Papers by Keyword: CDS

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Authors: Peng Wang, Li Bo Fan, Li Juan Sun, Zhen Hua Zhang, Xin Bing Zhu, Yan Ge Zhang, Pin Jiang Li
Abstract: A film solar cell was made with a structure of Glass/ITO/CdS/PbS/Al. CdS film was obtained by thermal evaporation. PbS film was prepared by a simple solid-solid reaction. The solar cells are photosensitive in a large spectral range (extending from near infrared to high energy side regions). The cell with the area of 0.15 cm2 without any special treatment has shown the values of open-circuit voltage (Voc) of 138 mV and short circuit current (Jsc) of 0.01 mA/cm2 with the efficiency of 0.33 % and the fill factor (FF) is 0.26 under illumination intensity of 100 mW/cm2.
Authors: A. Kazlauskas, B. Ullrich, K. Misawa, Takayuki Kobayashi
Authors: S. Achour, M.T. Belahrache, Abdelhamid Harabi, Nouar Tabet
Authors: Yuichi Sato, Manabu Arai, Kazuki Ito
Abstract: Cadmium sulfide (CdS) semiconductor thin films were grown on sapphire single-crystal substrates. Indium oxide (In2O3) and zinc oxide (ZnO), which are typical transparent conducting materials, were heteroepitaxially grown on sapphire substrates as underlayers before the cadmium-based semiconductor thin films were grown on them. Subsequently, cadmium-based thin films were heteroepitaxially grown on the transparent conducting under-layers. Crystallinity and photoluminescence properties of the cadmium-based thin films grown on the underlayers were evaluated and compared with those of the cadmium-based thin films grown directly on sapphire substrates.
Authors: Kemawadee Udomphan, Atchana Wongchaisuwat, Ladda Meesuk
Abstract: CdS, a bright yellow precipitate is well known for its optical, electrical, electro-optical and photochemical properties. CdS has also been prepared in the interlayer spaces of layered materials such as laponite and montmorillonite (bentonite). Several properties of intercalated CdS have been studied, but for the best of our knowledge there is no reports on its use. In this work, we applied CdS-intercalated bentonite / carbon composite as an electrode for determination of S2- ion in aqueous solution. CdS- intercalated bentonite was prepared by the in situ solid-solid reaction between Cd(II)-bentonite and Na2S. To construct a potentiometric electrode, CdS-intercalated bentonite was mixed with artificial graphite, polytetrafluoroethylene (PTFE) and carboxymethylcellulose (CMC) in an appropriate ratio. The electrode was used to determine S2- in aqueous solution, graphs of log [S2-] vs measured voltage (mv) gave linear relation up to 3 orders of ion concentrations. Apart from the reproducibility and good precision, the electrode is good for its selectivity, durability and low cost.
Authors: Kemawadee Udomphan, Atchana Wongchaisuwat, Ladda Meesuk
Abstract: CdS-intercalated bentonite was prepared by an in situ solid-solid reaction and mixed with artificial graphite, polytetrafluoroethylene (PTFE) and carboxymethyl cellulose (CMC) in an appropriate ratio to construct a novel, potentiometric sulfide ion selective electrode. Apart from its good selectivity, the electrode is low cost and good precision.
Authors: Yao Jun Zhang, Du Ping Chen, Li Cai Liu, Ya Chao Wang
Abstract: A novel approach for synthesis of CdS-intercalated nanocomposites was investigated by thermal decomposition of cadmium thiourea complex embedded in the interlayer of montmorillonite. XRD results indicated that the incorporation of CdS into the interlayer of montmorillonite led to expansion of the layer spacing. The diffuse reflectance UV-visible spectra showed that the absorption edge of nanocomposites of CdS and montmorillonite was blue-shifted as compared with pure CdS due to quantum size effect. The photoelectric performance of nanocomposites was evaluated by photocatalytic water-splitting for production of hydrogen and the nanocomposites displayed much higher photocatalytic activities of H2 production than that of pure CdS owing to the synergistic effects between CdS and montmorillonite. A probable photocatalytic mechanism was proposed.
Authors: G.H. Tariq, M. Anis-ur-Rehman
Abstract: Polycrystalline thin films of Cadmium Sulfide (CdS) have been extensively studied for application as a window layer in CdTe/CdS and CIGS/CdS thin film solar cells. Higher efficiency of solar cells is possible by a better conductivity of a window layer, which can be achieved by doping these films with suitable elements. CdS thin films were deposited on properly cleaned glass substrate by thermal evaporation technique under vacuum2×10-5mbar. Films were structurally characterized by using X-ray diffraction. The X-ray diffraction spectra showed that the thin films were polycrystalline in nature. Aluminum was doped chemically in as deposited and annealed thin films by immersing films in AlNO33.9H2O solutions respectively. Comparison between the effects of different doping ratios on the structural and optical properties of the films was investigated. Higher doping ratios have improved the electrical properties by decreasing the resistivity of the films and slightly changed the bandgap energy Eg. The grain size, strain, and dislocation density were calculated for as-deposited and annealed films.
Authors: Xue Yun Song, Xiu Xi Wang, Xiang Hua Zeng, Yong Zhang, Yi Pei Hu, Hai Tao Chen
Abstract: Zn1-xCdxS alloy nanoparticles have been prepared via solvothermal approach. The effects of the mole fraction of Cd on the nanoparticles’ structure, size and photoluminescence spectra were investigated. It shows that with increase in mole fraction of Cd, the lattice structure of Zn1-xCdxS changes from cubic to hexagonal, and the size of these nanoparticles varied within 6-40nm. Room temperature photoluminescence measurements show an intense red shift from 518nm to 662nm. And the band gap energies from 2.3 to 3.54eV can be realized for the Zn1-xCdxS nanopartices. Furthermore, it is found that the conversion of Methylene Blue (MB) using Zn0.6Cd0.4S as the photocatalyst was up to 97% after 2h of irradiation.
Authors: Wei Wei He, Hui Min Jia, Yan Lei
Abstract: In this paper, we fabricated the CdS nanocrystals film on indium-tin oxide (ITO) glass substrates through one-step solvothermal treatment of cadmium nanocrystals layer and sulfur powder in the presence of absolute ethanol. And then we spin-coated a poly (3-hexylthiophene) (P3HT) layer in the CdS film, and finally evaporated an Au electrode through a shadow mask. The resulting products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and atomic force microscope (AFM). A photovoltaic performance measurement of the fabricated device (ITO/CdS:P3HT/Au) shows a short circuit current density (Jsc) of 0.82 mA cm2, and a power conversion efficiency (η) of 0.03% under an illumination of 100 mW/cm2.
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