Probing a molecular interface in a functioning organic diode

Young Jong Lee, So Jung Park, Andre J. Gesquiere, Paul F. Barbara

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The effect of hole-polaron charging at a hole-injection/hole-transport interface within a functioning organic diode was investigated by single molecule spectroscopy and associated modeling. Efficient quenching of both singlet and triplet excitons by hole polarons is observed at high forward bias due to a buildup of interfacial polaron density. Additionally, for some diodes, an unexpected quenching process was observed at reverse bias, which is ascribed to hole charging of the interface due to the leakage current.

Original languageEnglish
Article number051906
JournalApplied Physics Letters
Issue number5
StatePublished - 2005

Bibliographical note

Funding Information:
This work was supported by the National Science Foundation, Welch Foundation, and Keck Foundation.


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