Publications associated with Advanced Functional Materials and Devices Group

Electroabsorption studies of organic p-i-n solar cells: Evaluating the built-in voltage

Materials Research Society Symposium Proceedings 1639 (2014)

E Siebert-Henze, VG Lyssenko, R Brückner, M Riede, K Leo

We investigate the built-in voltage in organic bulk heterojunction solar cells using electroabsorption spectroscopy based on the Stark effect, i.e. the variation of the absorption energies of a material caused by an electric field. Due to spectral contributions of permanent dipoles, a novel approach for evaluating the EA spectra is required. We use a fitting routine analyzing a broad spectral range instead of using only a single wavelength. A reliable quantitative determination of the built-in voltage is achieved. Copyright © Materials Research Society 2014.

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