Resonant cavity enhanced light harvesting in flexible thin-film organic solar cells

Nicholas P. Sergeant, Bjoern Niesen, Albert S. Liu, Lee Boman, Chris Stoessel, Paul Heremans, Peter Peumans, Barry P. Rand, Shanhui Fan

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Dielectric/metal/dielectric (DMD) electrodes have the potential to significantly increase the absorption efficiency and photocurrent in flexible organic solar cells. We demonstrate that this enhancement is attributed to a broadband cavity resonance. Silver-based semitransparent DMD electrodes with sheet resistances below 10 ohm/sq. are fabricated on flexible polyethylene terephthalate (PET) substrates in a high-throughput roll-to-roll sputtering tool. We carefully study the effect of the semitransparent DMD electrode (here composed of ZnxSnyOz/Ag/InxSn yOz) on the optical device performance of a copper phthalocyanine (CuPc)/fullerene (C60) bilayer cell and illustrate that a resonant cavity enhanced light trapping effect dominates the optical behavior of the device.

Original languageEnglish (US)
Pages (from-to)1431-1433
Number of pages3
JournalOptics Letters
Volume38
Issue number9
DOIs
StatePublished - May 1 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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