18. March 2013
On 11th of February (my birthday, incidentally), our 2nd child was born: Nicolas Jacob. We are so happy, as is our 2 year old daughter Chiara.
Even with only one kid, it was already rather quiet on this blog in the last months (well, 2 years…). Still, I do have some hope to be able to dedicate one or the other quiet minute to write some urgently needed updates to previous posts. All the best, Carsten
23. October 2012
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!
16. October 2012
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.
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2. June 2012
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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28. March 2012
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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