Optical waveguide enhanced photovoltaics

Sven Rühle, Shlomit Greenwald, Elad Koren, Arie Zaban

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Enhanced light to electric power conversion efficiency of photovoltaic cells with a low absorbance was achieved using waveguide integration. We present a proof of concept using a very thin dye-sensitized solar cell which absorbed only a small fraction of the light at normal incidence. The glass substrate in conjunction with the solar cells reflecting back contact formed a planar waveguide, which lead to more than four times higher conversion efficiency compared to conventional illumination at normal incidence. This illumination concept leads to a new type of multi-junction PV systems based on enforced spectral splitting along the waveguide.

Original languageEnglish
Pages (from-to)21801-21806
Number of pages6
JournalOptics Express
Issue number26
StatePublished - 22 Dec 2008


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