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Singlet Fission

Event Details

Event Dates: 

Friday, March 16, 2012 - 10:00am

Speaker Name(s): 

Josef Michl

Speaker Affiliation(s): 

University of Colorado, Boulder
Seminar Type/Subject

Event Details & Abstract: 

Singlet fission is a process in which an excited singlet molecule shares some of its energy with a nearby ground state singlet molecule and both end up in their respective triplet excited states. By splitting one excitation into two, it has the potential for producing two electron-hole pairs from a single absorbed photon. A detailed analysis showed that this would enhance the limiting theoretical efficiency of a solar cell from the Shockley-Queisser limit of about 1/3 to almost 1/2.Only very few compounds have been shown to perform singlet fission efficiently. My research group collaborates with Nozik's group at NREL and Ratner's group at Northwestern in an effort to use first principles to devise design rules for additional chromophores that perform singlet fission efficiently.

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