Organic Double‐Heterostructure Photovoltaic Cells Employing Thick Tris(acetylacetonato)ruthenium(III) Exciton‐Blocking Layers

• DOI: 10.1002/adma.200500816
• Publication Date: 2005-09-29T16:47:31Z
• Authors: B. P. Rand; J. Li; J. Xue; R. J. Holmes; M. E. Thompson; S. R. Forrest
• Keywords: Acceptor

Bathocuproine (BCP) or tris(acetylacetonato)ruthenium(III) (Ru(acac)3) is used as the exciton-blocking layer (EBL) in photovoltaic cells. The difference thickness-dependent efficiency characteristics between blockers (see Figure) that Ru(acac)3 energy-level alignment allows for transport of holes from cathode to C60 acceptor level, whereas BCP relies on metal-deposition-induced damage charge transport.