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- Title
In-Situ Energy Dispersive X-ray Reflectivity Applied to Polyoxometalate Films: An Approach to Morphology and Interface Stability Issues in Organic Photovoltaics.
- Authors
Generosi, Amanda; Guaragno, Marco; Zhu, Qirong; Proust, Anna; Barrett, Nicholas T.; Tortech, Ludovic; Paci, Barbara
- Abstract
Organic solar cells, characterized by a symmetrical regular layered structure, are very promising systems for developing green, low cost, and flexible solar energy conversion devices. Despite the efficiencies being appealing (over 17%), the technological transfer is still limited by the low durability. Several processes, in bulk and at interface, are responsible. The quick downgrading of the performance is due to a combination of physical and chemical degradations. These phenomena induce instability and a drop of performance in working conditions. Close monitoring of these processes is mandatory to understand the degradation pathways upon device operation. Here, an unconventional approach based on Energy Dispersive X-ray Reflectivity (ED-XRR) performed in-situ is used to address the role of Wells–Dawson polyoxometalate (K6-P2W18O62, hereafter K6-P2W18) as hole transporting layer in organic photovoltaics. The results demonstrate that K6-P2W18 thin films, showing ideal bulk and interface properties and superior optical/morphological stability upon prolonged illumination, are attractive candidates for the interface of durable OPV devices.
- Subjects
INTERFACE stability; SOLAR energy conversion; SOLAR cells; X-rays; TECHNOLOGY transfer; PHOTOVOLTAIC power systems
- Publication
Symmetry (20738994), 2020, Vol 12, Issue 8, p1240
- ISSN
2073-8994
- Publication type
Article
- DOI
10.3390/sym12081240