This work was financially supported by Solarmer Energy Inc., UC Discovery Grant (Grant No. GCP05-10208), and Office of Navy Research (Grant No. N00014-01-1-0136, program manager Dr. Paul Armistead). We appreciate Mr. Hyun Cheol Lee for the help on TEM measurement and Dr. Yue Wu for helpful discussion.
Effects of Solvent Mixtures on the Nanoscale Phase Separation in Polymer Solar Cells†
Article first published online: 10 JUN 2008
Copyright © 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Functional Materials
Volume 18, Issue 12, pages 1783–1789, June 24, 2008
How to Cite
Yao, Y., Hou, J., Xu, Z., Li, G. and Yang, Y. (2008), Effects of Solvent Mixtures on the Nanoscale Phase Separation in Polymer Solar Cells. Adv. Funct. Mater., 18: 1783–1789. doi: 10.1002/adfm.200701459
- Issue published online: 18 JUN 2008
- Article first published online: 10 JUN 2008
- Manuscript Revised: 25 JAN 2008
- Manuscript Received: 13 DEC 2007
- Solarmer Energy Inc.
- UC Discovery Grant. Grant Number: GCP05-10208
- Office of Navy Research. Grant Number: N00014-01-1-0136
- solvent effect;
- solar cells;
- organic electronics;
- nanostructured materials
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.