Coherence and Uncertainty in Nanostructured Organic Photovoltaics

TitleCoherence and Uncertainty in Nanostructured Organic Photovoltaics
Publication TypeJournal Article
Year of Publication2013
AuthorsKaake LG, Moses D, Heeger AJ
JournalJOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume4
Pagination2264-2268
Date Published07/2013
Type of ArticleArticle
ISSN1948-7185
Abstract

The effects of fundamental uncertainty present a compelling rationale for a highly delocalized photoexcitation on ultrafast time scales. This delocalized photoexcitation enables an immediate probability of charge-transfer over distances compatible with the uncertainty principle. We perform transient absorption measurements on organic bulk heterojunction solar cells to investigate charge-transfer dynamics in a variety of materials. A startling generality emerges indicating that the majority of charge carriers are generated at times within the temporal resolution of our instrument (similar to 100 fs).

DOI10.1021/jz4010569