Printable luminescent down shifter for enhancing efficiency and stability of organic photovoltaics

Kettle, J., Bristow, N., Gethin, D.T., Tehrani, Z., Moudam, O., Li, B., Katz, E.A., dos Reis Benatto, G.A. and Krebs, F.C. (2016) Printable luminescent down shifter for enhancing efficiency and stability of organic photovoltaics. Solar Energy Materials and Solar Cells, 144, pp. 481-487. (doi: 10.1016/j.solmat.2015.09.037)

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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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Kettle, Dr Jeff
Authors: Kettle, J., Bristow, N., Gethin, D.T., Tehrani, Z., Moudam, O., Li, B., Katz, E.A., dos Reis Benatto, G.A., and Krebs, F.C.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Solar Energy Materials and Solar Cells
Publisher:Elsevier
ISSN:0927-0248
ISSN (Online):1879-3398
Published Online:23 October 2015

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