Ultra-thin high-efficiency organic solar cells from Princeton

Fresh out of a first round of experiments at Princeton’s NanoStructure Laboratory, Dr. Steven Chou and Dr. Wei Ding released this report on the progress of their “plasmonic cavity with subwavelength hole-array” solar cell (PlaCSH). Using 30 nanometer-thick gold mesh instead of the indium-tin-oxide (ITO) layer that photovoltaic solar cells usually make use of, the Princeton team has managed to make PlaCSH solar cells 175% more efficient than traditional PV technology.

The gold nano-mesh is more efficient in several ways, thinking about the life cycle of solar cells. Indeed, gold is a rare metal (one that’s ever-increasing in value) but actually ends up being more cost effective than continuing to use the indium-tin-oxide compound we’ve been using thus far. Gold itself may not be cheap, but we’re talking about nano scale technology here — a nanometer, measuring in at one billionth of a meter, is usually used to scale dimensions at the atomic level. We use micrometers (a mere millionth of a meter) to measure human hair, just to give you an idea of how thin these gold nano-mesh layers are — the gold nano-mesh just doesn’t require that much material, especially considering the efficiency of Dr. Chou’s invented nanofabrication method. Price is a real measure of real resources, so getting the cost of manufacturing these solar cells down makes sense from an environmental sustainability perspective too, not just economic practicality.

Most importantly, however, the PlaCSH solar cells lose far less energy to reflection than traditional PV cells. Once light energy passes through the nano-mesh, it’s incredibly difficult for it to escape. The points in the nano-mesh through which light would usually be reflected back out are actually smaller than the photons themselves, so these otherwise rogue photons stick around to lend us their energy after all. The PlaCSH cells are significantly more efficient under cloud-cover, too, for those concerned with intermittency.

This innovative technology has the potential to revolutionize the solar energy industry and loosen the grip of fossil fuel dependency. Once the upfront costs of solar cells become competitive with the overall costs of fossil fuel production, it will make more economic sense to invest in solar technology over natural gas, e.g., because the pay-back period will be much shorter. The solar energy route offers reasonable (and decreasing) upfront costs and little to no maintenance costs — and, most obviously, we have more solar energy than we know what to do with. We may have to mine the gold to produce the nano-mesh, so it’s not totally benign, but it’s far less invasive than, say, Mountaintop Removal Mining.

Here to another step toward our sustainable energy future!



PS – This article by Grant Brunner of ExtremeTech has some nice diagrams depicting the way PlaCSH solar cells work in comparison to traditional ITO PV.

A prognosis of T. Boone Picken’s LNG vehicle future

I stumbled across this piece by Alan Krupnick this morning while browsing Real Clear Energy (one of my stops along my daily morning news adventure). Essentially, he offers us an evaluation of the state of play for T. Boone Picken’s vision of a LNG vehicle future. The prognosis, by Krupnick’s account, is still to uncertain to call, but I think we can make something of it.

Liquid Natural Gas is cheaper than gasoline or diesel because of its newly accessible abundance via hydraulic fracturing and horizontal drilling, but it also has drawbacks. The vehicles themselves are more expensive than gasoline or hybrid alternatives (e.g. – Honda’s new LNG Civic as compared to its gasoline and hybrid counterparts) so the payback point takes longer to reach through savings on fuel costs alone. Of course there are subsidy programs that could bring down the cost, but they expired in 2010, and the prospect of getting Congress to agree on much of anything is, well…bleak, let’s say.

LNG vehicles also have significantly shorter range than gasoline or hybrid alternatives — and that’s before mentioning that LNG fuel tanks can take up to 50% more space than gasoline tanks or hybrid batteries, and even with severely reduced cargo or passenger space they still have shorter ranges (LNG: 218 miles per tank v. Gas: 383 mpt v. Hybrid: 504 mpt [looking again at different models of the Civic]). So, given the space issue, it may make more sense to focus on using LNG in large trucks, vans, and buses. But forecasts of the costs of maintenance are unclear, so fleets of LNG vehicles will have to struggle with uncertainty on that front for some time.

Finally, there is the question of infrastructure for LNG vehicles, which Krupnick frames as a ‘chicken or the egg’ conundrum. Infrastructure developers want there to be plenty of LNG vehicles on the road before taking on big projects, but consumers want infrastructure to be in place before they’ll be willing to take the risk of buying a non-gasoline or non-hybrid vehicle. Perhaps this gap can be bridged through commercial cooperation, where prospective LNG truck fleet purchasers coordinate with infrastructure developers to start building refueling stations in strategic locations along pre-established routes. Maybe if LNG starts showing up at Love’s or Buc-ee’s it’ll start making more sense for people to make the change (the same applies for electric vehicle plug-in stations, or even hydrogen powered vehicles), but until that happens most will probably see it as too risky, especially considering the reduced range of LNG vehicles.

Of course, there are still plenty of concerns worth raising about how we get our natural gas these days (fracking), the actual economic ripples of the industry, and the climate change/air pollution impacts of carbon dioxide and methane emissions associated with natural gas production. But T. Boone Pickens is convinced that LNG should be the future of transportation and Krupnick nods toward optimism, despite citing “uncertainties” about the environmental dimensions of such a transition.

So ask yourself — what is the real issue at hand? Cheap energy? Energy security? Environmental stewardship? Climate change mitigation? Energy independence? Economic growth?

At its core this represents one of the latest technological stabs at perpetuating our energy intensive standard of living while attempting to accommodate other competing values — but for all that it’s worth, we’re still talking about a short-term fix. And it’s one with many uncertainties surrounding it. Switching from oil to natural gas, at best, is like a first stitch in mending a deep wound. It may stop the bleeding a little, but we’re still lost in the woods if sustainable energy is our goal. Natural gas is, in many ways, desireable, questionable, risky, and perhaps inevitable (though not in some cases re: Longmont, Boulder, Yellow Springs, Broadview Heights, Meyers Lake, Cincinnati & the State of Ohio), so if we are going to use it, we ought to use it as best we can to pave the way for or to buy us time until sustainable, renewable energy technologies become competitive. In the meantime, I would still recommend going the Hybrid route or carpooling if you must drive — and even further, consider alternatives to personal automobiles like walking, biking, or public transit. Of course this isn’t always feasible, practical, or compatible with our established ways of life (especially living in places like North Central Texas) but small steps eventually traverse the world. We must, in this case and many others, take Ghandi’s advice and be the change we wish to see.


JM Kincaid

To Frack or Not to Frack

The survey component of To Frack or Not to Frack is now closed–many thanks to all who participated. Results will be publicly available here and through Bard CEP. Stay tuned…

To Frack or Not to Frack

A survey of beliefs about hydraulic fracturing for natural gas

Dear energy consumers,

Hydraulic fracturing, or “fracking,” for natural gas plays an important role in the debate about our energy future. As an energy consumer, you may have beliefs about, or beliefs that relate to, the use of hydraulic fracturing technology. Given the prominence of natural gas in today’s energy discourse, I am using my Master’s thesis at the Bard Center for Environmental Policy to study the political and ideological dimensions of hydraulic fracturing. My goal is to develop a more thorough understanding of the relationships between socioeconomics, political alignments, philosophical beliefs, and support or lack thereof for the use of hydraulic fracturing technology – but my research depends on your participation. Here and below you will find a link that directs you to a survey with questions related to the current debate about hydraulic fracturing and natural gas:

To Frack or Not to Frack

To help me with my research, I ask that you complete the survey and then share this message and link with your friends, family, colleagues, coworkers, and other contacts so that they might do the same. If you have any questions please email them to jmk.frackingideals@gmail.com and I will answer you promptly. Thank you for your participation.


Jordan M. Kincaid

Tidal power makes waves in Maine

Admittedly, the Sun is my usual celestial body of interest, but today I feel compelled to mention the Moon. Or rather, the tides that the Moon’s gravity creates here on Earth. Tidal power is an almost entirely untapped source of renewable energy in the United States. Almost. For the first time in history, tidal energy is contributing to the US power grid. On Thursday, Sept. 13, 2012, Ocean Renewable Power Company’s Maine Tidal Energy Project, using underwater turbines off the coast of Maine, delivered electricity to ~27 homes. Incremental developments in technology and our use of renewable energy like this are, I think, certainly cause for optimism re our evolution beyond fossil fuels. After all, small steps make for giant leaps. And we need a giant leap.

Here is a link to the ORPC project website, and here is the Huff Po article that first reported the project’s coming online.


Third year of triple-digit growth in US solar PV market

In the second quarter of 2012 the US installed 742 Megawatts of utility-scale solar PV, reports GTM Research. This growth is largely attributable to the new Agua Caliente, Mesquite, and Silver State solar plants, all of which were backed by federal loan guarantees. I would like to think this means we can put the Solyndra issue to rest. Loan guarantee programs help free up capital for important projects to which private investors suffering from Keynesian mass psychosis are reluctant to commit. Sure, they can be risky at times, like all investments, but developing renewable energy technology stands as perhaps the most salient hurdle to perpetuating our high standard of living, making our energy intensive lifestyles sustainable, and maintaining a healthy environment for our contemporaries, future generations, and non-humans. For we who champion progress as sustainable improvements in science, technology, and social organization, this is surely welcome news.

JM Kincaid

Solar in the southwest

The US Department of Energy and the Department of the Interior’s Bureau of Land Management have released the “Final Programmatic Environmental Impact Statement” (FPEIS) for utility-scale solar energy operations on public lands in Arizona, California, Colorado, Nevada, Utah, and New Mexico. This “solar roadmap” estimates we will be able to harness 23,700 megawatts from 285,000 acres of developed lands, enough to power 7 million US homes with renewable energy.

285,000 acres might sound substantial, but everything we do involves trade offs. Deciding to pursue one opportunity inherently means not pursuing another, hence the name opportunity cost. But 285,000 acres only make up one ten-thousandth of the United States’ total acreage, meaning that from one hundredth of one percent of our land we could supply power to 2.3% of our country’s population. Seems like a good trade off to me. To the sun god!

JM Kincaid