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

J. Kettle, N. Bristow, D. T. Gethin, Z. Tehrani, O. Moudam, B. Li, E. A. Katz, G. A. Dos Reis Benatto, F. C. Krebs

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

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.

Original languageEnglish
Pages (from-to)481-487
Number of pages7
JournalSolar Energy Materials and Solar Cells
Volume144
DOIs
StatePublished - 1 Jan 2016

Keywords

  • Degradation
  • Luminescent material
  • Organic photovoltaics
  • Outdoor performance
  • UV filter

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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