This and that

Kid is growing, lack of sleep makes euphoric, but less time is less time;-)

The 2010 impact factors were just released by Thomson Reuters, Sunset at Ammerseeas most of you will know due to the mails sent by almost all publishers to tell about recent boosts of impact for their journals. A sober post was written by Jörg Heber, editor of Nature materials. A brief quote

So what use is the impact factor number? Well, being cynical one could say it is a quick measure for those that don’t read the journals but still want to know how good they are on average. The danger is of course that this is then used as a kind of metric to assess the quality of research or to decide on the career of researchers.

Continue reading “This and that”

Blue suits him better than pink

Children change the life, how very true. Not that I am less interested in Science in general, kleine HändeI do enjoy it! Nevertheless, somehow work seems less important these days – which maybe I should not admit openly ;-)

I received this statement,

Blue suits the lecturer better than pink

as one of the results of the lecture evaluation (Atom Physics for “Teachers to be”). Yes, I also received some other comments, most positive, some negative, all useful (including that one?;-)

Just to say that I am still amongst the living, here some bits and pieces I found during the last weeks, when time allowed. Continue reading “Blue suits him better than pink”


Comments? I just changed the comment settings: up to now, a WordPress account was needed in order to be able to comment on my posts. Believe me or not, I did not even know about this setting till today. Now, you only have to give your (or some;-) name and an email address (yours? I do not know). Maybe this lowers the barrier for some of you to ask questions or provide further insights and critical views.

Tomorrow is abstract deadline for the SPIE Optics and Photonics 2011, including the session Organic Photovoltaics XII. See you there:-)

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RelaxEU proposal submitted today, acceptance rate last year was 7%… so something for relaxing is required;-) As everybody relaxes differently, you have the choice of looking at the photograph or watching the video Bad project (disclaimer: a parody – thanks to Thiemo for the link).

For unrelated reading, but following up some other notes on publishing and peer review (see overview of posts here), an insightful post by Cameron Neylon: What is it with researchers and peer review? or; Why misquoting Churchill does not an argument make. If you are researcher, peer review is (and will remain) important. Therefore, staying up to date is not only interesting (e.g., you get to see the real Churchill quote;) but also useful to see its pros and cons more clearly. Interesting may be this Nature Materials editorial on Transparency in peer review (free with registration). Out of curiosity I just checked: I reviewed 21 papers in 2010, so a couple more than I (or a coauthor) actually submitted, but a lot less than I was asked to review…

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A happy and successful new year to you! It is almost three years since I started this blog, this being the 69th post. A lot happened in this time, also for me: both personally (as some of the long term readers now;-) and professionally (despite still being in Würzburg;-). Golden Pavilion (Kinkaku-ji) So, let me thank you, valued reader – and comments contributor, an active participation which I highly appreciate!

Many things I want to write about I have not had time to handle in the recent months. For now, let me start with just briefly revisiting what I have written. Hints of what I will add in the coming weeks and months are to come soon (soon meaning: worst case mid February, as one proposal is submitted by then, lecture is finished and project meeting / seminar talk marathon “finished”;-).

Find the overview below. Continue reading “2011”

Two notes

A few weeks ago, Heliatek managed to take the lead for organic solar cell efficiencies, achieving 8.3% confirmed power conversion efficiency on 1.1cm2 active area with vacuum deposited small molecules. Madeira Rainbow in AutumnThe device was a tandem. Thomas Körner, VP of Sales, marketing and Business Development at Heliatek, added

The first products should be coming onto the market at the start of 2012.


Second, you may remember my post on photocurrent in organic solar cells back in July. It was inspired by a comment I wrote on a paper by Street et al, who proposed monomolecular recombination to dominate the loss of free charges in organic bulk heterojunction solar cells. My comment and Bob Street’s reply to it are now online at Phys Rev B. I’ll not comment this interesting exchange any further (unless requested by you;-), so read and think for yourself!

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Publish like a pro

Today, I saw the article Publish like a pro by Kendall Powell in Nature. Some tips on how to write:

  • You are only as good as your last paper – previous success does not guarantee future acceptance.Walking to Schloss Burg
  • You’ve got to hook the editor with the abstract.
  • Don’t delete those files. Keep every version. You never know what aspect you can use for some other piece of writing.
  • Writing is an amazingly long learning curve. many authors say that they’re still getting better as a writer after several decades.
  • The most significant work is improved by subtraction. Keeping the clutter away allows a central message to be communicated with a broader impact.
  • Write every day if possible.
  • once you’ve written what you wanted to convey, end it there.

These go hand in hand with this earlier post, although Kendall’s article does not stop there. Therefore, read it!

Personally, what I need for writing is a quiet, non-distracting environment with the internet switched off.

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“Notable Quotables”

Via Scott Berkun, a nice 2007 article by Louis Menand in the New Yorker:

Sherlock Holmes never said “Elementary, my dear Watson.” Sea LionNeither Ingrid Bergman nor anyone else in “Casablanca” says “Play it again, Sam”; Leo Durocher did not say “Nice guys finish last”; Vince Lombardi did say “Winning isn’t everything, it’s the only thing” quite often, but he got the line from someone else. Patrick Henry almost certainly did not say “Give me liberty, or give me death!”; William Tecumseh Sherman never wrote the words “War is hell”; and there is no evidence that Horace Greeley said “Go west, young man.” Marie Antoinette did not say “Let them eat cake”; Hermann Göring did not say “When I hear the word ‘culture,’ I reach for my gun”; and Muhammad Ali did not say “No Vietcong ever called me nigger.”

In order to have one that was said – Daniel Patrick Moynihan:

Everyone is entitled to his own opinion, but not his own facts.

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Hot CT complexes and Geminate Recombination

Lately, the notion that geminate recombination in organic solar cells is a major loss mechanism is more and more under fire. Foothill MountainsStreet et al present an “experimental test” for geminate recombination [Street 2010a]. They investigate P3HT:PC60BM nor PCDTBT:PC70BM bulkheterojunction solar cells with a transient current technique at 200K and 300K between -1 and 1V external voltage bias. The authors conclude that neither exhibit significant geminate recombination, while pointing out that

Since the relative importance of geminate or nongeminate recombination depends on the specific materials comprising the cell and possibly on the method of preparation, other cells may or may not have a larger geminate recombination contribution.

Continue reading “Hot CT complexes and Geminate Recombination”