Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6534944 | Solar Energy Materials and Solar Cells | 2016 | 7 Pages |
Abstract
The proof of concept of using luminescent down shifting (LDS) layers as alternative UV filters for P3HT:PCBM OPVs is demonstrated using a lanthanide-based metal complex. The results are verified using a combination of indoor light soaking, with single cell devices, and outdoor performance monitoring, using a 16-cell monolithically connected OPV module. By applying the LDS layer, a ~5% relative enhancement in photocurrent is observed for both sets of devices. More significantly, indoor light soaking tests on single cell devices without encapsulation showed an 850% enhancement in the measured half-life (T50%). The OPV modules were encapsulated and tested for outdoor stability over a 70 day period in the Negev desert, Israel. The modules made with the LDS filter are shown to match the stability of those made with a commercial UV filter and outperform the modules with no filter applied, with a 51% enhancement in the measured stability (T75%). Significantly, the work provides clear experimental evidence that the LDS layer can act as a UV filter in OPVs without compromising the efficiency of the solar cell, thus providing an added benefit over commercial UV filters.
Related Topics
Physical Sciences and Engineering
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Authors
J. Kettle, N. Bristow, D.T. Gethin, Z. Tehrani, O. Moudam, B. Li, E.A. Katz, G.A. dos Reis Benatto, F.C. Krebs,