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Quantification of Nano‐ and Mesoscale Phase Separation and Relation to Donor and Acceptor Quantum Efficiency, J sc , and FF in Polymer:Fullerene Solar Cells
Author(s) -
Ma Wei,
Tumbleston John R.,
Ye Long,
Wang Cheng,
Hou Jianhui,
Ade Harald
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.201400216
Subject(s) - materials science , fullerene , nanoscopic scale , polymer , nano , chemical physics , organic solar cell , acceptor , scattering , phase (matter) , ideal (ethics) , quantum , mesoscale meteorology , chemical engineering , nanotechnology , optics , composite material , condensed matter physics , meteorology , physics , engineering , philosophy , epistemology , quantum mechanics
Two characteristic length scales are revealed and quantified in a complex hierarchical polymer–fullerene blend by combining different X‐ray scattering techniques. Anti‐correlated composition variations between meso‐ and nanoscale separation are observed and impacted by the solvent mixture. Due to competition between the impact of the two length scales, the relation to device performance is complex and an ideal morphology is yet to be delineated.