Photonic Crystal Geometry for Organic
- Photonic Crystal Geometry for Organic
- 고두현; John R. Tumbleston; Lei Zhang; Stuart Williams; Joseph M. DeSimone; Rene Lopez; Edward T. Samulski
- Issue Date
- Nano letters
- VOL 9, NO 7, 2742-2746
- We report organic solar cells with a photonic crystal nanostructure embossed in the photoactive bulk heterojunction layer, a topography that exhibits a 3-fold enhancement of the absorption in specific regions of the solar spectrum in part through multiple excitation resonances. The
photonic crystal geometry is fabricated using a materials-agnostic process called PRINT wherein highly ordered arrays of nanoscale features are readily made in a single processing step over wide areas (∼4 cm2) that is scalable. We show efficiency improvements of ∼70% that result
not only from greater absorption, but also from electrical enhancements. The methodology is generally applicable to organic solar cells and the experimental findings reported in our manuscript corroborate theoretical expectations.
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