|Publication type:||Article in scientific journal|
|Type of review:||Peer review (publication)|
|Title:||Aluminum electrode insulation dynamics via interface oxidation by reactant diffusion in organic layers|
Schubert, Ulrich S.
|Published in:||Physica status solidi A|
|Publisher / Ed. Institution:||Wiley|
|Abstract:||Appreciable progress has been achieved in the development of organic photovoltaics (OPV) over the last decade. However, further improvement of operational stability remains a challenge. In this contribution, focus is placed on corrosion and delamination of the metal contact, which are mainly caused by oxygen or water vapor ingress but in other cases also via mechanical wear and different thermal expansion coefficients. So‐called pinholes and electrode edges provide pathways for ingress of water vapor and oxygen, which may attack the metal–organic interface. Thus, electrical insolation via formation of insulating metal oxide and concomitant mechanical delamination occurs. As charge injection and extraction is suppressed at insulated and delaminated areas, the active area contributing to power conversion gets reduced. This work links analytical and numerical predictions about the active area in contact with the electrode to experimentally observe dependencies. Spatially and time‐resolved electroluminescence measurements provide information on location, size, and growth‐rate of insulated areas. Area loss rates for dark spots depend either sub‐linear (for early stages and edge‐ingress) or linear (later stages) on time. The initial defect size has a clear impact on growth rates. Furthermore, it has possible to demonstrate titanium oxide interlayers to slow down this type of extrinsic degradation.|
|Further description:||Article 1800474|
|Fulltext version:||Published version|
|License (according to publishing contract):||Licence according to publishing contract|
|Departement:||School of Engineering|
|Organisational Unit:||Institute of Computational Physics (ICP)|
|Appears in collections:||Publikationen School of Engineering|
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Fluhr, D., Züfle, S., Muhsin, B., Öttking, R., Seeland, M., Roesch, R., Schubert, U. S., Ruhstaller, B., Krischok, S., & Hoppe, H. (2018). Aluminum electrode insulation dynamics via interface oxidation by reactant diffusion in organic layers. Physica status solidi A, 215(23). https://doi.org/10.1002/pssa.201800474
Fluhr, D. et al. (2018) ‘Aluminum electrode insulation dynamics via interface oxidation by reactant diffusion in organic layers’, Physica status solidi A, 215(23). Available at: https://doi.org/10.1002/pssa.201800474.
D. Fluhr et al., “Aluminum electrode insulation dynamics via interface oxidation by reactant diffusion in organic layers,” Physica status solidi A, vol. 215, no. 23, 2018, doi: 10.1002/pssa.201800474.
Fluhr, Daniel, et al. “Aluminum electrode insulation dynamics via interface oxidation by reactant diffusion in organic layers.” Physica status solidi A, vol. 215, no. 23, 2018, https://doi.org/10.1002/pssa.201800474.
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