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Effects of Solvent Mixtures on the Nanoscale Phase Separation in Polymer Solar Cells
Author(s) -
Yao Yan,
Hou Jianhui,
Xu Zheng,
Li Gang,
Yang Yang
Publication year - 2008
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200701459
Subject(s) - materials science , nanoscopic scale , polymer , solvent , solubility , chemical engineering , phase (matter) , active layer , hildebrand solubility parameter , solar cell , spin coating , acceptor , polymer solar cell , organic solar cell , x ray photoelectron spectroscopy , layer (electronics) , coating , nanotechnology , organic chemistry , composite material , optoelectronics , chemistry , physics , condensed matter physics , engineering , thin film transistor
The mixed solvent approach has been demonstrated as a promising method to modify nanomorphology in polymer solar cells. This work aims to understand the unique role of the additive in the mixture solvent and how the optimized nanoscale phase separation develops laterally and vertically during the non‐equilibrium spin‐coating process. We found the donor/acceptor components in the active layer can phase separate into an optimum morphology with the additive. Supported by AFM, TEM and XPS results, we proposed a model and identified relevant parameters for the additive such as solubility and vapor pressures. Other additives are discovered to show the ability to improve polymer solar cell performance as well.