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SUMMARY:Resonant energy transfer of triplet excitons from organic to inorg
 anic semiconductors - Maxim Tabachnyk
DTSTART:20140519T150000Z
DTEND:20140519T160000Z
UID:TALK51240@talks.cam.ac.uk
CONTACT:Nalin Patel
DESCRIPTION:Winton Scholar Maxim Tabachnyk will host this informal discuss
 ion related to his PhD research.\n\nAbstract\nThe efficient transfer of en
 ergy between organic and inorganic semiconductors is a widely sought after
  property for applications in photovoltaics\, LEDs and sensors\, but has t
 o date been limited to the transfer of spin singlet excitons. In our journ
 al club\, I will report efficient resonant-energy transfer of molecular sp
 in triplet excitons from organic to inorganic semiconductors. Compared to 
 singlet excitons\, triplet excitons have the advantage of longer lifetimes
  and\, for some systems\, longer diffusion lengths. We use ultrafast optic
 al absorption spectroscopy to track the dynamics of triplets\, generated i
 n pentacene via singlet exciton fission\, at the interface with inorganic 
 nanocrystals. Following triplet transfer\, the excitation can undergo eith
 er charge separation\, allowing photovoltaic operation\, or radiative reco
 mbination in the nanocrystal\, enabling luminescent harvesting of triplet 
 exciton energy in light emitting structures. 
LOCATION:TCM Seminar room\, 530 Mott
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