Singlet exciton transfer and fullerene triplet formation in polymer-fullerene blend films

Steffan Cook, Hideo Ohkita, James R. Durrant, Youngkyoo Kim, Jessica J. Benson-Smith, Jenny Nelson, Donal D.C. Bradley

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

Photoluminescence and transient absorption measurements of poly(9,9-dioctylfluorene-altbenzothiadiazole) (F8BT) and 1-(3-methoxycarbonyl) propyl-1-phenyl-(6,6)C61 (PCBM) blend films reveal that optical excitation of F8BT results in formation of the singlet and triplet excited states of PCBM. These observations are assigned to rapid (>1011 s-1) singlet energy transfer from F8BT to PCBM, followed by intersystem crossing to the PCBM triplet state. © 2005 American Institute of Physics.
Original languageEnglish (US)
JournalApplied Physics Letters
Volume89
Issue number10
DOIs
StatePublished - Sep 15 2006
Externally publishedYes

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