Navigation Links
A molecular map to renewable energy?

Researchers hoping to make the next breakthrough in renewable energy now have plenty of new avenues to explore Harvard researchers today released a massive database of more than 2 million molecules that might be useful in the construction of solar cells that rely on organic compounds that might be useful in the construction of organic solar cells for the production of renewable energy.

Developed as part of the Materials Genome Initiative launched by the White House's Office of Science and Technology Policy (OSTP) the goal of the database is to provide researchers with a starting point for research aimed at increasing the efficiency of this cheap, easy-to-produce solar energy technology.

"One of the problems with organic solar cells is, right now, there are only a handful of molecules that are in the same league with silicon in terms of efficiency," Harvard Professor of Chemistry and Chemical Biology Aln Aspuru-Guzik said. "This is really a guide for experimentalists. What we're doing is democratizing access to this type of data in the same way that the biologists did with the Human Genome Project."

"In many ways, biology is far ahead of chemistry in these efforts," he added. "You can find the genome of a frog online, or the genome of a worm, but you cannot do that for the quantum properties of molecular materials. This database will provide access to the 'secret sauce' of these materials, so people can explore innovative new ideas."

The data was generated by the Harvard Clean Energy Project in partnership with the IBM and the group of Prof. Zhenan Bao at Stanford University. It uses supercomputing power provided by a network of thousands of volunteer donors around the world.

The importance of the project, he said, was clear: Unlike their silicon-based cousins, organic solar cells are far cheaper and easier to produce some can even be printed in a process similar to that used by inkjet printers. The flexible, lightweight cells can also be molded into virtually any shape, and can be rolled up and easily transported.

Those characteristics, Aspuru-Guzik said, point toward one of the major possible applications for the cells as a cheap power source for the more than 2 billion people world-wide without access to electricity.

"If you want to install solar cells on a building, you need them to last 20 or 30 years," he said. "But the real market for this technology is someone in the third world to have a cheap and portable source of energy that you can connect to a battery that's a big deal."

To create the database, researchers at Harvard first worked with scientists at Stanford to define a new class of molecules based on 26 basic fragments which could be combined in more than 3 million possible arrangements, explained Johannes Hachmann, a Research Associate in Harvard's Department of Chemistry and Chemical Biology.

To begin the work of characterizing each possibility, they then turned to the World Community Grid, a project founded by IBM, which uses distributed volunteer computing spare computer time donated by thousands of participants around the world to perform this vast number of calculations.

"Of the 3.1 million candidates, we have now characterized about 2.3 million, meaning we have electronic structure data for them," Hachmann said. "We can plug that data into models which predict how well each molecule would work for solar cell applications. Based on those results we rank the potential of each molecule those rankings are part of what we released."

"One has to take our ranking of materials as one would take that of candidate compounds for pharmaceutical applications," Aspuru-Guzik said. "The ranking is not foolproof but rather a guide to interesting families of molecular patters to explore. We look at it in a statistical sense and point out enriched and depleted fragments that are interesting targets for experimentalists to try."

In addition to identifying individual molecules with promise in solar applications, the database will allow scientists to understand whether the most promising molecules share chemical or structural similarities that allow them to act as better semiconductors.

Going forward, Aspuru-Guzik said, he plans to expand the Web site released today to act as a clearing-house for data from his and other groups that might be used to develop novel materials for other applications, including flow batteries for large-scale grid-energy storage and organic transistors.

"For all practical intents, there are an infinite number of molecules that chemists can make," Hachmann said. "By comparison, the number that we have characterized is fairly tiny. In materials science, it takes a graduate student roughly one year to come up with a new molecule and synthesize it. As a result, people typically try to improve things they're familiar with, or tweak things that already work reasonably well. As a consequence, the development is very incremental.

"The idea of this big data approach is that we can very quickly screen new compounds on the computer, and hopefully find new chemical domains or structural motifs which are successful for particular applications," he continued. "I like to use the example of nanotubes they were discovered by accident, but they have revolutionized how we think about materials science. That's one of our goals with this project to point to new class of molecules or compounds which are going to be successful."


Contact: Peter Reuell
Harvard University

Related biology news :

1. Researchers uncover molecular pathway through which common yeast becomes fungal pathogen
2. Beyond the microscope: Identifying specific cancers using molecular analysis
3. 2012 Forecast for US Molecular Diagnostics Market Now Available From Global Information Inc.
4. 5th Annual Advances in Biomolecular Engineering Symposium
5. PNAS: Precise molecular surgery in the plant genome
6. Molecular spectroscopy tracks living mammalian cells in real time as they differentiate
7. Hitting snooze on the molecular clock: Rabies evolves slower in hibernating bats
8. The activity of a bacterial effector protein seen in molecular detail
9. How bacteria change movement direction in response to oxygen: Molecular interactions unravelled
10. MARC travel award announced for the 2012 GSA Yeast Genetics and Molecular Biology Meeting
11. Highlighting molecular clues to the link between childhood maltreatment and later suicide
Post Your Comments:
(Date:11/2/2015)... Calif. , Nov. 2, 2015  SRI International ... million to provide preclinical development services to the National ... contract, SRI will provide scientific expertise, modern testing and ... variety of preclinical pharmacology and toxicology studies to evaluate ... --> The PREVENT Cancer Drug Development Program ...
(Date:10/29/2015)... Oct. 29, 2015  The J. Craig Venter Institute ... "DNA Synthesis and Biosecurity: Lessons Learned and Options for ... Health and Human Services guidance for synthetic biology providers ... --> --> Synthetic ... the potential to pose unique biosecurity threats. It now ...
(Date:10/29/2015)... ARBOR, Mich. , Oct. 29, 2015 /PRNewswire/ ... Eurofins Genomics for U.S. distribution of its DNA ... DNA-seq kit and Rubicon,s new ThruPLEX Plasma-seq kit. ... to enable the preparation of NGS libraries for ... plasma for diagnostic and prognostic applications in cancer ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... IN (PRWEB) , ... November 24, 2015 , ... The ... newest Special Interest Group (SIG), MultiGP, also known as Multirotor Grand Prix, to represent ... the last few years. Many AMA members have embraced this type of racing and ...
(Date:11/24/2015)... 24, 2015 --> ... report released by Transparency Market Research, the global non-invasive ... CAGR of 17.5% during the period between 2014 and ... Global Industry Analysis, Size, Volume, Share, Growth, Trends and ... testing market to reach a valuation of US$2.38 bn ...
(Date:11/24/2015)... 24, 2015 /PRNewswire/ - Aeterna Zentaris Inc. (NASDAQ: ... the remaining 11,000 post-share consolidation (or 1,100,000 pre-share ... "Series B Warrants") subject to the previously disclosed ... 23, 2015, which will result in the issuance ... to the issuance of such shares, there will ...
(Date:11/24/2015)... ... November 24, 2015 , ... In harsh industrial processes, ... for in-line sensors can represent a weak spot where leaking process media is ... retractable sensor housings , which are designed to tolerate extreme process conditions. They ...
Breaking Biology Technology: