Solvent Additive Effects on Small Molecule Crystallization in Bulk Heterojunction Solar Cells Probed During Spin Casting

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 duri...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2013-11, Vol.25 (44), p.6380-6384
Main Authors: Perez, Louis A., Chou, Kang Wei, Love, John A., van der Poll, Thomas S., Smilgies, Detlef-M., Nguyen, Thuc-Quyen, Kramer, Edward J., Amassian, Aram, Bazan, Guillermo C.
Format: Article
Language:English
Subjects:
bulk heterojunction (BHJ) solar cells
Crystallization
Glass - chemistry
organic photovoltaics (OPV)
Polystyrenes - chemistry
Solar Energy
solution processable small molecules
solvent additive processing
Solvents - chemistry
thin film morphology
Thiophenes - chemistry
Tin Compounds - chemistry
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Summary: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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201302389