Electronic structure and dynamics at organic donor/acceptor interfaces

Xiaoyang Zhu, Antoine Kahn

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

We present our understanding of the electronic energy landscape and dynamics of charge separation at organic donor/acceptor interfaces. The organic/organic interface serves as a valuable point of reference and plays an important role in emerging electronic and optoelectronic applications, particularly organic photovoltaics (OPVs). The key issue on electronic structure at organic donor/acceptor interfaces is the difference in the lowest unoccupied molecular orbitais or that in the highest occupied molecular orbitais. This difference represents an energy gain needed to overcome the exciten binding energy in a charge-separation process in OPV. A sufficiently large energy gain favors the formation of charge transfer (CT) states that are energetically close to the charge-separation state. At an organic donor/acceptor interface in an OPV device, these high-energy CT states, also called hot CT excitons, are necessary intermediates in a successful charge-separation process.

Original languageEnglish (US)
Pages (from-to)443-448
Number of pages6
JournalMRS Bulletin
Volume35
Issue number6
DOIs
StatePublished - Jan 1 2010

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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