Search Results
Results 501 - 550 of 975
< 6 7 8 9 10 11 12 13 14 15 16 >
Li, Chang M.
This report covers investigations of advanced microbial H2/O2-fuel cell development, miniaturization, and energy and power density enhancement. The anode is very important in the performance of a microbial fuel cell "MFC", and is often the limiting factor for a high power output. In present work, we used the CNT/PANI composite ...
Minteer Shelley D - - 2007
Enzyme-based biofuel cells possess several positive attributes for energy conversion, including renewable catalysts, flexibility of fuels (including renewables), and the ability to operate at room temperature. However, enzyme-based biofuel cells remain limited by short lifetimes, low power densities and inefficient oxidation of fuels. Recent advances in biofuel cell technology have ...
Schadow, Klaus
Materials that are produced on the nanoscale have the promise for increased performance for energetics (such as propellants and explosives) and power generation devices (such as batteries and fuel cells and hydrogen storage).
Quist, P.A.C.
Because of an increasing need for energy, exhaustion of conventional energy sources and pollution of the environment, the development of renewable energy supplies becomes increasingly important. Solar cells can play an important role to meet these demands, since they can directly convert solar light into electricity. Conventional solar cells have ...
Yong P - - 2007
Biosynthesis of nano-scale platinum and palladium was achieved via enzymatically-mediated deposition of metal ions from solution. The bio-accumulated Pt(0) and Pd(0) crystals were dried, applied onto carbon paper and tested as anodes in a polymer electrolyte membrane (PEM) fuel cell for power production. Up to 100% and 81% of the ...
Gur Ilan - - 2007
In recent years, the search to develop large-area solar cells at low cost has led to research on photovoltaic (PV) systems based on nanocomposites containing conjugated polymers. These composite films can be synthesized and processed at lower costs and with greater versatility than the solid state inorganic semiconductors that comprise ...
Jian Zahn
As a new technology, in the solar cell field the dye-sensitized solar cell (DSSC) gives a technically and economically viable idea to develop the solar cell technology. Compared with conventional silicon solar cells, where the semiconductor assumes light absorption. The use of sensitizers have a broad absorption bandgap with semiconductor ...
Yu, Donggang
In this paper, some new and efficient algorithms are described for dynamic analysis and recognition of cell-cycle screening based on morphological structures. The series of morphological structural points are described. The morphological structural models are approached, and they can be used for shape analysis and recognition of different cell phases.
Fan-Tai Kong
We introduced the structure and the principle of dye-sensitized solar cell (DSC). The latest results about the critical technology and the industrialization research on dye-sensitized solar cells were reviewed. The development of key components, including nanoporous semiconductor films, dye sensitizers, redox electrolyte, counter electrode, and conducting substrate in dye-sensitized solar ...
Joanna Prazmowska
Double gallium arsenide quantum wells (2QW) were inserted within Al<sub><em>x</em></sub>Ga<sub>1&ndash;<em>x</em></sub>As barriers of the intrinsic layer of an ordinary solar cell. Structure parameters have strong influence on device performance and should be precisely controlled in order to obtain the enhancement of conversion efficiency. Computer simulations of solar cells were carried out ...
Joanna PRAZMOWSKA
In order to enhance the conversion efficiency of GaAs <em>p</em>-<em>i</em>-<em>n</em> solar cells GaAs/Al<sub><em>x</em></sub>Ga<sub>1&ndash;<em>x</em></sub>As QW within intrinsic region or gradation of Al fraction of Al<sub><em>x</em></sub>Ga<sub>1&ndash;<em>x</em></sub>As emitter and base region were applied. The influence of AlAs Bragg reflectors on the performance of MQWSC was studied theoretically by using SimWindows software.
Kiviaho, Jari
Journal of Fuel Cell Science and Technology Vol.4 Nr.4, 392 - 396
Strümpel, Claudia
Within this thesis erbium-doped up-converters have been characterized and applied to silicon solar cells. An up-converter absorbs at least two low energy photons and converts them to one high energy photon and therefore, when applied to the rear of a bifacial solar cell, may lead to a spectral response beyond ...
Green, M.A.
Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines for inclusion of results into these tables are outlined and new entries since June 2006 are reviewed.
Lungenschmied, C.
We report herein large area (>10 cm2), interconnected organic solar cell modules both on glass substrates as well as on flexible ultra-high barrier foils, reaching 1.5% and 0.5% overall power conversion efficiency under AM1.5 conditions. Series connection is described, as these modules consist of up to three cells. Using our ...
Green, M.A.
Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines for inclusion of results into these tables are outlined and new entries since January 2007 are reviewed.
Schmich, E.
This paper presents a low cost application of high-temperature silicon CVD depositions for photovoltaics. Crystalline silicon thin-film (cSiTF) solar cells could be an attractive alternative to bulk silicon solar cells. At Fraunhofer ISE we follow the concept of an epitaxial wafer equivalent (EpiWE), where 20 mu m of silicon are ...
Stelter, M.
SOFC (solid oxide fuel cell) technol. has reached a level of maturity at which commercialization can be started. Current product concepts focus on stationary small-scale combined heat and power (CHP) or mobile auxiliary power units (APU). The high operating temp., broad choice of fuels, and cost-effective materials give SOFCs an ...
Dimroth, F.
The efficiency of a solar cell can be increased by stacking multiple solar cells with a range of bandgap energies, resulting in a multijunction solar cell with a maximum theoretical efficiency limit of 86.8%. III-V compound semiconductors are good candidates for fabricating such multijunction solar cells for 2 reasons: they ...
Michaelis, A.
Small SOFC (solid oxide fuel cell) and PEM (polymer electrolyte membrane) fuel cells systems have reached a promising level of maturity. The authors report on development of different ceramic technologies and materials that allow for cost effective fabrication of components such as robust electrochemical MEA's (membrane electrode assemblies), glass seals ...
Zimmermann, B.
Organic solar cells have the potential to make cheap photovoltaic devices feasible. In order to achieve this, material and production costs have to be minimised by using device architectures, which are suited to tap the full potential of reel-to-reel production. The inversion of the layer sequence in organic bulk-heterojunction solar ...
Slooff, L.H.
One of the major loss mechanisms in state of the art photovoltaic cells is spectral loss resulting from inefficient use of ultraviolet photons and the lack of absorption of infrared photons by the solar cell. For a Si solar cell, e.g., spectral losses alone result in over 55% loss of ...
Beck Kenneth H - - 2007
INTRODUCTION: The purpose of this investigation was to identify risky driving behaviors and dispositions that distinguish drivers who use a cell phone while operating a motor vehicle from non-cell phone using drivers. METHOD: Annual telephone surveys were used to identify drivers who reported using a cell phone while driving in ...
Myong Seung Y - - 2007
Thermalization of photogenerated carriers in bulk materials is the main bottleneck for the conversion efficiency of conventional inorganic solar cells. Furthermore, despite extensive research, the achieved conversion efficiency is nearly saturated during the last decade. Therefore, new device concepts to break through the efficiency barrier are highly requested. Nanotechnologies are ...
Santa-Nokki Henriette - - 2007
A new dye-sensitized solar cell driven electrochromic device has been fabricated. The device consists of an electrochromic display and a solar cell in a single nanocrystalline film. The optimization of the electrochromic and the solar cell functions was carried out. An applied potential of 1.0 V was required for coloring ...
Sung, Woosuk
A primary goal of this work is to develop a novel liquid-based microscale fuel cell using non-noble metal catalysts. The developed fuel cell is based on a membraneless structure. The operational complications of a proton exchange membrane lead the development of a fuel cell with the membraneless structure. Non-noble metals ...
Shi Qingmin - - 2006
We propose a novel Persistent OcTree (POT) indexing structure for accelerating isosurface extraction and spatial filtering from volumetric data. This data structure efficiently handles a wide range of visualization problems such as the generation of view-dependent isosurfaces, ray tracing, and isocontour slicing for high dimensional data. POT can be viewed ...
Torrey, J. M.
Fuel cells are an environmentally clean, quiet, and a highly efficient method for generating electricity and heat from natural gas and other fuels. In fiscal year 1993 (FY93), the Engineer Research and Development Center, Construction Engineering Research Laboratory (ERDC-CERL) was assigned the mission of managing the DOD Fuel Cell Demonstration ...
Oh Seunghan - - 2006
Vertically aligned yet laterally spaced nanoscale TiO2 nanotubes have been grown on Ti by anodization, and the growth of MC3T3-E1 osteoblast cells on such nanotubes has been investigated. The adhesion/propagation of the osteoblast is substantially improved by the topography of the TiO2 nanotubes with the filopodia of growing cells actually ...
Kopidakis Nikos - - 2006
The mechanism by which the adsorbent guanidinium affects the open-circuit photovoltage of dye-sensitized TiO2 nanocrystalline solar cells was investigated. The influence of the guanidinium cation on the rate of recombination and band-edge movement was measured by transient photovoltage. When guanidinium is present in the electrolyte recombination becomes slower by a ...
Vo, Anh Quan
In this thesis, we investigated the effect of some factors on degradation of the solar cell dye N719 with laser light. The anatase/rutile ratio of TiO2, oxygen amount and other types of TiO2 was studied on degradation of N719. Dark degradation of N719 was also investigated. We also tried some ...
Xiang J H - - 2006
Zinc oxide nanocrystalline sheets were self-assembled on a flexible polymer substrate to act as the electrode of dye-sensitized solar cells by an in situ-construction electrodeposition process. It was discovered that the nanosheet-based solar cell exhibited better performance than a nanoparticle-based solar cell or a well-oriented nanowire-based solar cell. The nanosheet ...
Doyle Derek - - 2006
William Hewson has been called the father of haematology. Initially working alongside the Hunter brothers in London in the mid-18th century, he advanced our knowledge of red and white cells (but mistakenly thought some red cells started as white cells and could not recognise different varieties of white corpuscles), showed ...
Barabanova S V - - 2006
The number of hypothalamic IL-2-containing cells changed in rats receiving Vilon and Epithalon during mild stress (handling). The number of IL-2-positive cells in hypothalamic structures decreased 24 h after intramuscular injection of Epithalon and 2 h after intranasal administration of the test peptides. Adaptation of animals to experimental conditions prevented ...
McGarva Andrew R - - 2006
Using 2 field procedures, the authors assessed impacts of cell-phone use on mild forms of driver aggression. Participants were 135 drivers traveling within a city of approximately 17,000 people in an otherwise little-populated region of western North Dakota. The authors videotaped the participants while a confederate driver in a low-status ...
Mora-Seró Ivan - - 2006
Four different types of solar cells prepared in different laboratories have been characterized by impedance spectroscopy (IS): thin-film CdS/CdTe devices, an extremely thin absorber (eta) solar cell made with microporous TiO2/In(OH)xSy/PbS/PEDOT, an eta-solar cell of nanowire ZnO/CdSe/CuSCN, and a solid-state dye-sensitized solar cell (DSSC) with Spiro-OMeTAD as the transparent hole ...
Chamberlin, Charles E.
Presented at the 2002 Fuel Cell Seminar, Palm Springs, CA, November 2002
Townsend Michael - - 2006
Unlike many similar countries, New Zealand has no specific legislation restricting the use of cell phones in vehicles. Several factors suggest that legislation may be introduced in the near future. This study provided a benchmark for current cell phone use among motorists. A total of 8,700 drivers of cars were ...
Ju Xiumin - - 2006
A conventional fuel cell was used as a catalytic reactor to treat soil vapor extraction (SVE) gases contaminated with trichloroethylene (TCE). The SVE gases are fed to the cathode side of the fuel cell, where TCE is reduced to ethane and hydrochloric acid. The results obtained suggest that TCE reduction ...
Koster, L.J.A.
Bimolecular recombination in organic semiconductors is known to follow the Langevin expression, i.e., the rate of recombination depends on the sum of the mobilities of both carriers. We show that this does not hold for polymer/fullerene bulk heterojunction solar cells. The voltage dependence of the photocurrent reveals that the recombination ...
Jilian Nei de Freitas
We present recent results on solid-state dye-sensitized solar cell research using a polymer electrolyte based on a poly(ethylene oxide) derivative. The stability and performance of the devices have been improved by a modification in the method of assembly of the cells and by the addition of plasticizers in the electrolyte. ...
880-01 Sheng-Yang, Huang
Thesis (Ph.D.)--National Tsing Hua University Chemistry
Noponen, Matti
Journal of Fuel Cell Science and Technology Vol.3 Nr.4, 438 - 444
Vinke, Izaak C.
Lucerne Fuel Cell Forum 2006 (EFCF 2006). Lucerne, Switzerland, 3 - 7 July 2006. Conference CD
Halme, Janne
Solar Energy Materials and Solar Cells Vol.90 Nr.7 - 8, 887 - 899
Glunz, S.W.
This paper gives an overview about recent activities in the industrial application of high-efficiency monocrystalline silicon solar cells. It also presents the latest results achieved at Fraunhofer ISE, especially a new patented process for the formation of back-contact points on dielectrically passivated cells called laser-fired contacts and its application to ...
Brauer, Elizabeth
This paper presents a regular layout fabric made of via-programmable MCML universal logic cells for structured ASIC applications and the associated design flow. The proposed structured ASIC fabric offers high speed operation, very high noise immunity, as well as low production cost due to the via-programmable properties of the universal ...
Badel, Stéphane
This paper presents a regular layout fabric made of via-programmable MCML universal logic cells for structured ASIC applications and the associated design flow. The proposed structured ASIC fabric offers very high noise immunity due to the differential operation, as well as low production cost due to the via-programmable properties of ...
Sastrawan, Ronald
Photovoltaic modules of dye solar cells of size 30x30 cm² were developed. Additionally, module-relevant processes in dye solar cells have been examined. These included the behaviour under partial shading and the photoinduced electrophoresis. The module design was optimized and a design with meander shaped cells was realized. Long term tests ...
< 6 7 8 9 10 11 12 13 14 15 16 >