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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

» presentations   » 2017.03.22




Design and Application of NIR Absorbing Donator Materials for Efficient Organic Solar Cells

Sebastian Schellhammer, Frank Ortmann, and Gianaurelio Cuniberti

DPG Frühjahrstagung der Sektion Kondensierte Materie (SKM)

2017.03.22; Dresden, Germany

Recently, fluorene-functionalized aza-BODIPYs have been successfully applied as donor material in organic solar cells.[1] Optimized bulk heterojunction solar cells with C60 have yield power conversion efficiencies up to 4.5 %, rendering the compounds highly competitive among other NIR-absorbing small-molecule donor materials. Based on an analysis of electronic properties, internal reorganization energies, and the optical properties of more than 100 aza-BODIPYs we give guidelines for the design of further optimized materials for solar cell applications. The observed independence of most of the functionalization strategies makes them an ideal material class for tailor-made donor materials that can cover a broad range of absorption, charge transport, and energetic regimes.



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