TiO2 thin film has attracted considerable attention in recent years, due to its different refractive index and transparency with amorphous and different crysta ls in the visible and near-infrared wavelength region, hi...TiO2 thin film has attracted considerable attention in recent years, due to its different refractive index and transparency with amorphous and different crysta ls in the visible and near-infrared wavelength region, high dielectric constant, wide band gap, high wear resistance and stability, etc, for which make it being used in many fields. This paper aims to investigate the optical characterizatio n of thin film TiO2 on silicon wafer. The TiO2 thin films were prepared by DC re active magnetron sputtering process from Ti target. The reflectivity of the film s was measured by UV-3101PC, and the index of refraction (n) and extinction coef ficient (k) were measured by n & k Analyzer 1200.展开更多
It is our great pleasure to announce that four international renowned scholars Prof.Dr.Alessandro Tredicucci,Prof.Dr.Rui Q.Yang,Prof.Dr.Yonghang Zhang,and Prof.Dr.Yu.P.Yakovlev have accepted our invitations to join th...It is our great pleasure to announce that four international renowned scholars Prof.Dr.Alessandro Tredicucci,Prof.Dr.Rui Q.Yang,Prof.Dr.Yonghang Zhang,and Prof.Dr.Yu.P.Yakovlev have accepted our invitations to join the Journal of Infrared and Millimeter Waves Editorial and Advisory Board.The Editorial Board includes experts from all major fields within the infrared,millimeter and terahertz waves to cover the scope of the journal.展开更多
Spectral selective absorbent film is a crucial factor for the solar heating devi ce. There are many kinds of spectral selective absorbing film made by different ways. TiNxOy thin film with excellent spectral selecting...Spectral selective absorbent film is a crucial factor for the solar heating devi ce. There are many kinds of spectral selective absorbing film made by different ways. TiNxOy thin film with excellent spectral selecting absobent property were successfully prepared by DC magnetron sputtering with Ar as working gas, N2 and O2 as reactive gas, 99.9% titanium as the target and is copper slice as the subs trate. In this article, the optical characteristics and microstructure of TiNxO y thin film were studied. Inputing O2 can decrease the reflection of the visible lights, and double layer film can get good absorption for solar energy.展开更多
Poly-crystalline silicon thin film has big potential of reducing the cost of solar cells. In this paper the preparation of thin film is introduced, and then the morphology of poly-crystalline thin film, is discussed. ...Poly-crystalline silicon thin film has big potential of reducing the cost of solar cells. In this paper the preparation of thin film is introduced, and then the morphology of poly-crystalline thin film, is discussed. On the film we developed poly-crystalline silicon thin film solar cells with efficiency up to 6.05% without anti-reflection coating.展开更多
Polycrystalline silicon thin films were prepared by RTCVD (rapid thermal chemica l vapor deposition) method on several substrates such as SSP (silicon sheet from powder) ribbon, poly-Si wafer and mono-Si wafer. Intra-...Polycrystalline silicon thin films were prepared by RTCVD (rapid thermal chemica l vapor deposition) method on several substrates such as SSP (silicon sheet from powder) ribbon, poly-Si wafer and mono-Si wafer. Intra-granular defects such as stacking faults, twins and microstructure defects were investigated on thin fil ms by scan electron microscopy (SEM) technique.展开更多
The main characteristics of glass, polymethyl methacrylate (PMMA) and polycarbon ate (PC) were presented. The transmittance of glass, PMMA and PC was measured by the UV-VIS spectroscopy analysis. PMMA and PC have the ...The main characteristics of glass, polymethyl methacrylate (PMMA) and polycarbon ate (PC) were presented. The transmittance of glass, PMMA and PC was measured by the UV-VIS spectroscopy analysis. PMMA and PC have the advantages of higher tra nsparency, higher resistance and lower density. It is indicated that both PMMA a nd PC are suitable for encapsulating solar minimodules.展开更多
An isotropic etching technique of texturing silicon solar cells has been applied to polycrystalline silicon wafers with different acid concentrations. Optimal e tching conditions have been determined by etching rate c...An isotropic etching technique of texturing silicon solar cells has been applied to polycrystalline silicon wafers with different acid concentrations. Optimal e tching conditions have been determined by etching rate calculation, scanning ele ctron microscope (SEM) image and reflectance measurement. The surface morphology of the textured wafers varies in accordance with the different etchant concentr ation which in turn leads to the dissimilarity of etching speed. Textured polycr ystalline silicon wafer surfaces display randomly located etched pits which can reduce the surface reflection and enhance the light absorption. The special rela tionship between reflectivity and etching rate was studied. Reflectance measurem ents show that isotropic texturing is one of the suitable techniques for texturi ng polycrystalline silicon wafers and benefits solar cells performances.展开更多
The optimization of silicon sheet from powder (SSP) technology as polycrystalli ne silicon thin film (poly-CSiTF) solar cells' substrate materials is studied by orthogonal design experimental method. Based on tech...The optimization of silicon sheet from powder (SSP) technology as polycrystalli ne silicon thin film (poly-CSiTF) solar cells' substrate materials is studied by orthogonal design experimental method. Based on technological optimization of S SP prepared from electronic grade silicon powder, SSP solar cell devices with si mple structure are prepared and the effect of SSP substrate is discussed. Up to now, the conversion efficiency of the prepared solar cells on low purity SSP sub strate with fundamental structure has reached 8.25% (with area of 1cm×1cm).展开更多
Photoelectrochromic device is a combination of dye-sensitized solar cells and el ectrochromic WO3 layers. Ectrochroelmic WO3 layer and TiO2 layer had been prepar ed by the sol-gel process, then be assembled to pohotoe...Photoelectrochromic device is a combination of dye-sensitized solar cells and el ectrochromic WO3 layers. Ectrochroelmic WO3 layer and TiO2 layer had been prepar ed by the sol-gel process, then be assembled to pohotoelectrochromic device. The effects of heating temperature on photoelectrochromic were investigated. The re sults showed that thin films prepared by dip-coating and spin-coating had good f ilm quality and the device made by the method mentioned in the paper had good ph otoelectrochromic properties.展开更多
The results of comprehensive microscopic optical model calculations are pres-ented for the K<sup>+</sup> scattering from <sup>6</sup>Li,<sup>12</sup>C,<sup>28</sup>Si an...The results of comprehensive microscopic optical model calculations are pres-ented for the K<sup>+</sup> scattering from <sup>6</sup>Li,<sup>12</sup>C,<sup>28</sup>Si and <sup>40</sup>Ca at incident momenta 400-800MeV/c.The unconventional medium effect （i.e.the density-dependent correction forthe K<sup>+</sup>-nucleon scattering amplitude） is considered in two approaches.Both results arein agreement with recent experimental data.The influence of the correction on K<sup>+</sup> scat-tering from different nuclei are discussed in detail and only a weak dependence of thein-medium nucleon“swelling”effects on the mass number of target nuclei is found ex-cept for very light loosely-bound nucleus.展开更多
We present a rigorous theoretical model for the influence of the aperture in interferometric out-of-focus imaging. We investigate the role of this effect on the properties of speckle-like patterns generated by irregul...We present a rigorous theoretical model for the influence of the aperture in interferometric out-of-focus imaging. We investigate the role of this effect on the properties of speckle-like patterns generated by irregular, rough particles. Finally, we determine the conditions under which these patterns are no longer representative of particle size but of the aperture itself and the defocus parameter.展开更多
基金This work was supported by the National Natural Science Foundation of China(No,50376067)the Plan for Science&Technology Development of Guangzhou(2001-Z-117-01).
文摘TiO2 thin film has attracted considerable attention in recent years, due to its different refractive index and transparency with amorphous and different crysta ls in the visible and near-infrared wavelength region, high dielectric constant, wide band gap, high wear resistance and stability, etc, for which make it being used in many fields. This paper aims to investigate the optical characterizatio n of thin film TiO2 on silicon wafer. The TiO2 thin films were prepared by DC re active magnetron sputtering process from Ti target. The reflectivity of the film s was measured by UV-3101PC, and the index of refraction (n) and extinction coef ficient (k) were measured by n & k Analyzer 1200.
文摘It is our great pleasure to announce that four international renowned scholars Prof.Dr.Alessandro Tredicucci,Prof.Dr.Rui Q.Yang,Prof.Dr.Yonghang Zhang,and Prof.Dr.Yu.P.Yakovlev have accepted our invitations to join the Journal of Infrared and Millimeter Waves Editorial and Advisory Board.The Editorial Board includes experts from all major fields within the infrared,millimeter and terahertz waves to cover the scope of the journal.
文摘Spectral selective absorbent film is a crucial factor for the solar heating devi ce. There are many kinds of spectral selective absorbing film made by different ways. TiNxOy thin film with excellent spectral selecting absobent property were successfully prepared by DC magnetron sputtering with Ar as working gas, N2 and O2 as reactive gas, 99.9% titanium as the target and is copper slice as the subs trate. In this article, the optical characteristics and microstructure of TiNxO y thin film were studied. Inputing O2 can decrease the reflection of the visible lights, and double layer film can get good absorption for solar energy.
基金This work was supported by the Chinese Academy of Sciences within the Hundred Talent Project(No.99-019-422288)National High Technical Research and Development Programme of China(No.2001AA513060).
文摘Poly-crystalline silicon thin film has big potential of reducing the cost of solar cells. In this paper the preparation of thin film is introduced, and then the morphology of poly-crystalline thin film, is discussed. On the film we developed poly-crystalline silicon thin film solar cells with efficiency up to 6.05% without anti-reflection coating.
基金This work was supported by the Chinese Academy of Sciences within"The Hundred Talent Projecr"(99-019-122288)National High Technical Research and Development Programme of China(No.2001AA513060)+1 种基金the 10th Five-Year Plan of Guangdong Province(A1100501)the National Natural Science Fundation of China(No.50376067).
文摘Polycrystalline silicon thin films were prepared by RTCVD (rapid thermal chemica l vapor deposition) method on several substrates such as SSP (silicon sheet from powder) ribbon, poly-Si wafer and mono-Si wafer. Intra-granular defects such as stacking faults, twins and microstructure defects were investigated on thin fil ms by scan electron microscopy (SEM) technique.
文摘The main characteristics of glass, polymethyl methacrylate (PMMA) and polycarbon ate (PC) were presented. The transmittance of glass, PMMA and PC was measured by the UV-VIS spectroscopy analysis. PMMA and PC have the advantages of higher tra nsparency, higher resistance and lower density. It is indicated that both PMMA a nd PC are suitable for encapsulating solar minimodules.
基金This work was supported by the Nationa!Natural Science Foundation of China(No.50376067)National High Technical Research and Development Programme of China(No.2001AA513060).
文摘An isotropic etching technique of texturing silicon solar cells has been applied to polycrystalline silicon wafers with different acid concentrations. Optimal e tching conditions have been determined by etching rate calculation, scanning ele ctron microscope (SEM) image and reflectance measurement. The surface morphology of the textured wafers varies in accordance with the different etchant concentr ation which in turn leads to the dissimilarity of etching speed. Textured polycr ystalline silicon wafer surfaces display randomly located etched pits which can reduce the surface reflection and enhance the light absorption. The special rela tionship between reflectivity and etching rate was studied. Reflectance measurem ents show that isotropic texturing is one of the suitable techniques for texturi ng polycrystalline silicon wafers and benefits solar cells performances.
文摘The optimization of silicon sheet from powder (SSP) technology as polycrystalli ne silicon thin film (poly-CSiTF) solar cells' substrate materials is studied by orthogonal design experimental method. Based on technological optimization of S SP prepared from electronic grade silicon powder, SSP solar cell devices with si mple structure are prepared and the effect of SSP substrate is discussed. Up to now, the conversion efficiency of the prepared solar cells on low purity SSP sub strate with fundamental structure has reached 8.25% (with area of 1cm×1cm).
文摘Photoelectrochromic device is a combination of dye-sensitized solar cells and el ectrochromic WO3 layers. Ectrochroelmic WO3 layer and TiO2 layer had been prepar ed by the sol-gel process, then be assembled to pohotoelectrochromic device. The effects of heating temperature on photoelectrochromic were investigated. The re sults showed that thin films prepared by dip-coating and spin-coating had good f ilm quality and the device made by the method mentioned in the paper had good ph otoelectrochromic properties.
基金The project supportcd in part by the National Natural Science Foundation of China
文摘The results of comprehensive microscopic optical model calculations are pres-ented for the K<sup>+</sup> scattering from <sup>6</sup>Li,<sup>12</sup>C,<sup>28</sup>Si and <sup>40</sup>Ca at incident momenta 400-800MeV/c.The unconventional medium effect （i.e.the density-dependent correction forthe K<sup>+</sup>-nucleon scattering amplitude） is considered in two approaches.Both results arein agreement with recent experimental data.The influence of the correction on K<sup>+</sup> scat-tering from different nuclei are discussed in detail and only a weak dependence of thein-medium nucleon“swelling”effects on the mass number of target nuclei is found ex-cept for very light loosely-bound nucleus.
文摘We present a rigorous theoretical model for the influence of the aperture in interferometric out-of-focus imaging. We investigate the role of this effect on the properties of speckle-like patterns generated by irregular, rough particles. Finally, we determine the conditions under which these patterns are no longer representative of particle size but of the aperture itself and the defocus parameter.
