New silicon solar cells

New silicon solar cells

Recently, the University of Illinois at Urbana - Champaign (University of Illinois at Urbana-Champaign), John Rogers (John Rogers) led scientists have discovered a new high-efficiency silicon solar cell production method. This approach produced highly flexible silicon solar cells and scalability, you can roll a pencil, but also may even be as transparent windows of the building and automotive glass coloring agent.

Published in the online journal "Nature - Materials" (Nature Materials) said in a report on, you can use a new approach to traditional silicon processing, about fine crackers, cut into thin fragile silicon micro- wafer, then carefully transfer them to another extension of a flexible material surface.

Rogers, a leader in the new study, said: "We can be confused super-thin silicon wafers, can be attached to any of the plastic curl. Wafers can also be made into film or film-like, mixed with the glass in the building. This building material into the space utilization of solar energy development platform. "

As global oil prices, coupled with fears of global warming, greatly increased the demand for solar cells.

Many companies in the world, the Japanese consumer electronics manufacturers such as Sharp Corporation (Sharp Corp) and the German solar giant Q Battery Company (Q-Cells) are produced thin film solar cells, however, these thin film solar cells convert solar energy into electricity in the generally less than on the efficiency of traditional solar cells.

Rogers said that their technology is used in conventional silicon, they are "durable, high efficiency, but the current situation is too rigid and therefore seems very fragile." Rogers they adopted a method of dealing with these silicon etching. Silicon surface in a large scrape small pieces, these pieces of silicon wafers thinner than thin 10 times to 100 times, and because the small size and easier to use.

After the silicon debris scraped off with the equivalent of a "rubber stamp" of the device picks up the pieces, and then they are "printed" to the surface of other substances.

Rogers said: "These silicon debris scraped off like ink. Scraped off after the large thin pieces of silicon wafer surface to become a 'stamp pad'. Only with the 'seal' will 'stamp pad' in the silicon debris 'Indian' to other surfaces can be. "

He said that as long as the final step will be to use electronic equipment in the power of solar cells derived on it.

Improve the flexibility of silicon material makes the silicon solar cell is more lightweight, easy to carry. Rogers for the bright future of silicon solar cells will be "rolled up like a carpet can be stuffed into the truck."

He said the newly established North Carolina, Durham County, Semprius company is negotiating up the technology.

Rogers said: "We just use a different way of things we have known."

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300W portable fuel cell power

300W portable fuel cell power

Mitsubishi Gas Chemical display 300W portable fuel cell power unit power density up to 130m/Wcm2

Mitsubishi Gas Chemical Company in September 2008 10 to 12 at Tokyo Big Sight International Exhibition Center at the Fifth ECO-MAnufacture2008 (manufacturing environment and energy countermeasure development / technical session), exhibited a fuel cell portable power devices.

Built-in active mode of direct methanol fuel cell (DMFC), the output power of 300W (AC100V). 4L fuel tank can work for about 8 hours. Dimensions Width 380mm × depth 450mm × high 300mm, Dry weight of 22kg. Fuel concentration of 54% methanol solution.

Electrolyte membrane by DuPont (DuPont) the production of solid polymer membrane "Nafion", in the catalyst layer, electrodes and separators such as the formation of the self-developed technology. The shape of the fuel cell stack size is 120mm × 120mm × 125mm, 40-unit stack, heavy 3.9kg. Although the use of the sensor and pump control the reaction of the fuel supply and water recycling initiatives and other means of fuel-cell power density is as high as 130mW/cm2.

NHK Hitachi who have a similar trial of direct methanol fuel cell portable power. And in July in Hokkaido Toyako Summit in practical application of live news (see site report). Its weight is only 6kg, the output power 100W, continuous use time of two and half hours (the concentration of fuel for the 500mL 40% methanol solution).

Electric wheelchair for Suzuki

Mitsubishi Gas Chemical, said the company began many years ago and Suzuki Motor Corporation jointly promote the use of the fuel cell development for electric wheelchairs. As slow electric wheelchairs, 300W power supply can drive around. When using the original battery, users often worry about battery power, but if the use of fuel cells, you can no longer have this worry (4L fuel can travel 60km). However, there is no market, still in the feasibility study stage.

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Energy-saving environmental protection lithium battery set off craze

Energy-saving environmental protection lithium battery set off craze

With the constant fluctuations in international oil prices, energy saving environmentally friendly lithium battery in the limelight once again a hot topic. From 6 months, the number of international auto companies and electronics companies are using large-scale lithium battery joint investment. Including Toyota and Matsushita, Nissan and NEC, the public and Sanyo, Bosch and Samsung, they believe that lithium batteries in the coming years will gradually replace the nickel-metal hydride batteries, lead the direction of development of hybrid vehicles. Lithium in the heat of global investment background, Chinese automobile enterprises in this area of research is what kind of? Experts on the lithium battery is holding what kind of attitude? Recently, the reporter interviewed specifically on this issue who has studied the domestic lithium battery several experts.

Mercedes-Benz vehicles using lithium batteries technology

China's iron phosphate lithium battery research breakthrough has been made

Lin Cheng told reporters, demanding automotive lithium batteries. It requires the use of vehicles in a variety of conditions, must protect the security, there could be no fire or explosion. The first is the impetus for electric vehicle batteries, in this country has made great breakthroughs have begun to take industrial scale. But 5,6 years ago, with the battery electric vehicle accidents often occur, so the battery also gradually be diluted. Now, the domestic lithium battery research and progress rapidly, especially in the battery safety issues, has made great progress.

Lin Cheng told this reporter lithium batteries include lithium manganese oxide and lithium iron phosphate batteries. Currently, the development of the domestic lithium manganese oxide has begun to take shape. Lithium iron phosphate as higher security, longer lifetime, will become an important direction for future development of lithium batteries is also the vehicle of foreign R & D focus. At present, the domestic iron phosphate lithium battery studies are progressing well, especially in some of the patent on a breakthrough, the bus provided by the Beijing Olympic Games is to use self-developed lithium iron phosphate lithium battery.

"Of course and study abroad, compared to the lithium batteries, the domestic lithium battery research still a gap, but the country's emphasis on increasing lithium batteries, the next will be R & D focus." Lin Cheng told reporters.

Large-scale lithium batteries for electric cars need some time

Henan Huanyu Group is a battery from the battery to the plastic parts and related hardware battery manufacturing, equipment manufacturing, electronics manufacturing, a complete industrial chain of Enterprise Group, has undertaken the project of Science and Technology Li-ion battery research and development.

"At present the domestic lithium battery research and foreign, compared, the difference is mainly reflected in the cell's control system and power management systems." Deng Lun-ho right told reporters there is Guonei on battery research is at Gezi developed state. Currently, some companies have been able to provide the corresponding lithium battery electric vehicle accessory products, supporting the general lithium battery cover 200 to 500 km.

Deng Lun-ho told reporters that high prices are the domestic lithium battery, power management system problem has not yet been resolved. Charging electric vehicles also face the problem. Currently, the general line at home can not charge lithium batteries for electric vehicles to be equipped with a small charger, and charging time is very long, very troublesome. Abroad, in order to solve this problem, generally regard the charging stations and gas stations together. Domestic battery charging station is not built up a large scale.

Deng Lun-ho believes that the current consumer acceptance of electric cars with lithium batteries up there difficulty: "the price of a conventional electric vehicle is about twice the same configuration or even higher gasoline locomotives, domestic consumers have not yet sufficient economic prepared to accept the power and electric vehicles. "

Lithium iron phosphate promising prospects

The boy to reporter, electric vehicle battery research and development experience from the lead-acid batteries, nickel-hydrogen battery to the development of lithium batteries, each battery advantages and disadvantages.

Lead-acid battery to get the first, using the longest time, is battery series. The safety performance of the best lead-acid batteries, rare explosion, fire and other phenomena, but not too attractive for energy storage. Later, people developed the nickel-hydrogen batteries, storage energy and power than the effect of the ideal lead-acid batteries, but due to Ni-MH battery charging hydrogen generated in the process prone to explosion, so Ni-MH battery in business may or may not state.

To the year 2000, people have developed a lithium battery. Lithium batteries are lead-acid batteries store power for 2 to 3 times, but because it contains a lithium-ion active in the metal layer surface, prone to spontaneous combustion in the air, explosions, etc., are at higher risk. So now the main national research and development on lithium to control its security and stability.

"A rechargeable lithium battery can probably around 1000, in which storage iron phosphate lithium battery is better than lithium cobalt oxide and lithium manganese oxide effects worse, but it's the best safety performance, than the lead acid battery energy storage much higher, so now the most favored lithium iron phosphate. "the boy said.

The three problems of domestic lithium battery research

Quan-Shi Chen said in an interview: "Now the state attaches great importance to research on lithium batteries, '863 'project, the state invested 66 million yuan, all for the lithium battery research and development. We are with Japan, the United States walk in the lithium battery research and development such as the forefront of developed countries, China lithium battery manufacturing precision, equipment, standards development lags behind the details. "

Quan-Shi Chen told reporters that at present there are three issues of domestic lithium battery research. The first is the consistency of manufacture. As in lithium battery manufacturing process and equipment gaps, making the production process mixed domestic lithium battery manufacturing standards also fail to consistency. Li-ion battery electric vehicles are used in series or parallel with, if the consistency issues are not well, then the large-scale production of lithium batteries also can not be used in electric vehicles.

Second, intellectual property rights. Currently in the iron phosphate lithium battery research breakthrough has been made, but because of U.S. patents in this area, so although we have some links to independent research and development, but in intellectual property issues, but also do not know how to respond.

The third issue is the selection of raw materials. Now the raw materials used in lithium battery production can not all imported, mainly from China, but domestic raw materials, through international certification, production of the lithium battery in order to be internationally recognized, so part of the certification of raw materials still exist some problems.

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Samsung Q530 15-inch notebook with Nvidia’s Hybrid Graphics Optimus

Samsung Q530 15-inch notebook with Nvidia’s Hybrid Graphics Optimus

To save power, the GPU will be switched on only when their performance is actually needed. Otherwise, the integrated graphics on the CPU unit provides for the presentation. The Q530 is available now for 899 €.

Samsung has introduced the Q530, a 15-inch notebook with Intel Core processor and i3 Hybrid Graphics on Nvidia-based Optimus. It is available now for 899 €.

The built-Core i3-350M runs at 2.26 GHz. On board are also 802.11b/g/n 4 GB RAM (DDR3 1066 MHz), a 500-gigabyte hard disk with 5400 revolutions per minute, DVD burner and wireless after. The Ethernet interface supports only 100 Mbit / s, most laptops have Gigabit Ethernet. The reflective 15.6-inch screen dissolves to 1366 by 768 pixels.

To save energy, the Geforce 310M enabled automatically only when their performance is really needed – such as playing or converting movies. Otherwise it is at the core in the i3 integrated graphics unit, the image computation.

The 6-cell battery to allow for periods of up to five hours. As operating system Windows 7 Home Premium installed.

The Q530 weighs 2.36 pounds and measures 38.1 times 25.5 times 2.7 to 3.26 inches. Samsung offers 24 months on-site pick up service.


The Samsung Q530 is a hybrid graphics solution on Nvidia-based Optimus on board (Image: Samsung).

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Door number 19 provides for portable listening

Door number 19 provides for portable listening

Five more days until Christmas and you still need a little extra to make your gift package is complete? With today's Tip of the Advent story-news.de friends are happy - wherever you go.

There are some people who can no longer fall asleep without audio book. Many probably handled with the CD-radio on the bedside table and gropes in the dark for the buttons or annoyed about drohende voices from the great stereo.

It is also easier - and for little money. If the person receiving this gift does not accept a reasonably current phone cards with more than 2 gigabytes of memory or SD cards with the addition of HC each device. This manual should be consulted or the manufacturer are in demand. Also product reviews on the Internet Article condition often results information., It is probably also a place for an integrated memory card. Which are always cheaper - depending on the card there are 2 gigabytes starting at € 4 on the Grabbeltisch of the electronics market.

Then fit a number of audio books - such as a file of vorleser.net or as a copy of the CD. With the built-in speaker near the pillow, or (for Strahlungsangstliche) on the bedside table is provided by the phone for the bedtime story. With the headphones on the phone to stay with the audio books through the world and of course also fit a lot of music, photos and videos on such a card.

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Door number 19 provides for portable listening

The Island of the Blessed

The Island of the Blessed

Britain has so far been anything but a mecca for bargain hunters. But since the British pound weakens, look for some online purchasers from the virtual market on the island. Biggest problem: Hardly any of the vendors shipped to Germany.

€ 1.0690 for a British pound - the price was so cheap before. By comparison, now costs 100 pounds just a little more than 106 €, you had eight years ago, still paying the equivalent of 168 € for it. What the British had almost crashes into a crisis of confidence is for a German buyer of luck.

On the face of great bargains beckon on the Internet, in part, the prices are really fantastic. Apple's popular iPod Nano MP3 player costs in the 8-gigabyte memory version on the UK Amazon site converted only 109 €. This is unthinkable for German bargain hunters, even the best currently available online is 128 € including shipping yet clear about it. The only problem: Amazon sells the MP3 player to Germany.

And so unfortunately it is with most bids: most electronics, but also watches, jewelry or shoes supplies from Amazon UK only within the UK. "There the case of electronic products are usually two problems," says Damien Peachey, spokesman for the British mail order company. "Most of us allow the contracts with the manufacturers only sell the equipment in the UK. In addition, there are often problems with different national regulations on recycling. "

At least a great offer can be ordered from Germany: The gaming console Playstation 3 from Sony costs, including three games, HDMI cable and sold the equivalent of 335 € including shipping. By comparison, Amazon Germany demanded € 399.90 for the PlayStation 3 with a game - but only with one game and no HDMI cable. As is also the purchase of a Warmgeratekabels no weight to power the Playstation with electricity. Or you can use a travel adapter.

So near and yet so far: from the wide Amazon offer from England, therefore, only a small part to have in this country. Besides computer games, this is about software, DVDs, CDs and books. And that Amazon is already relatively open - hardly a British online retailers seem to transactions with European customers want to make. And so Comparisons with PriceRunner care or other search engines for more frustration than joy.

At customs is not: Since the UK is a member of the EU, there are no customs duties. The VAT will not be set off, we just paid his taxes in England. But why did the British traders find it so hard? "I suspect that the companies simply have not yet responded. In any case, the prices for mainland Europeans were too high for many years, the market has indeed emerged only with the rapid decline of the pound, "speculates the spokeswoman for the German-British Chamber of Commerce, Jana Lindner. So the British have just slept through the market?

Precise wanted to respond to this inquiry, none of the big companies. The Dixons Store Group, one of the largest technology distributors in Europe, intends to concentrate its UK brands rather on its core business in the UK. So be tailored in terms dixons.co.uk distribution network, customer service and product range to market Britain.

European customers referred to the electronics giant to its international online stores. This includes Pixmania, an online brand that has the branch in various countries, including Germany. can acquire the problem: while British buyers in Dixons or Currys Pixmania-daughters, great art bargains to be German Pixmania customers be satisfied with much higher prices.

Example iPod Nano with 8 gigabytes of storage space in yellow: British bargain hunters pay the equivalent of 102 € at Pixmania, Dixons and Currys still 107 114.20 €. In the German Pixmania shop the same model but is available only for 130 €.

The big corporations give so the favorable exchange rate does not continue to users. The bears, however, especially for smaller shops the opportunity to work with German clients to advertise low prices. And who knows, maybe fall on one or the other so at some point, as its prices have become attractive also for the mainland.

Until then, must be limited to German bargain hunters, the German portals. But here are already raising substantial savings potential. What to consider when shopping online and how to get the best price, reveals the news.de shopping guide.

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The Island of the Blessed

2009 will be significantly more expensive lawn

2009 will be significantly more expensive lawn

In the new year is much different for German drivers: Higher fines, the end for the driving license tourism and more biobased content in fuel. But that's not all - some changes in the Highway Code could come next year also.

The main change in the next year, according to the ADAC, the new Bubgeldkatalog, the 1 February will come into force. In particular, lawn, shoving, and alcohol and drug driving will be much more expensive.

If you are caught with alcohol in the future will pay 500 on first offense, the second time will be 1000 1500 and the third time due. The punishment was doubled mdamit. Speeding costs in urban areas from 2009 80-760 (previously 50-425), for speed violations outside of the city limits then the scale is 70-600. So far, the margin was 40-375. And tailgaters will have to dig deeper into their bag: Instead of the 40 and 250 euros in the next 75-400 years due.

When the changes proposed in the Road Traffic Regulations (Highway Code) to be effective is still open. The topics include: additional parking facilities for disabled people, overtaking truck in bad weather, reducing traffic and new rules for inline skaters and SegwayfahrerDer Segway is a high-tech scooter on two wheels. The driver stands on a step up from and is based on two handles. There, you can arrange the speed. Especially handy if you need to travel long distances every day, for example in large warehouses.

Even earlier, on 19 January, comes with the new license law, the final out for the driving license tourism: a foreign driving license obtained will apply not driven after the German driver's license was revoked.

In the diesel the biobased content is increased from five to seven percent by volume. Experts believe that this fuel-called B7 has no negative effects on the motor.

By 31 March 2009 must be large trucks from model year 2000 retrofitted with improved wide-angle mirror.

Newly designed passenger cars and light trucks in September 2009 will only be an approval if they meet minimum emissions standards 5a. This does not include that is not the maximum emission of carbon monoxide exceed 1000 milligrams per kilometer. At the same time, the limit for nitrogen oxides from 80 drops to 60 milligrams per kilometer. The next year also implemented the EU directive ECE R117 requires that tires are much quieter.

For vehicles with on-board diagnostic systems, from Year 2006, the emissions test will be merged with the main investigation. Year From April 2006, in the main study reviewed the additional electronics.

Who will be flashed abroad can be prosecuted, should not, unless he pays the fine. Exception is Austria, for with the neighboring country has a separate agreement. The problem is, according to ADAC rights expert Maximilian Maurer, that there are still substantial difficulties in the implementation of relevant EU decision. Now the new law will be postponed once more, which would forward traffic offenders abroad.

Caution was called for, according to Maurer yet: If you re-enter the country, there could be problems. There are even cases known where the passengers onward was prohibited until the almost-forgotten traffic fines was settled.

That occurs on 11 January 2009 the so-called Rome II Regulation in force. It spells out the law in the handling of traffic accidents is abroad. Here one has agreed on a compromise, which provides that should come in essentially the law of the State applies in which the damage occurred. Motorists must therefore inform in any case in advance of the relevant case law of the destination country.

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2009 will be significantly more expensive lawn