1. Solar Cell Efficiency Can Increase By Embedding Quantum Dot and Tweaking the Tiniest of Parts.
Improving the efficiency of solar cells is a matter that must be done by scientists, so that electric power generated can be increased. Various ways have been done, such as creating multi-potential wells, take advantage of carbon nanotubes, and even embed nanoscale materials. Research has developed a new technology based on nanoscale materials, managed to increase the efficiency of solar cells up to 45 percent. They embed the charged quantum dot material into the solar cell. This method was successful in increasing the efficiency of solar cells. For solar cells have the opportunity to harvest the infrared light and increases the lifetime of the photoelectron. They also claim that this way can be done for many different solar cell structures. The idea of embedding quantum dots into solar cell is not new; scientists had proposed about a decade ago that this technique could improve efficiency by allowing panels to harvest invisible, infrared light in addition to visible light. However, intensive efforts in this direction have previously met with limited success. This built-in charge is beneficial because it repels electrons, forcing them to travel around the quantum dots. Otherwise, the quantum dots create a channel of recombination for electrons, in essence "capturing" moving electrons and preventing them from contributing to electric current. Researchers have developed a new, nanomaterials-based technology that has the potential to increase the efficiency of photovoltaic cells up to 45 percent. Specifically, the researchers have shown that embedding charged quantum dots into solar cells can improve electrical output by enabling the cells to harvest infrared light, and by increasing the lifetime of photoelectrons. The technology can be applied to many different photovoltaic structures. By tweaking the smallest of parts, engineers is hoping to dramatically increase the amount of sunlight that solar cells convert into electricity. Researchers have shown that embedding charged quantum dots into photovoltaic cells can improve electrical output by enabling the cells to harvest infrared light, and by increasing the lifetime of photoelectrons. Researches have not only successfully used embedded quantum dots to harvest infrared light; they have taken the technology a step further, employing selective doping so that quantum dots within the solar cell have a significant built-in charge.
2. Silicon Nanorods Could Increase Solar Cell Efficiency, Cut Cost
Picosun Oy, a global Atomic Layer Deposition (ALD) equipment manufacturer based in Finland, reported the final results of a multinational three-year research project aimed at pioneering nanomaterials that would make thin-film solar cells much more efficient and cheaper to manufacture. It led to energy conversion efficiencies of greater than 9%, with good long-term cell stability. The new silicon nanorod-based concept requires significantly less active photovoltaic material by growing light-trapping nanorod on cheaper substrates, such as glass or flexible foils.
Because these densely packed tiny silicon columns are three-dimensional, their active surface area is much larger. In addition, the location of the p-n junction is much closer to the surface than in conventional solar cells, which improves the minority carrier charge transport and, therefore, the amount of electricity that can be extracted from the cell. To prevent recombination losses in the active photovoltaic layer, the nanorods were coated with a passivation barrier. Picosun concludes that silicon nanorod cell concept shows promising potential for increasing the efficiencies of thin film solar cells and reducing manufacturing costs. As might be expected, the Finnish company is “especially satisfied.” The technology used in ROD-SOL to create the more efficient thin-film solar cells is still very new and might require some time and further development to go commercial.
3. Using virus to increase solar-cell efficiency
Researchers at MIT claim to have increased the power-conversion efficiency of solar cells by nearly one-third through the use of tiny viruses to perform detailed assembly work at the microscopic level. The MIT research is based on the finding that carbon nanotubes can enhance the efficiency of electron collection from a solar cell's surface. The researchers used genetically engineered version of a virus called M13, which normally infects bacteria, to control the arrangement of the nanotubes on a surface. Doing so keeps the tubes separate so they can't short out the circuits and keeps the tubes apart so they don't clump -- two problems that have plagued previous attempts to use carbon nanotubes in solar cells. The system the researchers tested used a type of solar cell known as dye-sensitized solar cells, a lightweight and inexpensive type where the active layer is composed of titanium dioxide (TiO2), rather than the silicon used in conventional solar cells. MIT pointed out that the same techniques could be applied to other types of solar cells, including quantum-dot and organic solar cells. In tests, adding the virus-built structures enhanced the power-conversion efficiency to 10.6% from 8%, almost a one-third improvement. This efficiency improvement is achieved even though the viruses and the nanotubes make up only 0.1% by weight of the finished cell. The viruses are used to help improve one particular step in the process of converting sunlight to electricity: funneling electrons toward a collector, from which they can form a current that flows to charge a battery or power a device. According to MIT, the viruses perform two different functions. First, they possess short proteins called peptides that can bind tightly to the carbon nanotubes, holding them in place and keeping them separated from each other. In addition, the virus was engineered to produce a coating of TiO2, a key ingredient for dye-sensitized solar cells, over each of the nanotubes. The two functions are carried out in succession by the same virus, whose activity is "switched" from one function to the next by changing the acidity of its environment. This switching feature is an important new capability that has been demonstrated for the first time in this research. In addition, the viruses make the nanotubes soluble in water, which makes it possible to incorporate the nanotubes into the solar cell using a water-based process that works at room temperature. Solar cells have already been commercialized in Japan, Korea, and Taiwan. If the addition of carbon nanotubes via the virus process can improve their efficiency, the industry is likely to adopt such processes, solar experts believe. Because the process would just add one step to a standard solar-cell manufacturing process, it should be easy to adapt existing production facilities and should be possible to implement relatively rapidly.
3. Using virus to increase solar-cell efficiency
Researchers at MIT claim to have increased the power-conversion efficiency of solar cells by nearly one-third through the use of tiny viruses to perform detailed assembly work at the microscopic level. The MIT research is based on the finding that carbon nanotubes can enhance the efficiency of electron collection from a solar cell's surface. The researchers used genetically engineered version of a virus called M13, which normally infects bacteria, to control the arrangement of the nanotubes on a surface. Doing so keeps the tubes separate so they can't short out the circuits and keeps the tubes apart so they don't clump -- two problems that have plagued previous attempts to use carbon nanotubes in solar cells. The system the researchers tested used a type of solar cell known as dye-sensitized solar cells, a lightweight and inexpensive type where the active layer is composed of titanium dioxide (TiO2), rather than the silicon used in conventional solar cells. MIT pointed out that the same techniques could be applied to other types of solar cells, including quantum-dot and organic solar cells. In tests, adding the virus-built structures enhanced the power-conversion efficiency to 10.6% from 8%, almost a one-third improvement. This efficiency improvement is achieved even though the viruses and the nanotubes make up only 0.1% by weight of the finished cell. The viruses are used to help improve one particular step in the process of converting sunlight to electricity: funneling electrons toward a collector, from which they can form a current that flows to charge a battery or power a device. According to MIT, the viruses perform two different functions. First, they possess short proteins called peptides that can bind tightly to the carbon nanotubes, holding them in place and keeping them separated from each other. In addition, the virus was engineered to produce a coating of TiO2, a key ingredient for dye-sensitized solar cells, over each of the nanotubes. The two functions are carried out in succession by the same virus, whose activity is "switched" from one function to the next by changing the acidity of its environment. This switching feature is an important new capability that has been demonstrated for the first time in this research. In addition, the viruses make the nanotubes soluble in water, which makes it possible to incorporate the nanotubes into the solar cell using a water-based process that works at room temperature. Solar cells have already been commercialized in Japan, Korea, and Taiwan. If the addition of carbon nanotubes via the virus process can improve their efficiency, the industry is likely to adopt such processes, solar experts believe. Because the process would just add one step to a standard solar-cell manufacturing process, it should be easy to adapt existing production facilities and should be possible to implement relatively rapidly.
Solar Air Conditioner Wall Mounted DC Inverter Series
12000btu
prices??????????.....mode of payment thru?????wat???western or moneygram ?
how much the price the solar air conditioner wall mounted DC INVERTER series..Range of 9000btu, 12000btu Energy saving upto 70%.......in dollar.......im here in the Philippine..manila
Dear sir,
We are pleased to contact you about our interest to purchase your product.
We have demand of this product at the time being, is a project for a local private company from Mali, western Africa.
We need 12000Btu, for multiple containers. If the quotation is acceptable, we will need one complete unit, with all it's components and pay you the cost as well as the air freight cost you send it from your place, once it arrive at the destination they will check if everything is fine and satisfied them, then we will place the order. Hopefully to get your feedback soon.
Regular base.
Awaiting your feedback ASAP
Rgds
Mr Gassama
Brothers link HK intl co ltd
Guangzhou branch china
Tel 02029130892
Mobile 18620046934
Skype dadaforce
QQ 2488564439?
Sent from my iPad
what is the mini home solar system how it work and price list
thank you
please i need like a 40 feet container of air condition wall mounted
9000 btu 12000 btu and 2000 btu, to beirut lebanon,,i need price list F O B thank you...
Can you please send me prices for these units.
THANK YOU.
Hello,
my name is Jeff, i would like to know about your prices and prudocts, i have a store that seels AIR CONDITIONING units, and i would like to seel your prudoct too, as a representative. My store is in Puerto Vallarta, Jalisco, Mexico.
Please contact me with your best price list.
MINI SPLITS, MULTI SPLITS, PORTABLES of 12K BTU.
12k BTU
18K BTU
24K BTU
36K BTU
THANK YOU VERY MUCH.
JEFF ANDRADE
Operational Manager
POLARKIT VALLARTA
April, 2012
Sirs:
We are a Company dedicated since 1998 to Humidification and Air Conditioning markets in Mexico, located in Mexico City.
We need information about your products for air conditioning applications, especially in Mini and Multi Split equipment.
In addition to technical information need prices, deliveries, terms, guarantee and information you consider of interest for us.
We give to our customers complementary services as maintenance, technical support, design and equipment selection, installation, and additional help in adequate solutions to change old equipment for new one to reduce energy consumption and operating costs.
At present we are needing the following equipment:
5 Mini Split for 12,000 BTU
2 Mini Split for 24,000 BTU
1 Mini Split for 36.000 BTU
Can be supplied in Multi Split arrangement: 2 evaporative 12,000 BTU and 1 evaporative 24,000 BTU with one condenser unit (two sets); 1 evaporative 12,000 btu alone with condenser; 1 evaporative 36,000 btu alone with condenser.
Waiting with much interest your reply
Hugo Brassel
Humiditec SA CV
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