News / Science & Technology

Volunteers Help Scientists in Search for Cheap Solar Cells

Volunteers Help Scientists in Search for Cheap Solar Cellsi
X
July 15, 2013 6:40 PM
Solar cells remain a relatively expensive investment for ordinary consumers of electric power. But a group of scientists at Harvard University is looking for cheaper, organic solar cells, which could be painted on rooftops and building facades. In their research, they are employing the help of thousands of volunteers around the world. VOA's George Putic has more.
George Putic
Solar cells remain a relatively expensive investment for ordinary consumers of electric power. But a group of scientists at Harvard University is looking for cheaper, organic solar cells, which could be painted on rooftops and building facades. In their research, they are employing the help of thousands of volunteers around the world.

Most of today's solar cells are silicon-based and their manufacture requires sophisticated machinery and expertise. An average home in the United States uses between 20 and 24 kilowatt hours of electricity every day. And it may cost up to $20,000 to buy and install solar panels that can produce that much energy. While economical in the long run, it is an expense many cannot afford.

But a group of researchers in the Harvard Clean Energy Project is looking for cheaper, carbon-based compounds that could substantially lower that price. Project head Alan Aspuru said that a carbon-based solar cell would have to be about 10 percent efficient to make an impact.  

"This basically means that 10 percent of the sunlight that hits the device is converted into energy. There's about three, or four, or maybe five - a handful of molecules that we know about, that already have this efficiency. And this has been discovered in the last year or a couple of years," said Aspuru.

Aspuru says today's most commonly used silicon-based solar cells also do not have a very high efficiency, just about 15 percent. More-efficient solar cells do exist, but they are used mainly on satellites, due to their high cost. But cheap carbon-based solar cells could cover large surfaces - compensating for their low efficiency.

Researchers already have identified 2.3 million carbon-based compounds, out of which 35,000 potentially could have efficiency above 10 percent.

"That does not necessarily mean that those 35,000 molecules, all of them would be above 10 percent efficient. For a solar cell that basically means they could potentially be, and more research has to be done on them," he said.

Aspuru said further analysis of those compounds requires large computing power, which his group is getting from volunteers around the world who donate their computers' time to a "virtual supercomputer" project.

"In my case, in partnership with [the] IBM project for the World Community Grid, hundreds of thousands of people that are registered in the database of IBM are on and off computing for many projects, including ours," he said.

Researchers are hopeful their findings will spur innovation, and that based on this research, experimental laboratories around the world will be able to come up with new materials.  

Results so far are encouraging. The Clean Energy Project already has discovered a powerful organic semiconductor named DA2T. It's the second best semiconductor reported in scientific literature.

You May Like

Photogallery Kyiv: Russian Forces Tightening Grip on East

And new United Nations report documents human rights abuses committed by both sides in conflict More

Locust Swarms Fill Antananarivo Skies

FAO-led control efforts halted plague More

South Africa’s Plan to Move Rhinos May Not Stop Poaching

Experts say international coordination needed to follow the money trail and bring down rhino horn kingpins More

This forum has been closed.
Comment Sorting
Comments
     
by: Shane Bird from: Temecula CA
July 18, 2013 1:16 PM
I was interested in the claim made about DA2T but I found that the claim reported here is somewhat misleading, it is actually the second best organic semiconductor.

In Response

by: boyce from: solarpanelcellonline.com/
July 31, 2013 11:40 PM
The Clean Energy Project already has discovered a powerful organic semiconductor named DA2T. It's the second best semiconductor reported in scientific literature.


by: Yoshi from: Sapporo
July 17, 2013 3:26 AM
Yes, I agree solar panel is too expensive to apply the roof of my house at present. Its life expectancy is about ten to twenty years so that we have to replace it with new one before installing cost is payed.

New solar cells using carbon or bio-based compounds sound promising for popular use. It makes sense that selecting some compounds efficient above 10 percent from 35,000 candidates needs so many calculations. I hope crowd computers offered by numerous volunteers world wide would work well.

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Ebola Vaccine Trials To Begin Next Weeki
X
August 29, 2014 2:18 AM
The National Institutes of Health says it is launching early stage trials of a vaccine to prevent the Ebola virus, which has infected or killed thousands of people across West Africa. The World Health Organization says Ebola could infect more than 20,000 people across the region by the time the outbreak is over. The epidemic has health experts and governments scrambling to prevent more people from becoming infected. Zlatica Hoke has more.
Video

Video Ebola Vaccine Trials To Begin Next Week

The National Institutes of Health says it is launching early stage trials of a vaccine to prevent the Ebola virus, which has infected or killed thousands of people across West Africa. The World Health Organization says Ebola could infect more than 20,000 people across the region by the time the outbreak is over. The epidemic has health experts and governments scrambling to prevent more people from becoming infected. Zlatica Hoke has more.
Video

Video Asian Bacteria Threatens Florida Orange Trees

Florida's citrus fruit industry is facing a serious threat from a bacteria carried by the Asian insect called psyllid. The widespread infestation again highlights the danger of transferring non-native species to American soil. VOA’s George Putic reports.
Video

Video Aging Will Reduce Economic Growth Worldwide in Coming Decades

The world is getting older, fast. And as more people retire each year, fewer working-age people will be there to replace them. Bond rating agency Moody’s says that will lead to a decline in household savings; reducing global investments - which in turn, will lead to slower economic growth around the world. But experts say it’s not too late to mitigate the economic impact of the world’s aging populations. Mil Arcega has more.
Video

Video Is West Doing Enough to Tackle Islamic State?

U.S. President Barack Obama has ruled out sending ground troops to Iraq to fight militants of the so-called Islamic State, or ISIS, despite officials in Washington describing the extremist group as the biggest threat the United States has faced in years. Henry Ridgwell reports from London on the growing uncertainty over whether the West’s response to ISIS will be enough to defeat the terrorist threat.
Video

Video Pachyderms Play Polo to Raise Money for Elephants

Polo, the ancient team competition typically played on horseback, is known as the “sport of kings.” However, the royal version for one annual event in Thailand swaps the horse for the kingdom’s national symbol - the elephant. VOA Correspondent Steve Herman in Samut Prakan reports that the King’s Cup Elephant Polo tournament is all for a good cause.
Video

Video Coalition to Fight Islamic State Could Reward Assad

The United States along with European and Mideast allies are considering a broader assault against Islamic State fighters who have spread from Syria into Iraq and risk further destabilizing an already troubled region. But as VOA State Department Correspondent Scott Stearns reports, confronting those militants could end up helping the embattled Syrian President Bashar al-Assad.
Video

Video Made in America Socks Get Toehold in Online Fashion Market

Three young entrepreneurs are hoping to revolutionize the high-end sock industry by introducing all-American creations of their own. And they’re doing most of it the old-fashioned way. VOA’s Julie Taboh recently caught up with them to learn what goes into making their one-of-a-kind socks.
Video

Video Americans, Ex-Pats Send Relief Supplies to West Africa

Health organizations from around the world are sending supplies and specialists to the West African countries that are dealing with the worst Ebola outbreak in history. On a smaller scale, ordinary Americans and African expatriates living in the United States are doing the same. VOA's Carol Pearson reports.
Video

Video America's Most Popular Artworks Displayed in Public Places

Public places in cities across America were turned into open-air art galleries in August. Pictures of the nation’s most popular artworks were displayed on billboards, bus shelters, subway platforms and more. The idea behind “Art Everywhere,” a collaborative campaign by five major museums is to allow more people to enjoy art and learn about the country’s culture and history. Faiza Elmasry has more.
Video

Video Chinese Doctors Use 3-D Spinal Implant

A Chinese boy suffering from a debilitating bone disease has become the first patient with a part of his spine created in a three-dimensional printer. Doctors say he will soon regain normal mobility. VOA’s George Putic reports.
Video

Video India’s Leprosy Battle Stymied by Continuing Stigma

Medical advancements in the treatment of leprosy have greatly diminished its impact around the world, largely eliminating the disease from most countries. India made great strides in combating leprosy, but still accounts for a majority of the world’s new cases each year, and the number of newly infected Indians is rising - more than 130,000 recorded last year. Doctors there say the problem has more to do with society than science. Shaikh Azizur Rahman reports from Kolkata.
Video

Video Scientists Unlock Mystery of Bird Flocks

How can flocks of birds, schools of fish or herds of antelope suddenly change direction -- all the individuals adjusting their movement in concert, at seemingly the same time? British researchers now have some insights into this behavior, which has puzzled scientists for a long time. VOA's George Putic has more.

AppleAndroid