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    I must say that your service is absolutely exceptional and I have recommended your company and products to several friends today; all are serious "printer" people.I retired last year and my friends are all into, or are still working in the photo industry. Sincerely,Gerhard


    Dear, just to let you know than i realy appreciate your costumer service.
    Thank you


    Just a Thank you and all the best


    Ce message est simplement pour vous dire que j'ai bien reçu la commande XXXXXX et que je suis très satisfait de la rapidité de la livraison et aussi de la qualité de l'encre. C'est la première fois que j'utilise de l'encre "autre que l'originale" et pour le moment je suis très satisfait. Soyez certain que je vais vous référez à mes amis et collègues de travail et c'est certain que je vais commander à nouveau de chez vous. Merci beaucoup.


    Je veux seulement vous dire un gros merci pour la rapidité avec lequel vous avez traité ma demande et aussi pour le petit extra en papier photos,c'est très apprécié.



    I received my order, thank you for your great customer service..



    It is not often people write emails or letters of praise but consider this one of the rare ones!
    I must say, ordering your product was about the easiest imaginable. Coupled with the fact that it arrived here basically “next day” I am thoroughly happy. To tell you the truth, I was expecting to have to go pay full retail for one black cartridge thinking that your’s would take at least a week to arrive but I was wrong, the order arrived before I could even go out to get one!
    Congrats people, I WILL tell all my friends and neighbours about you!

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Inkjet printers may be the future of solar cells

The next generation of cheaper, thinner and better solar cells could come courtesy of a technology found right in our homes and offices: inkjet printers.

As their name implies, inkjet printers squirt ink onto a material, such as a paper document or the silicon of a solar cell. The well-controlled, contactless deposition of inkjetting should make possible solar cells that are half as thick, yet more efficient at, soaking up the sun’s rays than today’s industry standard.

"Inkjet is very good at putting down patterned material – anything that has a specific layout," said Maikel van Hest, a senior scientist at the National Center for Photovoltaics at the National Renewable Energy Laboratory (NREL) in Golden, Colo.

Such precision allows for the placement of thinner metallic grids on silicon solar cells that serve as collectors of sun-generated electricity. These silver "finger" strips crisscrossing solar cells measure in the 100- to 120-micrometer — or micron — range, whereas inkjet-deposited lines can be as narrow as 50 or even 20 microns, van Hest said.

The thinner contacts expose more of a solar cell’s silicon to sunlight, which translates into more electricity generation. "(These lines) mean less shadows and more light onto the solar cell," said van Hest.

Using smaller portions of the expensive, electricity-capturing contact material — silver, a precious metal, being the most common — dovetails into lower overall unit costs as well.

Plus, the silver inks used in inkjets are more conductive than the pastes applied to solar cells nowadays, resulting in more efficient harvesting of electricity.

Delicate patterning
Yet another major bonus for inkjet technology is that it is contactless – the printer apparatus itself never touches the brittle silicon wafer.

Conventional silicon solar cell manufacturing has relied on a comparatively rougher technique called screen printing – the same sort often used for making T-shirt designs, for example – since its early days in the 1970s.

With screen printing, fragility becomes a real issue for silicon wafers around 100 microns or less in height, van Hest said.

Whither inkjet?
Given these benefits, it’s surprising that inkjet printing in solar cell manufacturing has yet to be deployed commercially. But significant hurdles remain — some inherent to the technology, and others as a result of the evolution of the photovoltaic industry.

For starters, shifting to inkjet printing from screen printing will require retrofitting existing solar cell production facilities, and inkjet printing remains the more expensive process up front.

"Inkjet (printing) is always going to be more expensive than screen printing," van Hest said, "but because you use less material and get more efficiency from the solar cell, you can gain a cost advantage."

Solar panel manufacturers typically offer a 30-year warranty for their products, and for now the jury is still out on how inkjet-made components might hold up in the long run. Van Hest said NREL is doing accelerated field testing to see if there is a difference between tried-and-true manufacturing and the inkjet approach.

"Companies don’t want to risk their money going into a new technology and run into problems in the future," said van Hest.

A bright tomorrow
The continuing surge of solar cells — which as a means of electricity generation grew a hundredfold last decade, according to a 2010 report by the Renewable Energy Policy Network for the 21st Century — might start changing some industry minds, however.

Slashing the amount of silicon and silver needed per solar cell is among the most direct ways of lowering the dollar per kilowatt-hour of produced power – a shared goal of the maturing solar sector.

"Inkjet will become interesting if (silicon) wafer thicknesses go below 50 microns, versus 150 microns today for 100 percent of the market, because non-touch processes will be required," said Conrad Burke, the CEO of Innovalight, a California-based company that has developed an inkjetable ink currently used by screen printers.

Van Hest believes inkjet’s adoption will happen alongside many other emerging photovoltaic technologies, such as thin-film solar cells, and numerous other manufacturing techniques.


Conductive plastics promise to revolutionise solar cells

New plastics promise to slash the cost of key solar panel components

Danny Bradbury, BusinessGreen, 08 Apr 2010

Solar panels

Solar panel components that can be printed using technology akin to an inkjet cartridge may not be too far away from commercialisation, if a team of researchers at Princeton University have their way.

A group of scientists at the university announced last week that it has developed a way to treat plastic that will make it highly conductive for electricity after it has been moulded into different shapes.

The technique, developed by researchers at the University’s Organic and Polymer Electronics Laboratory, could be used to dramatically lower the cost of solar cells by replacing costly indium tin oxide (ITO), which has traditionally been used as a transparent conducting metal in solar panels.

The approach would also provide solar panel manufacturers with a more flexible conductive material, potentially opening the door for a wide range of new panel designs.

Conductive plastics have been available for some time, but their characteristics mean that processing them into a usable design degraded their ability to conduct electricity.

However, the Princeton researchers claim that their new production process means the plastics can be shaped without reducing their conductive capacity.

The secret to the new approach lies in the plastics being treated with an acid after they are shaped, in a process known as post-disposition solvent annealing.

"This process has enabled a wide incorporation of conducting polymers in organic electronics; conducting polymers that are not typically processable can now be deposited from solution and their productivity subsequently enhanced to practical levels via a simple and straightforward solvent annealing process, " the team said in its paper describing the process, which was published in the 8 March issue of the Proceedings of the National Academy Of Sciences in the US.

The new technique could feasibly be used to produce solar cells and other optical electronics such as flexible displays in large quantities using industrial printers.

Yueh-Lin Loo, a former assistant professor at the University of Texas, who led the research team said the approach could potentially be scaled up using mass production presses similar to those used to print newspapers.

"Being able to essentially paint on electronics is a big deal," Loo said. " You could distribute the plastics in cartridges the way printer ink is sold, and you wouldn’t need exotic machines to print the patterns."

She added that a range of other applications could be used for the technology, including medical devices that change colour according to levels of nitric oxide, which is a key indicator of ear infection in children.