methods of growing amorphous silicon for solar cells
Synthesis and characterization of silicon nanowires using tin catalyst for solar cells application
Ngày tải lên :
16/03/2014, 15:12
... characteristics of the fabricated SiNWs solar cell under dark and light conditions the thickness of Si base substrate more thinly For improvement of conversion efficiency of the SiNWs solar cells, the ... performance Therefore, further reduction of the reflectance will be expected from the optimization of the synthesis conditions of SiNWs For analysis of the electrical properties, the I–V curve of the fabricated ... shapes of SiNWs after formation of pn junction were slightly curved As mentioned above, we expect the SiNWs solar cells to show improved optical properties compared with conventional planar Si solar...
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ADVANCED METALLISATION METHODS FOR MONOCRYSTALLINE SILICON WAFER SOLAR CELLS
Ngày tải lên :
09/09/2015, 08:11
... used for metallisation of HET cells [38] Metallisation technologies for Si wafer solar cells (including HET cells) are discussed further in Section 2.6 Screen printing for HET cells and plating for ... density instead of current The current density of solar cells can be 19 compared irrespective of solar cell area The Si wafer solar cells fabricated and analysed during the course of this thesis ... homojunction and amorphous silicon/ crystalline silicon heterojunction solar cells fabricated on monocrystalline silicon wafers For silicon wafer solar cells it is extremely important to achieve high...
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Design, fabrication and characterization of thin film materials for heterojunction silicon wafer solar cells
Ngày tải lên :
09/09/2015, 11:15
... 14 2.1 History of heterojunction silicon wafer solar cells 14 2.2 Working principles of heterojunction silicon solar cells 15 2.3 Loss mechanisms in the solar cells 18 2.4 ... monocrystalline/multicrystalline solar cells, thin-film solar cells, organic solar cells, tandem cells, concentrator cells and varying choice of materials such as silicon, gallium arsenide (GaAs), ... at the rear-side of the c-Si wafer, for the contact regions (i.e c-Si/metal in case of diffused solar cells and c-Si/aSi/metal in case of hybrid heterojunction solar cells) and for the passivated...
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Advanced surface passivation of crystalline silicon for solar cell applications
Ngày tải lên :
09/09/2015, 11:08
... passivation of the front and rear surfaces is of key importance for achieving higher conversion efficiency of silicon wafer solar cells [9] Recently the highest conversion efficiency of a crystalline silicon ... price of solar PV modules dropped from approximately $ 4/Wp in 2008 to less than $ 1/Wp in 2013 1.2 Crystalline silicon wafer solar cells Since the 1960s, crystalline silicon wafer solar cells ... °C, 100 mW/cm2, AM 1.5 G) for the Al-LBSF silicon solar cells with three different rear passivating dielectrics For the ease of comparison of the four graphs, the Y-axis of each graph was scaled...
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Direct writing for silicon wafer solar cells
Ngày tải lên :
09/09/2015, 11:16
... doped silicon surfaces, which has major consequences for the solar cell fabrication process viii Direct writing for silicon wafer solar cells List of tables List of tables Table 2.1 Benefit of inkjet ... deviation of the measurement 108 Table 5.3 One-Sun solar cell parameters of the champion solar cell 118 ix Direct writing for silicon wafer solar cells List of figures List of figures ... WRITING FOR SILICON WAFER SOLAR CELLS LICHENG LIU B.Eng (Hons.), NUS A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING NATIONAL UNIVERSITY OF...
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Surface passivation for heterojunction silicon wafer solar cells
Ngày tải lên :
09/09/2015, 11:31
... 163 List of Publications 177 xi xii Summary This thesis focuses on the development and analysis of surface passivating amorphous silicon alloys for heterojunction silicon wafer solar ... of the total production cost for c-Si based solar cells [8] Cost reduction in c-Si PV can mainly be achieved in two ways: (a) the reduction of the amount of bulk material used in individual cells ... through the formation of dangling bonds (DBs) These defects are responsible for major loss in solar cell’s efficiency Therefore, the key to high-efficiency HET cells lies in the reduction of such...
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Advanced luminescence based characterisation of silicon wafer solar cells
Ngày tải lên :
09/09/2015, 17:58
... multicrystalline silicon wafer solar cells 101 Luminescence spectroscopy for characterization of silicon wafer solar cells 5.1 103 Evaluation of the textured silicon wafer solar cell using ... spectroscopy of silicon wafer solar cells 123 Polarization analysis of luminescence for characterization of silicon wafer solar cells 6.1 125 The nature of polarization ... procedures for passivation and texturing of silicon wafer solar cells have been developed [58] More details on the fabrication of silicon wafer solar cells may be found in the Handbook of Photovoltaic...
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Enhanced broadband absorption is silicon micro structures by laser processing for solar cells
Ngày tải lên :
05/10/2015, 21:23
... of silicon solar cell efficiency [36] Chapter Background and literature review Optimizing the solar cell efficiency is all about minimization of losses Therefore, the boost of silicon solar cells ... enhancement of light absorption for solar cells by silicon surface texturing using laser micro/nano-processing Laser technology has become one of the commonly applied techniques for highefficiency silicon ... addressed Chapter Two describes the fundamental physics of antireflection for silicon based solar cell The optical properties of silicon solar cell are introduced The current antireflection and...
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Polymer assisted synthesis of aligned amorphous silicon nanowires and their core shell structures with au nanoparticles
Ngày tải lên :
16/03/2014, 15:06
... ratio for Si:C:O is ca 1.7:7.3:1, indicating that these particles are mainly composed carbon, which can provide evidence for the growth mechanism of the SiNWs The possibility of the formation amorphous ... hundreds of nanometers Most of them are straight and have a smooth surface Fig 3b shows a TEM image of individual curly wire with the average diameter of 400 nm, revealing the typical structure of ... carbon plays an important role in the formation of the SiNWs; (2) in the addition of a procedure that Si substrate was cleaned with aqueous solution of 5% HF for 10 to remove the native oxide layer,...
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Controlled growth of oriented amorphous silicon nanowires via a solid–liquid–solid (SLS) mechanism
Ngày tải lên :
16/03/2014, 15:14
... depiction of the SiNW growth via the SLS mechanism: (a) deposition of a thin layer of Ni on the Si (111) substrate; (b) formation of the Si–Ni eutectic liquid droplets; (c) the continuous di usion of ... to the substrate The length of SiNWs is about m, (b) SEM image of a cross part of the grooves SiNWs on the edge of grooves fall on to the substrate, (c) TEM image of SiNWs with average diameter ... growth of the amorphous SiNWs here is di erent from the VLS mechanism for conventional whiskers [4 – 6], revealing a di erent growth mechanism In the case of oven-laser ablation approach [1,2], silicon...
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Báo cáo hóa học: " Improved conversion efficiency of Ag2S quantum dot-sensitized solar cells based on TiO2 nanotubes with a ZnO recombination barrier layer" pdf
Ngày tải lên :
21/06/2014, 01:20
... conversion efficiency of the Ag2 S-sensitized TNTs is significantly enhanced due to the formation of ZnO on the TNTs Page of water at 92°C for 30 s, with the formation of solid ZnO layer Finally, ... level of Ag S is lower than that of TiO2 as shown in Figure 6a[40], but the CB level of CdS is higher than that of TiO2 Therefore, the electron transfer is more efficient in CdS/TNT solar cells ... However, for the ZnO/TNT film, the absorbance of the spectra slightly increases compared to that for plain TNTs, suggesting the formation of ZnO thin film on TNTs This result is similar to that for...
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![báo cáo khoa học: " A cluster randomized controlled trial comparing three methods of disseminating practice guidelines for children with croup [ISRCTN73394937]" pptx](https://media.store123doc.com/images/document/2014_08/12/medium_q63LtjvTTP.jpg)
báo cáo khoa học: " A cluster randomized controlled trial comparing three methods of disseminating practice guidelines for children with croup [ISRCTN73394937]" pptx
Ngày tải lên :
11/08/2014, 05:22
... Deer, Fort McMurray, Grande Prairie) Medical examiner's office We have also contacted the Alberta Medical Examiners' Offices and have arranged for review of children ≤ 16 years of age that died of ... a cause of respiratory emergencies in young children, and accounts for 5% of all emergent admissions in this population In the last 15 years, as a result of the publication of a number of therapeutic ... duration of croup symptoms and the absence of any severe adverse outcomes among children Overview of costing methods Costing information will be gathered in sufficient detail to allow a comparison of...
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Synthesis and functionalization of micro nano particles for malicious cells detection and elimination
Ngày tải lên :
14/09/2015, 14:09
... FUNCTIONALIZATION OF MICRO/NANO-PARTICLES FOR MALIGNANT CELLS DETECTION AND ELIMINATION HU FEIXIONG (B E., M S., Tianjin University) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMICAL ... distribution of the carrier can be visualized in vivo The encapsulation of tamoxifen in the polymer matrix can extend the release profile over that of other reported methods The anti-cancer activity of ... addition of stated amount of C6-beads) 62 Figure 3.7 Scanning electron micrograph of fungal spore on surface of C6-bead after antifungal assay (400 mg of beads in contact with 50 ml of sucrose...
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Thermal conductance of pristine amorphous silicon nanowires a non equilibrium greens function approach
Ngày tải lên :
16/10/2015, 15:35
... the current research work and the scope for further research in the future Modelling of Amorphous Silicon Amorphous Silicon (a-Si) is one variant of silicon Silicon atoms generally possess tetrahedral ... thermal behaviour Amorphous Silicon (a-Si) is one of the three variants of silicon that exists in solid form, the other two being Crystalline Silicon (c-Si) and Para crystalline Silicon (pc-Si) ... List of Figures 2.1(a) Structure of c-Si encompassing a central part of 14*3*2 unit cells and a left and right lead of 12 3*3*2 unit cells 2.1(b) Structure of a-Si encompassing a central part of...
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![physics and technology of amorphous-crystalline heterostructure silicon solar cells [electronic resource]](https://media.store123doc.com/images/document/14/y/di/medium_lh5MWKX2JH.jpg)
physics and technology of amorphous-crystalline heterostructure silicon solar cells [electronic resource]
Ngày tải lên :
29/05/2014, 23:53
... studies of the performance of heterojunction silicon solar cells are very important in order to understand the operation of the solar cells and optimize the design of solar- cell structures The AFORS-HET ... structure of heterojunction a-Si:H/c-Si solar cells made by Sanyo and b) performance of the solar cell as a function of p-type a-Si:H thickness [18] 2 Heterojunction Silicon Based Solar Cells 23 ... Schematic structure of ACJ-HIT solar cells made by Sanyo and b) performance of the solar cell as a function of intrinsic a-Si:H thickness [18] The performance of the HIT solar cell was further...
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báo cáo hóa học:" Stability of SiNX/SiNX double stack antireflection coating for single crystalline silicon solar cells" pdf
Ngày tải lên :
21/06/2014, 17:20
... velocities on V cm p -silicon using remote plasma silicon nitride passivation Appl Phys Lett 1996, 68:1232-1234 Hezel R, Jaeger K: Low-temperature surface passivation of silicon for solar cells J Electrochem ... antireflection coatings for silicon solar cells Mater Sci Eng 2011, 69:81-86 Lee I, Lim DG, Lee SH, Yi J: The effect of a double layer anti-reflection coating for a buried contact solar cell application ... Green MA: Effect of substrate heating on the adhesion and humidity resistance of evaporated MgF2/ZnS antireflection coatings and on the performance of high-efficiency silicon solar cells Sol Energy...
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Investigation of advanced light trapping concepts for plasma deposited solid phase crystallised polycrystalline silicon thin film solar cells on glass
Ngày tải lên :
09/09/2015, 11:16
... for poly-Si thin-film solar cells on glass [11] 17 2.3 Glass and Si texturing techniques 2.3.1 Glass texturing techniques For amorphous silicon thin-film solar cells [12] and the micromorph silicon ... and stability enhancement of laser-crystallized polycrystalline silicon thinfilm solar cells by laser firing of the absorber contacts, Solar Energy Materials and Solar Cells, 120, Part B (2014) ... Polycrystalline Silicon Thin-film Solar Cells: Paths to Better Performance, PhD thesis, The University of New South Wales, Sydney, 2011 [37] M.A Green, Limiting efficiency of bulk and thin-film silicon solar...
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temporal profile of optical transmission probe for pulsed laser heating of amorphous silicon films
Ngày tải lên :
06/05/2014, 08:54
... temperature histories for these fluences The peak temperature occurs approximately at a time of 15 ns The temperature profiles across the thickness of the silicon layer are shown in Fig for a laser fluence, ... (la) and (lb) Such changes were accounted for in the picosecond irradiation of thin c-Si films3 by assuming an average film temperature for the fitting of the measured optical properties In this ... T(x=dsi+dDt) 30 FIG Surface temperature histories for a 0.2 pm-thick amorphous silicon layer, irradiated with an excimer laser (A=O.248 pm) for laser fluences F= 19.6,31.6,46.6 mJicm’ The laser...
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Báo cáo toán học: " Interface modification effect between p-type a-SiC:H and ZnO:Al in p-i-n amorphous silicon solar cells" potx
Ngày tải lên :
20/06/2014, 20:20
... [TCO] For solar cells having a hydrogenated amorphous silicon carbide [aSiC:H] or hydrogenated amorphous silicon [a-Si:H] window layer, the use of the AZO as TCO results in a deterioration of fill ... limit the solar cell performance, the potential barrier at the front interface being one of them Since the material properties of nanocrystalline silicon differ from the amorphous silicon, its ... and some are favorable for the solar cells That is why the solar cell performance with the nc-Si as a buffer layer is much better In this paper, improvements of a-Si p-i-n solar cell with AZO as...
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Báo cáo toán học: " A novel method for crystalline silicon solar cells with low contact resistance and antireflection coating by an oxidized Mg layer" ppt
Ngày tải lên :
20/06/2014, 21:20
... comparison of different methods to determine the series resistance of solar cells Solar Energy Materials and Solar Cells 2007, 91:1698-1706 Vinod PN: Evaluation of the ohmic properties of the silver ... two step metallization of Ni/Cu for low concentrator c-Si solar cells Sol Energy Mater Sol Cells 2010, 94:2094-2101 Hörteis M, Glunz SW: Fine line printed silicon solar cells exceeding 20% efficiency ... current-voltage characteristics of solar cells Sol Cells 1981, 4:169-178 Figure A flow diagram of the processed solar cells with Mg evaporation and oxidation Figure TLM results of (a) the Mg/n-Si contact...
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