bei Google ScholarTitelangaben
Wöpke, Christopher ; Göhler, Clemens ; Saladina, Maria ; Du, Xiaoyan ; Nian, Li ; Greve, Christopher ; Zhu, Chenhui ; Yallum, Kaila M. ; Hofstetter, Yvonne J. ; Becker-Koch, David ; Li, Ning ; Heumüller, Thomas ; Milekhin, Ilya ; Zahn, Dietrich R. T. ; Brabec, Christoph J. ; Banerji, Natalie ; Vaynzof, Yana ; Herzig, Eva M. ; MacKenzie, Roderick C. I. ; Deibel, Carsten:
Traps and transport resistance are the next frontiers for stable non-fullerene acceptor solar cells.
In: Nature Communications.
Bd. 13
(2022)
.
- 3786.
ISSN 2041-1723
DOI: https://doi.org/10.1038/s41467-022-31326-z
Abstract
Stability is one of the most important challenges facing material research for organic solar cells (OSC) on their path to further commercialization. In the high-performance material system PM6:Y6 studied here, we investigate degradation mechanisms of inverted photovoltaic devices. We have identified two distinct degradation pathways: one requires the presence of both illumination and oxygen and features a short-circuit current reduction, the other one is induced thermally and marked by severe losses of open-circuit voltage and fill factor. We focus our investigation on the thermally accelerated degradation. Our findings show that bulk material properties and interfaces remain remarkably stable, however, aging-induced defect state formation in the active layer remains the primary cause of thermal degradation. The increased trap density leads to higher non-radiative recombination, which limits the open-circuit voltage and lowers the charge carrier mobility in the photoactive layer. Furthermore, we find the trap-induced transport resistance to be the major reason for the drop in fill factor. Our results suggest that device lifetimes could be significantly increased by marginally suppressing trap formation, leading to a bright future for OSC.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung - Juniorprof. Dr. Eva M. Herzig Fakultäten Fakultäten > Fakultät für Mathematik, Physik und Informatik |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Eingestellt am: | 25 Jul 2022 07:03 |
| Letzte Änderung: | 09 Okt 2023 12:55 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/70699 |