HOPV12 - Blogs

4 th Hybrid and Organic Photovoltaic Conference -Uppsala 2012 73
B31 - Cosensitization and multichromophore light harvesting in hybrid devices
Katja Willinger, Christoph Hunger, Mukundan Thelakkat
Applied Functional Polymers, University of Bayreuth, Universitystr-30, Bayreuth, 95440, DE
We present innovative concepts of multichromophore light harvesting in hybrid blend
devices [1] and highly efficient cosensitization of organic dyes in solid-state dye-sensitized
solar cells. The synthesis and charcterization of some novel organic dyes belonging to the class
of BODIPY, triphenyldiamine [2] and squaraines [3] and the UV-vis absorption properties under
various conditions of chemisorption are described. The structure-property relationship in a
series of BODIPY dyes carrying suitable anchor groups and donor-antenna groups will be
explained. Further, the application of individual dyes in devices are described.
Figure 1 Scheme of preparation of dye-coated nanocrystals and device structure of multichromophore sensitized
hybrid blend solar cell
Two types of devices sensitized using a combination of dyes will be presented. In the first
case of multichromophore light harvesting, the principle of hybrid blend was used to
demonstrate the potential of this concept, which is suitable for room temperature fabrication
of large area devices. In the second type, cosensitized solid-state dye sensitized devices are
described. Both concepts have high potentials in improving light harvesting in solid-state
devices. Especially the hybrid blend concept can be adapted to tandem hybrid cells and for
extending the absorption by using a combination of any number of dyes. The achievemnents,
perspectives and limitations will be discussed in the contribution
References
[1] Bandara,J.; Gräf, K.;Thelakkat,M."Multichromophore light harvesting in hybrid solar cells" Phys. Chem. Chem.
Phys.13, 12906–12911 (2011).
[2] Erten-Ela,S.; Brendel,J.; Thelakkat,M. "Solid-state dye-sensitized solar cells fabricated with nanoporous TiO2 and
TPD dyes: Analysis of penetration behavior and I-V characteristics,Chemical physics letters, 510, 93-98, (2011).
[3] Kolemen,S.; Cakmak,Y.; Erten-Ela, S.; Altay, Y.; Brendel,J.; Thelakkat,M.; Akkaya, E. "Solid-State Dye-Sensitized
Solar Cells Using Red and Near-IR Absorbing Bodipy Sensitizers" Org. Lett., 12, 3812-3815 (2010)
© SEFIN 2012