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Nanostructured Singlet Fission Photovoltaics Subject to Triplet‐Charge Annihilation
Author(s) -
Thompson Nicholas J.,
Hontz Eric,
Congreve Daniel N.,
Bahlke Matthias E.,
Reineke Sebastian,
Van Voorhis Troy,
Baldo Marc A.
Publication year - 2014
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.201304588
Subject(s) - singlet fission , annihilation , photovoltaics , fission , singlet state , charge (physics) , exciton , process (computing) , materials science , computer science , optoelectronics , particle physics , physics , nuclear physics , photovoltaic system , electrical engineering , excited state , condensed matter physics , engineering , neutron , operating system
Singlet exciton fission is an efficient multiple‐exciton generation process that is vulnerable to a characteristic loss process: triplet‐charge annihilation. This loss process is characterized in singlet‐fission photovoltaics and losses as high as 40% are observed in poorly designed devices. Techniques are demonstrated to improve charge extraction and reduce triplet‐charge annihilation to negligible levels at short‐circuit conditions.