energi terbarukan: KERTAS sel surya … 120711

Membuat Sel Surya di Atas Kertas
Tri Wahono | Selasa, 12 Juli 2011 | 13:53 WIB

KOMPAS.com — Para peneliti di Massachusetts Institute of Technology berhasil menciptakan teknologi pembuatan panel surya yang bisa dicetak di selembar kertas. Perkembangan ini membuat pembuatan panel surya lebih murah dan mudah.

Panel surya dari kertas ini cukup kuat walaupun telah dilipat menjadi mainan pesawat terbang. Selain itu, panel surya yang fleksibel tersebut dapat diisi ulang saat terkena cahaya matahari.

Proses pencetakan menggunakan uap, bukan cairan. Penggunaan suhu kurang dari 120 derajat Celsius memungkinkan penggunaan kertas, plastik, atau kain biasa sebagai wadah panel surya.

Peneliti mengatakan, “Panel dari kertas ini menjadi sebuah terobosan yang dapat mengurangi biaya produksi dalam pembuatan panel surya. Biayanya hampir seperseribu biaya panel yang terbuat dari kaca.”

Peneliti mengatakan, sel surya yang dicetak di atas kertas ini masih dalam tahap uji coba, efisiensinya masih sekitar 1 persen.

Profesor Teknik Elektro Vladimir Bulovic yang turut serta dalam penelitian ini mengatakan, walaupun efisiensi masih sangat kecil, panel ini sudah bisa menggerakkan alat-alat kecil. “Saya yakin, dalam waktu dekat kami akan menyempurnakan panel surya fleksibel ini,” ujarnya. (National Geographic Indonesia/Arief Sujatmoko)

May 5, 2010 6:19 AM PDT
MIT researchers print solar cell on paper
by Martin LaMonica

CAMBRIDGE, Mass.–Scientists at the Massachusetts Institute of Technology have successfully coated paper with a solar cell, part of a suite of research projects aimed at energy breakthroughs.

Susan Hockfield, MIT’s president, and Paolo Scaroni, CEO of Italian oil company Eni, on Tuesday officially dedicated the Eni-MIT Solar Frontiers Research Center. Eni invested $5 million into the center, which is also receiving a $2 million National Science Foundation grant, said Vladimir Bulovic, the center’s director.

The printed solar cells, which Bulovic showed at a press conference Tuesday, are still in the research phase and are years from being commercialized.

However, the technique, in which paper is coated with organic semiconductor material using a process similar to an inkjet printer, is a promising way to lower the weight of solar panels. “If you could use a staple gun to install a solar panel, there could be a lot of value,” Bulovic said.

Vladimir Bulovic, director of the Eni-MIT Solar Frontiers Research Center, holds a solar cell printed onto a piece of paper to spell MIT. This is the first paper solar cell, according to MIT and Eni.
(Credit: Martin LaMonica/CNET)

The materials MIT researchers used are carbon-based dyes and the cells are about 1.5 percent to 2 percent efficient at converting sunlight to electricity. But any material could be used if it can be deposited at room temperature, Bulovic said. “Absolutely, the trick was coming up with ways to use paper,” he said.

MIT professor Karen Gleason headed the research and has submitted a paper for scientific review but it has not yet been published. MIT and Eni said this is the first time a solar cell has been printed on paper.

During the press conference, Scaroni said that Eni is funding the center because the company understands that hydrocarbons will eventually run out and believes that solar can be a replacement. At the same time, he said, current technologies are not sufficient.

“We are not very active (in alternative energy) today because we don’t believe today’s technologies are the answer of our problems,” he said.

Quantum dots
The paper solar cells are one of many avenues being pursued around nanoscale materials at the Eni-MIT Solar Frontiers Center. Layers of these materials could essentially be sprayed using different manufacturing techniques to make a thin-film solar cell on a plastic, paper, or metal foils.

Silicon, the predominant material for solar cells, is durable and is made from abundant materials. Many companies sell or are developing thin-film solar cells, which are less efficient but are cheaper to manufacture.

Read more: http://news.cnet.com/8301-11128_3-20004170-54.html#ixzz1RsIdW6uE
July 11, 2011 12:16 PM PDT
MIT demos flexible solar panels printed on paper
by Tim Hornyak

Powerful enough to run small devices, MIT’s paper solar panels can even be printed on newspaper.
(Credit: MIT)

MIT researchers have shown how solar panels can be printed on paper and other cheap materials, opening a range of possibilities including homes with solar-panel window shades or wallpaper.

Last year, CNET’s Martin LaMonica reported on how MIT had developed the world’s first solar panel printed on paper. A recent MIT study in the journal Advanced Materials by Karen Gleason and colleagues details the innovation.

The paper photovoltaic arrays are created through an oxidative chemical vapor deposition process at temperatures less than 120 degrees Celsius.

Ordinary uncoated paper, cloth, or plastic can be used. The researchers printed solar cells on a layer of PET plastic, folded it 1,000 times, and found it would still work.

Multiple layers and a paper mask are used to print the cells in a vacuum chamber. MIT says the procedure is nearly as cheap and easy as inkjet printing.

When paper is printed with cells, it can produce less than 50 V, enough to power small devices in ambient indoor lighting. The solar panel still works even if text is printed upon it, as seen in this demo.

In the video below, the voltage on a meter changes as the solar-panel paper is repeatedly folded. The paper could be used indoors or, if laminated against the elements, outdoors.

“We have demonstrated quite thoroughly the robustness of this technology,” MIT quoted engineering professor Vladimir Bulovic as saying. “We think we can fabricate scalable solar cells that can reach record-high watts-per-kilogram performance. For solar cells with such properties, a number of technological applications open up.”

The technology is years away from commercialization and efficiency is only about 1 percent. But the researchers hope to increase that dramatically by experimenting with different materials.

The team has demonstrated the printing technique with regular printer paper, tissue, tracing paper, and even newsprint that had already been printed.

I doubt newspapers will still be around by the time this technology becomes common, but if they are you might just be able to recycle yesterday’s news into a source of renewable energy.

Read more: http://news.cnet.com/8301-17938_105-20078431-1/mit-demos-flexible-solar-panels-printed-on-paper/#ixzz1RsJ0p1BC


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