Posts Tagged ‘solar’

Thin-film silicon solar cells

February 5th, 2010

Thin-film silicon solar cells

Mitsubishi Heavy Industries panasonic cgr-s602e battery, the open tandem thin-film silicon solar cell technology and production planning

Mitsubishi Heavy Industries, the open in the second quarter of 2007 volume production of the external dimensions of 1.4m × 1.1m tandem thin-film silicon solar cell technology (Speaker Number: 3DP.2.4 “The Worlds Largest a-Si/mc-Si Tandem Module Production” ). 1.4m × 1.1m of this size in the mass production of tandem thin-film panasonic dmw-bm7 battery silicon solar cells for the world’s largest.

In the non-crystalline silicon and overlapping micro-crystalline silicon thin-film silicon tandem solar cell structure, the film thickness to 2μm above the micro-crystalline silicon film-forming speed is crucial. Mitsubishi Heavy Industries, micro-crystalline silicon film panasonic dmw-bca7 battery in order to improve the speed, using a 60MHz frequency through the imposition of a means to generate the plasma. 13.56MHz available when this film 10 times the speed.

However, with the floor area increases, the uneven distribution of topics such as plasma also be constituted. To this end, Mitsubishi Heavy Industries has developed at the same time in the phase modulation imposed by 60MHz frequency PMM (Phase Modulation Method) technology, which obtained a 1.4m × 1.1m of the floor stable, high-speed formation of micro-crystalline silicon results. Micro-crystalline silicon film achieved a speed of 2.3nm / s, available in volume production line in 3 minutes a frequency of manufactured products thinkpad t60 Battery. The current module conversion efficiency in achieving stabilized after 9.5% or so. In order to achieve 10.4% of the goal, the company is to continue to improve.

Mitsubishi Heavy Industries announced the Lenovo IBM thinkpad t60 Battery release of this future production plans. At present, the company’s tandem thin-film silicon solar cell capacity of an annual output of 40MW. The future plans to increase this capacity to 50MW, combined with the second quarter of 2007 started construction of the annual output of 50MW of new factories, and strive to achieve during the year 2008 annual 100MW. Because the non-crystalline silicon solar cell production capacity has also been improved, so the company’s solar cell production capacity will be combined to reach an annual output of 128MW. In addition, the company also plans to build new factory the size of an annual output of 100MW. However, to achieve this goal, still faces shortages of experienced Apple PowerBook G4 AC Adapter technical problems which require a variety of passing through acquisitions to be addressed.

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Low-cost solar photovoltaic cells

February 5th, 2010

Low-cost solar photovoltaic cells

Israel’s Bar Ilan University dell inspiron 6000 battery nanotechnology expert has developed a new type of low-cost photovoltaic cells, the photoelectric conversion rate of traditional silicon solar cells are equivalent, but cost can be reduced by 40%%.

Such photovoltaic cells is the use of nano-technology design, and distributed in the plastic plate by sponge-like micro-nano-dot matrix composed of glass installed in the conductive metal wire constitute a fundamental part. In order to enhance the ability to absorb sunlight, the researchers injected to the semiconductor materials dell inspiron 1545 battery, organic dye inside.

Bar Ilan University, Nanotechnology Zabban Professor Director of the Institute, initially they have developed photovoltaic panels photovoltaic cells by small matrices, each photovoltaic film is only one square centimeters, due to photovoltaic films is small, the space between the plate and sheet and more sunlight in the above can not be converted into electrical energy, the conversion efficiency is relatively low. In view of this situation, they will each light the area of dell inspiron 1525 battery solar cells increased to 100 square centimeters, the photovoltaic cell matrix markedly enhanced the ability to capture the sun.

Zabban professor said that in the solar energy research and development, the cost is an important factor. To make solar cells are widely accepted to be its production cost is lower than conventional fossil fuels, while the infrastructure cost and allowing developing countries to accept them. Their results of this study can effectively dell latitude d520 battery reduce the cost of photovoltaic cells for solar cells occupy a much broader market to open up the road. In addition, he is also studying the reduction of platinum use of solar cells in order to further reduce costs.

At present, the Jerusalem a solar energy company is working with the Bar Ilan University thinkpad t60 Battery , promoting the commercialization of solar photovoltaic cells. They hope that the next five years, photovoltaic cells can enter the market successfully.

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Silica nanoparticles and solar cells

February 3rd, 2010

Silica nanoparticles and solar cells

Scientists digital camera battery have been working to find better materials and methods to create high-performance solar cells. U.S. scientists, a new study found that in silicon solar cells formed on the surface layer of silicon nanoparticle films can enhance the ability of its energy conversion and reduce the battery’s own heat and prolong life. Relevant papers will be published in “Applied Physics Express” (Applied Physics Letters) on.

The study was conducted by physicists at the University of Illinois Munir Nayfeh leadership, mainly targeted at the ultra-violet absorption and transformation. In terms of traditional solar cells, ultraviolet light leaking out of line either directly or by absorption of silicon devices, but it is converted into heat instead of electricity, which may affect the service life. In 2004, published in the “Photonics Technology Letters” (Photonics Technology Letters) in a study, Nayfeh confirmed that the UV lines with the appropriate nano-scale particles kodak klic-5001 effectively combined to produce electricity.

In order to achieve practical results, Nayfeh and his colleagues conducted a new study. They first use its own developed a proprietary technology to larger silicon switch is made of discrete nano-scale particles, they will be issued in different colors of fluorescence. Then, the researchers of these particles dispersed in isopropyl alcohol and wipe the surface of the solar cell. When the alcohol evaporates, the surface of the battery will eventually form a tight layer of nano-granular films.

The researchers found that if the solar cells covering the surface is the thickness of 1 nm blue fluorescent nano-particles thin-film, the entire cell will be able to transform more than 60% of the UV lines, but the visible light, the conversion rate of increase less than 3%. However, if the battery is the thickness of the surface covered by 285 nm red fluorescent particle film, then the ultraviolet ray kodak klic-7001 can increase the conversion rate of 67%, while the enhancement of visible light can reach 10%.

Nayfeh that the performance of solar cells such improvements should be more attributed to the improvement of the battery voltage rather than current. He said, “Our study conclusions indicate that charge transfer within the thin film and nano-particle interface, the importance of the amendment.”

Nayfeh said that the new coating process can easily incorporated into the current solar cell manufacturing process, while the costs are not an additional increase.

Nokia intends to be completed end of this year recovery plan for bad batteries

Nokia Corporation (Nokia Corp.) Spokesman Marianne Holmlund said the kodak klic-7004 company plans to complete its year-end 2007, the battery restoration program. The company currently too much heat is being replaced with 4,600 million cell phone batteries.

According to “Nihon Keizai Shimbun” (Nikkei) reported, Holmlund said, Nokia is working with Matsushita Electric Industrial Co., Ltd. (Matsushita Electric Industrial Co.) Cooperation to ensure that problems with lithium batteries can be repaired as soon as possible. Those batteries from Matsushita Battery Co., Ltd. (Matsushita Battery Industrial Co.) Manufacturing.

The Finnish mobile phone giant has released the battery product advice, because of the problems these batteries overheating while charging the battery itself, leading to deformation. Nokia insists that this is not a serious injury due to battery overheating carried back to the response, but consumers demand the product should be replaced.

Holmlund said that Nokia batteries to fix all problem is very difficult, like the call back to the car and computer parts products, fixed rates are usually 30% or less.

If the battery is low repair rate, Nokia is likely to consider continuing the Dell Latitude D510 Battery in 2007 after the rehabilitation program.

Holmlund did not indicate the cost of replacement batteries. Once the battery is expected to identify the cause of the malfunction, Nokia and Panasonic will be sharing costs.

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Carbon nanotubes bring a new dawn for solar cells

October 9th, 2009

 

Carbon nanotubes bring a new dawn for solar cells

U.S. scientists have used carbon nanotubes to produce new type of solar cells to absorb the same amount of photons can produce more light under the current, its efficiency will be superior to the current PV Laptop battery cells. They prove that carbon nanotubes made of light emitting diode (photodiode) absorbs a photon can generate multiple electron-hole pairs (electron-holepair), unlike the conventional LED can only produce one group. Cornell University NathanGabor involved in the study, said the technology, if applied to large-size solar cell conversion efficiency is bound to break away from restrictions.

  The current PV Latitude D610 battery cells absorb a photon of each produce at most a group of electron-hole pairs, however, Cornell University research team led by PaulMcEuen using single-walled carbon nanotubes made of photovoltaic Latitude D620 battery cells, breaking this restriction. This device consists of approximately 3 ~ 4μm, ranging from 1.5 ~ 3.6nm diameter carbon control into the carbon tubes are placed on an insulating substrate between the electrodes, the electrode bias is applied, the electrodes of the carbon nanotubes to form a pn junction light emitting diode.

  The researchers irradiated by laser light emitting diode, while the carbon tube is applied to reverse bias Acer Aspire One battery , and to monitor the photocurrent. The results at temperatures lower than 90K and the reverse bias current is applied and when the child was observed more heavy generation. As this bias increases, the current was step-like increase Aspire 3000 battery. If the sub-raising incident light energy, the current ladder will be widened.

  Usually a photon can only be an electronic excitation up a sub-band, Cornell Panel finds that the generation of multiple electron-hole pairs is due to photons to provide carbon nanotube electronics a lot more energ of XPS m140 BATTERY, making a second or more of the electronic energy band is also diode can move and inspire other electronics, and when the second band of the carrier to obtain enough energy to stimulate additional electronic time, the resulting change in current occurs ladder.

    Gabor pointed out that the second energy band implies the presence of threshold used up almost all of the above-mentioned process of the remaining photon energy, coupled with the Pavilion DV1000 battery energy of the electric field, along with a single electron is used to convert multi-electron, which for the achievement of high performance solar cells The ultimate goal is important, because the latter is almost 100 percent in the pursuit of the light used to stimulate electron-hole pairs.

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