Effects of solvent additive on "s-shaped" curves in solution-processed small molecule solar cells
- A novel molecular chromophore, p-SIDT(FBTThCA8)(2), is introduced as an electron-donor material for bulk heterojunction (BHJ) solar cells with broad absorption and near ideal energy levels for the use in combination with common acceptor materials. It is found that films cast from chlorobenzene yield devices with strongly s-shaped current-voltage curves, drastically limiting performance. We find that addition of the common solvent additive diiodooctane, in addition to facilitating crystallization, leads to improved vertical phase separation. This yields much better performing devices, with improved curve shape, demonstrating the importance of morphology control in BHJ devices and improving the understanding of the role of solvent additives.
| Author details: | John A. Love, Shu-Hua Chou, Ye Huang, Guillermo C. Bazan, Thuc-Quyen Nguyen |
|---|---|
| DOI: | https://doi.org/10.3762/bjoc.12.249 |
| ISSN: | 1860-5397 |
| Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/28144323 |
| Title of parent work (English): | Beilstein journal of organic chemistry |
| Publisher: | Beilstein-Institut zur Förderung der Chemischen Wissenschaften |
| Place of publishing: | Frankfurt, Main |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2016 |
| Publication year: | 2016 |
| Release date: | 2020/03/22 |
| Tag: | current voltage analysis; morphology; organic solar cells |
| Volume: | 12 |
| Number of pages: | 13 |
| First page: | 2543 |
| Last Page: | 2555 |
| Funding institution: | Office of Naval Research [N000141410076]; Camille Dreyfus Teacher Scholar Award; Stanford Synchrotron Radiation Light source (SSRL) - U.S. Department of Energy |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Peer review: | Referiert |
