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Organic solar cells with very high fill factor and voltage using tetrapropyl‐tetraphenyl‐diindenoperylene as green donor
Author(s) -
Meiss Jan,
Hummert Markus,
Ziehlke Hannah,
Leo Karl,
Riede Moritz
Publication year - 2010
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201004310
Subject(s) - block (permutation group theory) , open circuit voltage , voltage , acceptor , exciton , spectral line , chemistry , diffusion , physics , materials science , condensed matter physics , mathematics , combinatorics , astronomy , quantum mechanics
Abstract We present 2,3,10,11‐tetrapropyl‐1,4,9,12‐tetraphenyl‐diindeno[1,2,3‐cd:1′,2′,3′‐lm]perylene (P4‐Ph4‐DIP) as new green donor for small molecule organic solar cells (SMOSC). P4‐Ph4‐DIP absorbs in the green spectral range of 490–580 nm and thus is a decisive building block towards broad coverage of the sun spectrum. SMOSC with P4‐Ph4‐DIP as donor and C 60 as blue‐absorbing acceptor display very high fill factors FF > 76% and open circuit voltages of 0.99 V, reaching η = 1.92% for 12 nm P4‐Ph4‐DIP. Current voltage and external quantum efficiency spectra suggest that an exciton diffusion length E D < 20 nm is the main limiting factor. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)