scholarly journals Optical, Electrical and Photocatalytic Properties of the Ternary SemiconductorsZnxCd1-xS,CuxCd1-xSandCuxZn1-xS

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Sandra Andrea Mayén-Hernández ◽  
David Santos-Cruz ◽  
Francisco de Moure-Flores ◽  
Sergio Alfonso Pérez-García ◽  
Liliana Licea-Jiménez ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Photocatalytic Properties ◽  
Energy Band Gap ◽  
Amorphous Thin Films ◽  
Semiconductor Thin Films ◽  
Different Temperatures ◽  
Blue Solution ◽  
Ternary Semiconductor ◽  
Van Der Pauw

The effects of vacuum annealing at different temperatures on the optical, electrical and photocatalytic properties of polycrystalline and amorphous thin films of the ternary semiconductor alloysZnxCd1-xS,CuxCd1-xSandCuxZn1-xSwere investigated in stacks of binary semiconductors obtained by chemical bath deposition. The electrical properties were measured at room temperature using a four-contact probe in the Van der Pauw configuration. The energy band gap of the films varied from 2.30 to 2.85 eV. The photocatalytic activity of the semiconductor thin films was evaluated by the degradation of an aqueous methylene blue solution. The thin film ofZnxCd1-xSannealed under vacuum at 300°C exhibited the highest photocatalytic activity.

scholarly journals Optical and Electrical Properties of Thin Films of CuS Nanodisks Ensembles Annealed in a Vacuum and Their Photocatalytic Activity

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
J. Santos Cruz ◽  
S. A. Mayén Hernández ◽  
F. Paraguay Delgado ◽  
O. Zelaya Angel ◽  
R. Castanedo Pérez ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Hydrogen Peroxide ◽  
Photocatalytic Activity ◽  
Electrical Properties ◽  
Absolute Temperature ◽  
Glass Substrates ◽  
Transmission Electron ◽  
Different Temperatures ◽  
Blue Solution

Effects on the optical, electrical, and photocatalytic properties of undoped CuS thin films nanodisks vacuum annealed at different temperatures were investigated. The chemical bath prepared CuS thin films were obtained at 40°C on glass substrates. The grain size of13.5±3.5 nm was computed directly from high-resolution transmission electron microscopy (HRTEM) images. The electrical properties were measured by means of both Hall effect at room temperature and dark resistivity as a function of the absolute temperature 100–330 K. The activation energy values were calculated as 0.007, 0.013, and 0.013 eV for 100, 150, and 200°C, respectively. The energy band gap of the films varied in the range of 1.98 up to 2.34 eV. The photocatalytic activity of the CuS thin film was evaluated by employing the degradation of aqueous methylene blue solution in the presence of hydrogen peroxide. The CuS sample thin film annealed in vacuum at 150°C exhibited the highest photocatalytic activity in presence of hydrogen peroxide.

Laser Ablation of CuInSe2 and CuIn/GaSe2 Alloys for Solar Cell Applications

1992 ◽  
Vol 285 ◽  
Author(s):  
Arthur E. hill ◽  
Seppo Leppåvuori ◽  
Robert D. Tomlinson ◽  
Richard D. Pilkington ◽  
Juhani Levoska ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Laser Ablation ◽  
Source Material ◽  
Full Potential ◽  
Semiconductor Thin Films ◽  
Copper Indium ◽  
Physical Deposition ◽  
Ternary Semiconductor ◽  
High Absorption Coefficient

ABSTRACTCopper indium diselenide (CIS) is one of the most promising materials proposed for use in the next generation of solar cells. A successful technique to deposit thin films of this material, which would maximise the advantage offered by its exceptionally high absorption coefficient and radiation resistance, has proved to be elusive. Dissociation of the source material during the physical deposition of these thin films has forced commercial production to adopt a binary (Cu/In) deposition route with a subsequent selenisation stage. This has proved to be a major difficulty; selenisation has introduced its own problems of non-uniformity and toxicity. Laser ablation is especially suited to the deposition of multi-component films in that the initial composition is conserved.Single crystal and polycrystalline targets of CIS were laser ablated using an XeCl excimer laser. The films were analysed using EDAX, XRD, RBS and Raman spectroscopy. Results from EDAX and RBS measurements indicated that the composition of the source material had largely been maintained in the films. This suggests that laser ablation could prove to be a significant technique in the preparation of complex ternary semiconductor thin films for solar cell applications which would allow the full potential of these materials to be realised in device production.

scholarly journals Copper-Iron Oxide: A Highly Effective Photocatalyst Than TiO2 Prepared by One-Step Sparking Process

2021 ◽  
Author(s):  
Arisara Panthawan ◽  
Nidchamon Jumrus ◽  
Panupong Sanmuangmoon ◽  
Winai Thongpan ◽  
Tewasin Kumpika ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Iron Oxide ◽  
Annealing Temperature ◽  
Quartz Substrate ◽  
Composite Films ◽  
Energy Band Gap ◽  
Optimum Ratio ◽  
Different Temperatures ◽  
One Step ◽  
Photocatalytic Applications

Abstract Copper-iron (Cu-Fe) oxide composite films were successfully deposited on quartz substrate by a facile sparking process. The nanoparticles were deposited on the substrate after sparking off the Fe and Cu tips with different ratios and were then annealed at different temperatures. The network particles was observed after annealed the film at 700°C. Meanwhile, XRD and SAED patterns of the annealed films at 700°C consisted of a mixed phase of CuO, γ-Fe2O3, CuFe2O4 and CuFe2O. The film with a lowest energy band gap (Eg) of 2.56 eV was observed after anneal at 700°C. Interestingly, the optimum ratio and annealing temperature show highly photocatalytic activity than annealed TiO2 at 500 and 700°C. This is a novel photocatalyst which can be replace TiO2 for photocatalytic applications in the future.

Cadmium indium selenide semiconducting nanofibers by single step electrochemical route

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540024 ◽  
Author(s):  
B. G. Wagh ◽  
Anuradha B. Bhalerao ◽  
R. N. Bulakhe ◽  
C. D. Lokhande
Keyword(s):  
Thin Films ◽  
Selenium Dioxide ◽  
Indium Selenide ◽  
Single Step ◽  
Photoelectrochemical Cell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Semiconductor Thin Films ◽  
Ternary Semiconductor ◽  
Cadmium Indium

The growth of ternary semiconductor thin films of cadmium indium selenide nanofibers has been carried out from aqueous solution of cadmium sulphate, indium trichloride, and selenium dioxide by electrochemical route. These thin films have been further optimized using photoelectrochemical cell (PEC). Optimized thin film has been characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).

scholarly journals Characteristics and Photocatalytic Properties of Thin Film Prepared by Sputter Deposition and Post-N+Ion Implantation

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Haider A. Shukur ◽  
Mitsunobu Sato ◽  
Isao Nakamura ◽  
Ichiro Takano
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Ion Source ◽  
Chemical State ◽  
X Ray ◽  
Force Microscopy ◽  
N Concentration ◽  
Blue Solution

TiO2thin films of a rutile, an anatase, and a mixture type with anatase and rutile were fabricated by a magnetron sputtering method. The fabricated films were irradiated by N+ions with several doses using the Freeman ion source. Atomic force microscopy (AFM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-VIS spectrophotometer were employed to investigate morphology, structure, chemical state, and optical characteristics, respectively. Photocatalytic activity was evaluated by degradation of a methylene blue solution using UV and visible light. TiO2thin films with each structure irradiated by N+ions showed the different N concentration in the same N+ion dose and the chemical state of XPS results suggested that an O atom in TiO2lattice replaced by an N atom. Therefore the photocatalytic activity of TiO2thin films was improved under visible light. The maximum photocatalytic activity of TiO2thin films with each structure was indicated at N concentration of 2.1% for a rutile type, of 1.0% for an anatase type, and of 3.8% for a mixture type under the condition of  ions/cm2in N+ion dose.

Improvement of photocatalytic activity of surfactant modified In2O3 towards environmental remediation

2018 ◽  
Vol 42 (4) ◽  
pp. 2467-2475 ◽  
Author(s):  
Debasis Sariket ◽  
Sanjib Shyamal ◽  
Paramita Hajra ◽  
Harahari Mandal ◽  
Aparajita Bera ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Environmental Remediation ◽  
Surface Coverage ◽  
Catalytic Properties ◽  
Semiconductor Thin Films ◽  
Surfactant Modification

TX-100 surfactant modification of In2O3 semiconductor thin films with better surface coverage and crystallinity for photoelectrochemical applications with improved catalytic properties.

scholarly journals Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method

Cerâmica ◽  
2020 ◽  
Vol 66 (378) ◽  
pp. 145-153
Author(s):  
T. B. O. Nunes ◽  
N. F. Andrade Neto ◽  
L. M. P. Garcia ◽  
R. M. Nascimento ◽  
M. R. D. Bomio ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Spin Coating ◽  
High Efficiency ◽  
Diffuse Reflectance Spectroscopy ◽  
Photocatalytic Properties ◽  
Effect Of Temperature ◽  
Multilayer Thin Films ◽  
Spin Coating Method ◽  
Coating Method

Abstract TiO2-CeO2 multilayer thin films were deposited by the spin coating method and calcined at 500 and 700 °C. Thin films were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), and diffuse reflectance spectroscopy. Photocatalytic properties were estimated by varying the concentration of the methylene blue dye (MB) when illuminated by UV radiation. The XRD patterns showed that the temperatures of 500 and 700 °C were effective to obtain TiO2 and CeO2 phases. The difference in the homogeneity of TiO2 and CeO2 films was evident in the AFM images, where the films showed an average roughness of 2.0 and 5.3 nm, respectively. The CeO2-TiO2 thin film obtained at 700 °C showed the best photocatalytic activity, reducing the concentration of MB by approximately 80%, while the CeO2 and TiO2 films obtained at 700 °C reduced only 20% and 29%, respectively. The reuse test showed that the thin films maintained their photocatalytic activity after 4 cycles, and there was no need for thermal treatment, indicating that it is an immobilized photocatalyst with high efficiency in the degradation of organic dyes.

scholarly journals Physical and photocatalytic properties of sprayed Dy doped ZnO thin films under sunlight irradiation for degrading methylene blue

RSC Advances ◽  
2021 ◽  
Vol 11 (40) ◽  
pp. 24917-24925
Author(s):  
G. El Fidha ◽  
N. Bitri ◽  
F. Chaabouni ◽  
S. Acosta ◽  
F. Güell ◽  
...  
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Zinc Oxide ◽  
Photocatalytic Activity ◽  
Spray Pyrolysis ◽  
Photocatalytic Properties ◽  
Zno Thin Films ◽  
Sunlight Irradiation ◽  
Doped Zno

Dysprosium-doped zinc oxide (ZnO) thin films prepared through spray pyrolysis show outstanding photocatalytic activity for the degradation of methylene blue.

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