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Solvent Additive Effects on Small Molecule Crystallization in Bulk Heterojunction Solar Cells Probed During Spin Casting
Author(s) -
Perez Louis A.,
Chou Kang Wei,
Love John A.,
van der Poll Thomas S.,
Smilgies DetlefM.,
Nguyen ThucQuyen,
Kramer Edward J.,
Amassian Aram,
Bazan Guillermo C.
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.201302389
Subject(s) - materials science , crystallite , crystallization , solvent , casting , heterojunction , chemical engineering , molecule , energy conversion efficiency , polymer solar cell , scattering , optoelectronics , optics , organic chemistry , composite material , chemistry , physics , engineering , metallurgy
Solvent additive processing can lead to drastic improvements in the power conversion efficiency (PCE) in solution processable small molecule (SPSM) bulk heterojunction solar cells. In situ grazing incidence wide‐angle X‐ray scattering is used to investigate the kinetics of crystallite formation during and shortly after spin casting. The additive is shown to have a complex effect on structural evolution invoking polymorphism and enhanced crystalline quality of the donor SPSM.