Related to this post on Konarka’s bankruptcy: According to a range of news sites, including pv-tech.org, the german company Belectric has acquired Konarka Technologies. Find the press release here (pdf).
The system integrator Belectric is situated in Lower Franconia, less than 50km from Würzburg and less than 10km from where I live. Let’s keep our fingers crossed!
Nongeminate recombination is the major loss mechanism for state-of-the-art organic solar cells. In an early blog post
, I showed how the Langevin recombination was derived.
Although there is more to nongeminate recombination than just this mechanism, it is still instructive and also relevant to trap-assisted recombination mechanisms, due to its mobility-containing prefactor.
[Nenashev 2010] pointed out that in the derivation of the Langevin recombination,
since the electric field scales as r−2 and the surface area of the sphere scales as 2, the value of r chosen is unimportant, leading to a simple solution with constant electron den- sity, thus justifying the neglect of diffusion.
Continue reading “Nongeminate Recombination: Langevin (again) and beyond (later;-)”
Via Juan Bisquert’s post: solar cell company Konarka filed for bankrupty yesterday according to Businessweek. It is always hard to be the first… Konarka received its first venture capital in mid 2001.
Howard Berke, CEO of Konarka:
This is a tragedy for Konarka’s shareholders and employees and for the development of alternative energy in the U.S.
Let’s hope that our friends from Konarka find other suitable positions, and that other companies such as Heliatek take up the lead!
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Although I hope I can post something more substantial next week, but do not want to promise what I may not be able to keep…
Organic solar cells:
Science Management and Marketing:
German physical society (DPG) spring meeting in Berlin is still ongoing, although I had to leave already. 6000 (mostly german) physicists on the TU Berlin Campus, nice place to be!
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Hi, a link list just to keep you occupied;-)
- From December 2011, but nevertheless interesting: critical comment by Joerg Heber, senior editor of Nature Materials, on Organic Solar Cells.
- Criticism of publisher Elsevier becomes louder again (some history of it in the previous link = Wikipedia entry): the mathematician Gowers speaks out in his blog post Elsevier — my part in its downfall (and a follow up post here), and PZ Myers rants Elsevier = Evil in his blog. There is even a website where you can sign upto protest against Elsevier’s practices of driving prices for their journals very high, thecostofknowledge.com. I have to admit I did not do it; just now a book was released by Academic Press (which is an Elsevier brand) with a chapter by me, and also I’d somehow feel strange to boycott one of the few journals (or even the only one?) on organic electronics by Elsevier, the one with just that name. Nevertheless, I agree that information should be made widely available, specifically if funded with public money. That is one of the reasons why I upload most of our articles to the arXiv.org e-print archive.
- Essay by Santiago Alvarez on the wide range of different arrows chemists use… Chemistry: A Panoply of Arrows.
- Adv Funct Mater editorial by Dave Flanagan: More Fundamental Understanding In Materials Science
- Nature News by Jim Giles, Going paperless: The digital lab on using Ipad as your notebook with commercial labbook software.
- Did I link to this nature education piece on English communication for scientists already? I particularly liked the comic on the first page;-)
- The voice of science: let’s agree to disagree by Daniel Sarewitz about the importance of disagreements.
Next week a round of referees will come to Würzburg to decide on another set of grant proposals, so I’ll go back to my preparations now…
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