Dresden 2009 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

SYOP: Symposium Organic Photovoltaics: From Single Molecules to Devices

SYOP 4: Organic Photovoltaics: from Single Molecules to Devices

SYOP 4.75: Poster

Donnerstag, 26. März 2009, 16:30–19:00, P1A

Bulk-Heterojuction Solar Cells Based on Nanocrystal-Polymer Hybrid Materials — •Yunfei Zhou1,2, Gerald Urban2, and Michael Krueger1,21Freiburg Materials Research Centre (FMF), University of Freiburg, Germany — 2Department of Microsystems Engineering (IMTEK), University of Freiburg, Germany

Organic solar cells have the promising advantages of low-cost and large-area fabrication on flexible substrates. State-of-the-art organic solar cells based on blends of conjugated polymers and fullerene derivatives achieve efficiencies up to 5-6%.

Inorganic semiconductor nanocrystals (NCs) e.g. out of CdSe, with tunable bandgaps and high intrinsic carrier mobilities, can be incorporated into conjugated polymers e.g. poly(3-hexylthiophene) (P3HT) to form bulk-heterojunction hybrid solar cells. In our group, a highly reproducible synthesis method for CdSe NCs has been developed, leading to monodisperse NCs with excellent photophysical properties. Current research is performed to control the shape and the lattice structure of the NCs within the same synthesis approach. Various solar cells based on bulk-heterojunction nanocomposite materials have been fabricated and characterized. We systematically checked how the solar cell device performance is affected by different NC ligands and by different thermal annealing treatments. Devices using spherical NCs capped with aromatic ligands and appropriate thermal annealing treatment exhibit so far power conversion efficiencies over 0.5% under standard measurement condition. Further investigations to improve the materials and device performance are currently in progress.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2009 > Dresden