Cr have been studied and compared with as prepared samples. EDAX measurements confirmed the presence of Cr in the ZnS lattice and it also confirms the conversion of ZnS into ZnO after annealed at 600 0C/3h. Surface morphologies of all samples were characterized using scanning electron microscopy (SEM). XRD spectra of as synthesized nanoparticles of ZnS and ZnS:Cr exhibited cubic phase. After annealing, the cubic phase is transformed into hexagonal phase. The particle sizes of the ZnS:Cr powders were increased from 5 to 30 nm when the powders were annealed at 600°C. A stable blue emission peak at 445 nm is observed from the as prepared samples (pure ZnS and Cr doped ZnS) but annealed at 600 0C the PL peaked at 500 nm for pure ZnS and Cr doped ZnS nanoparticles exhibited PL peak at 500 nm as well as 654 nm. The emission intensity decreased in annealed particles compared to as synthesized samples.

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Effect of wettability on surface morphologies and optical properties of Ag thin films grown on glass and polymer substrates by thermal evaporation

Applied Surface Science ◽

10.1016/j.apsusc.2013.02.015 ◽

2013 ◽

Vol 273 ◽

pp. 215-219 ◽

Cited By ~ 16

Author(s):

Jing Lv

Keyword(s):

Thin Films ◽

Optical Properties ◽

Thermal Evaporation ◽

Polymer Substrates ◽

Surface Morphologies

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Physical Properties of Nanostructured CdO Films from Alkaline Baths Containing Saccharin as Additive

The Scientific World JOURNAL ◽

10.1155/2013/172052 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 18

Author(s):

Bünyamin Şahin

Keyword(s):

Raman Spectroscopy ◽

Optical Properties ◽

Cadmium Oxide ◽

X Ray Diffraction ◽

Silar Method ◽

Glass Substrates ◽

Layer Adsorption ◽

Surface Morphologies ◽

Alkaline Baths ◽

Cdo Films

Nanostructured cadmium oxide (CdO) films were fabricated on glass substrates from alkaline baths containing saccharin as an additive by a successive ionic layer adsorption and reaction (SILAR) method. The effects of saccharin concentration in the bath on the structural, morphological, and optical properties were studied by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), photoluminescence, and Raman spectroscopy. The analyses showed that the surface morphologies, XRD peak intensities, Raman spectroscopy, and photoluminescence properties of CdO films changed with saccharin concentration. From the results, it can be said that morphological characteristic and optical properties of the films could be calibrated by adding various saccharin percentages in the growth bath.

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