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Suppressing Recombination in Polymer Photovoltaic Devices via Energy‐Level Cascades
Author(s) -
Tan ZhiKuang,
Johnson Kerr,
Vaynzof Yana,
Bakulin Artem A.,
Chua LayLay,
Ho Peter K. H.,
Friend Richard H.
Publication year - 2013
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.201300243
Subject(s) - materials science , photovoltaic system , recombination , polymer , optoelectronics , open circuit voltage , electron , short circuit , voltage , electrical engineering , physics , biochemistry , chemistry , quantum mechanics , composite material , gene , engineering
An energy cascading structure is designed in a polymer photovoltaic device to suppress recombination and improve quantum yields. By the insertion of a thin polymer interlayer with intermediate energy levels, electrons and holes can effectively shuttle away from each other while being spatially separated from recombination. An increase in open‐circuit voltage and short‐circuit current are observed in modified devices.