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Organic Double‐Heterostructure Photovoltaic Cells Employing Thick Tris(acetylacetonato)ruthenium( III ) Exciton‐Blocking Layers
Author(s) -
Rand B. P.,
Li J.,
Xue J.,
Holmes R. J.,
Thompson M. E.,
Forrest S. R.
Publication year - 2005
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200500816
Subject(s) - materials science , ruthenium , exciton , acceptor , heterojunction , organic solar cell , cathode , tris , photovoltaic system , photochemistry , optoelectronics , chemistry , polymer , organic chemistry , condensed matter physics , composite material , catalysis , ecology , biochemistry , physics , biology
Bathocuproine (BCP) or tris(acetylacetonato)ruthenium( III ) (Ru(acac) 3 ) is used as the exciton‐blocking layer (EBL) in photovoltaic cells. The difference in thickness‐dependent efficiency characteristics between the blockers (see Figure) is that the Ru(acac) 3 energy‐level alignment allows for the transport of holes from the cathode to the C 60 acceptor level, whereas BCP relies on metal‐deposition‐induced damage for charge transport.