Papers by Keyword: PbS

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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.
176
Authors: Peng Wang, An Mei Wang, Zhen Hua Zhang, Li Bo Fan, Yan Lei, Meng Yuan Yang, Yan Ge Zhang, Pin Jiang Li
Abstract: Lead sulfide (PbS) magic cubes were prepared by a simple hydrothermal method without any organic solvent. The product was characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and absorption spectrum. A solar cell, with a structure of Al/P3HT:PbS/PEDOT:PSS/ITO/Glass, was made. By a spin coating method, a hybrid film of poly(3-hexylthiophene) (P3HT) and PbS was prepared on the PEDOT:PSS layer. The solar cells are photosensitive in a large spectral range (visible and near infrared regions). The cells, with the area of 0.15 cm2 without any special treatment, have shown the values of open-circuit voltage (Voc) of 242 mV, short circuit current (Jsc) of 0.01 mA/cm2, energy conversion efficiency (η) of 0.01 % and fill factor (FF) of 0.31 under illumination intensity of 100 mW/cm2.
236
Authors: Peng Wang, Li Bo Fan, Zhen Hua Zhang, Yan Lei, Yan Ge Zhang, Pin Jiang Li
Abstract: Cubic-like lead sulfide (PbS) films were in situ fabricated on lead (Pb) foil on a large scale by solvothermal method. Ethanol and ethylenediamine were used as the solvent. The films were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), absorption and the Fourier transformation-infrared (FT-IR) spectra. A solar cell was made by the hybrid film of P3HT and cubic-like PbS. The solar cells are photosensitive in a large spectral range (visible and near infrared regions). The cell with the area of 0.20 cm2 without any special treatment has shown the values of open-circuit voltage (Voc) of 250 mV and short circuit current (Jsc) of 0.01 mA/cm2 with the efficiency of 0.01 % and the fill factor (FF) is 0.36 under illumination intensity of 100 mW/cm2.
166
Authors: Young Won Chang
Abstract: An internal variable theory has been proposed to account for the essential microstructures during inelastic deformation. The framework of the theory is built on the basis of well known dislocation dynamics to provide the concept of an internal strain tensor as the most fundamental deformation state variable. The plastic and inelastic strain rate tensors are then naturally defined and also a kinematics relation among them can further be derived from the time rate of change of this internal strain tensor, which in fact accounts for the evolution of microstructures during inelastic deformation. To complete the theory, the constitutive relations between the various stress variables and their conjugate deformation rate variables are then derived based on the dislocation kinetics. The theory is then further extended to describe the structural superplasticity, taking this slip zone model with dislocation pile-ups as the major accommodation mechanism for grain boundary sliding. The experimental results obtained from the various crystalline materials are then presented and compared with each other in relation to the internal variable theory for inelastic deformation.
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Authors: S. Lindroos, J. Puišo, Sigitas Tamulevičius, Markku Leskelä
Abstract: The successive ionic layer adsorption and reaction (SILAR) technique was used to grow double layer structures of CdS-PbS. The growth of thin films by the SILAR technique from diluted aqueous solutions was achieved, ionic layer by ionic layer, at room temperature and normal pressure. The thin films on silicon were characterized by XRD, AFM, XPS. It was established that a double layer could be grown on crystalline silicon and that the morphology and crystallinity of the films could be controlled by changing the lead precursor.
243
Authors: Yuan Ming Zhang, Lin Chen, Hong Cheng Pan
Abstract: The Ag-Ag2S-PbS thin films were co-electrodeposited on indium-tin-oxide (ITO) coated glass substrates from aqueous solutions containing 0.01 M AgNO3, 0.01 M Pb (NO3)2, 0.1 M Na2S2O3, 0.02 M ethylenediaminetetraacetic acid disodium salt, and 0.5 M Na2SO4. X-ray diffraction (XRD), scanning electron microscopy (SEM), and cyclic voltammetry (CV) were used to investigate the Ag-Ag2S-PbS thin films. The X-ray diffraction analysis demonstrated the presence of cubic structure of metallic silver, acanthite Ag2S, and cubic PbS, which is consistent with the CV analysis. The effect of different Ag+/Pb2+ ratios on the morphology and composition of the Ag-Ag2S-PbS thin films were also studied.
397
Authors: Samira Kaci, Aissa Keffous, Mohamed Trari, Brahim Mahmoudi, Hamid Menari
Abstract: In this work, we have employed chemical bath deposition (CBD) method to obtain nanocrystalline PbS thin films in the presence of polyethylene oxide (PEO). The spectral response of Au/PbS-pSi(100)/Al Schottky photodiodes at different PEO amount were studied. The response exhibits a combined effect of photogeneration in the heterojunction (HJ) Si side and PbS. Spectral response were observed progressively at shorter wavelength due to the surface absorption. The peak centered at 410 nm properly corresponds to photo-exited holes being injected from PbS to the Si substrate. The intensity of the peak of R(λ) increases with PEO amount, this increasing was attributed to the decreasing of band gap (Eg).
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Authors: Peng Wang, Li Bo Fan, Meng Yuan Yang, Zhen Hua Zhang, Xin Bing Zhu, Yan Ge Zhang, Pin Jiang Li
Abstract: A new hybrid film solar cell was made with a structure of Glass/ITO/PbS/P3HT/Al. PbS film was prepared by a simple solid-solid reaction and poly(3-hexylthiophene) (P3HT) film was obtained by a spin coating method. The solar cells are photosensitive in a large spectral range (extending from near infrared to high energy side regions). Without any special treatment, the cell with an area of 0.15 cm2 has shown values of open-circuit voltage (Voc) of 85 mV and fill factor (FF) of 0.33 under an illumination intensity of 100 mW/cm2.
172
Authors: K. Giribabu, R. Suresh, R. Manigandan, L. Vijayalakshmi, A. Stephen, V. Narayanan
Abstract: Lead sulphide nanoparticles was synthesized using hydrothermal method. The formed lead suplphide (PbS) nanoparticles were characterized by using FT-IR, XRD, FE-SEM and cyclic voltammetry. The electrochemical detection of pollutant (4-Nitrophenol) was carried out by coating the lead sulphide onto the glassy carbon electrode (GCE) by drop coating method. The electrocatalytic performance of the modified GCE electrode with 4-Nitrophenolwas better when compared with bare electrode.
276
Authors: Zheng Guo Zhang, Xin Gao, Fei Han
Abstract: PbS thin films were successfully prepared by chemical bath deposition at low temperature of 40, 50 and 60°C using an improved transparent precursor solution which contained 0.05 M lead nitrate, 0.2 M sodium hydroxide, 0.2 M triethanolamine and 0.06 M thiourea. The obtained PbS thin films appeared smooth and compact, and the crystal sizes were calculated to be 62 nm, 131 nm, 254 nm by Scherrer's equation at deposition temperatures of 40, 50 and 60°C, the corresponding band gaps were estimated to be 1.58 eV, 1.38 eV and 1.20 eV, respectively. The work function of the PbS thin films were measured by Ultraviolet Photoelectron Spectroscopy and they were –4.90, –4.60 and –4.50 eV, respectively. The valence and conduction band edges of the PbS thin films were calculated from the work function and optical band gap values. What is more, the optimized PbS/TiO2 heterojunction thin film solar cell combined with spiro-OMeTAD hole-transport layer was fabricated and obtained the photoelectric conversion efficiency of 0.24%.
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