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Open AccessArticle

Effects of Germanium Tetrabromide Addition to Zinc Tetraphenyl Porphyrin / Fullerene Bulk Heterojunction Solar Cells

Department of Materials Science, The University of Shiga Prefecture, 2500 Hassaka, Hikone, Shiga 522-8533, Japan
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Electronics 2014, 3(1), 112-121; https://doi.org/10.3390/electronics3010112
Received: 15 January 2014 / Revised: 1 February 2014 / Accepted: 24 February 2014 / Published: 4 March 2014
(This article belongs to the Special Issue Organic Semiconductors)
The effects of germanium tetrabromide addition to tetraphenyl porphyrin zinc (Zn-TPP)/fullerene (C60) bulk heterojunction solar cells were characterized. The light-induced charge separation and charge transfer were investigated by current density and optical absorption. Addition of germanium tetrabromide inserted into active layer of Zn-TPP/C60 as bulk heterojunction had a positive effect on the photovoltaic and optical properties. The photovoltaic mechanism of the solar cells was discussed by experimental results. The photovoltaic performance was due to light-induced exciton promoted by insert of GeBr4 and charge transfer from HOMO of Zn-TPP to LUMO of C60 in the active layer. View Full-Text
Keywords: porphyrin; fullerene; organic solar cell; X-ray diffraction; transmission electron microscopy porphyrin; fullerene; organic solar cell; X-ray diffraction; transmission electron microscopy
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Suzuki, A.; Nishimura, K.; Oku, T. Effects of Germanium Tetrabromide Addition to Zinc Tetraphenyl Porphyrin / Fullerene Bulk Heterojunction Solar Cells. Electronics 2014, 3, 112-121.

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