Journal article
Comparative studies of photochemical cross-linking methods for stabilizing the bulk hetero-junction morphology in polymer solar cells
Department of Energy Conversion and Storage, Technical University of Denmark1
Functional organic materials, Department of Energy Conversion and Storage, Technical University of Denmark2
Imaging and Structural Analysis, Department of Energy Conversion and Storage, Technical University of Denmark3
We are here presenting a comparative study between four different types of functionalities for cross-linking. With relatively simple means bromine, azide, vinyl and oxetane could be incorporated into the side chains of the low band-gap polymer TQ1. Cross-linking of the polymers was achieved by UV-light illumination to give solvent resistant films and reduced phase separation and growth of PCBM crystallites in polymer:PCBM films.
The stability of solar cells based on the cross-linked polymers was tested under various conditions. This study showed that cross-linking can improve morphological stability but that it has little influence on the photochemical stability which is also decisive for stable device operation under constant illumination conditions.
Language: | English |
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Publisher: | The Royal Society of Chemistry |
Year: | 2012 |
Pages: | 24417-24423 |
ISSN: | 13645501 and 09599428 |
Types: | Journal article |
DOI: | 10.1039/c2jm34284g |
ORCIDs: | Vesterager Madsen, Morten , Norrman, Kion , Jørgensen, Mikkel and Krebs, Frederik C |