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Effective Mg:Ag / MoO3 recombination zone for tandem organic photovoltaic devices

Published online by Cambridge University Press:  04 June 2015

A. R. Jeong ,
S. Wiesner ,
S. Fengler ,
M. Ch. Lux-Steiner  and
M. Rusu
A. R. Jeong
Affiliation:
Institut für Heterogene Materialsysteme, Helmholtz-Zentrum Berlin für Materialien und Energie, Lise-Meitner Campus, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
S. Wiesner
Affiliation:
Institut für Heterogene Materialsysteme, Helmholtz-Zentrum Berlin für Materialien und Energie, Lise-Meitner Campus, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
S. Fengler
Affiliation:
Institut für Heterogene Materialsysteme, Helmholtz-Zentrum Berlin für Materialien und Energie, Lise-Meitner Campus, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
M. Ch. Lux-Steiner
Affiliation:
Institut für Heterogene Materialsysteme, Helmholtz-Zentrum Berlin für Materialien und Energie, Lise-Meitner Campus, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
M. Rusu*
Affiliation:
Institut für Heterogene Materialsysteme, Helmholtz-Zentrum Berlin für Materialien und Energie, Lise-Meitner Campus, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
*
*rusu@helmholtz-berlin.de
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Abstract

We demonstrate an effective recombination zone consisting of Mg:Ag (1:3) alloy and MoO3 layers with 0.8 nm and 3 nm respectively for application in tandem organic photovoltaic devices based on zinc phthalocyanine (ZnPc) donor and fullerene C60 acceptor. The Mg:Ag layer ensures an optimum electron selectivity, while MoO3 layer effectively selects holes. A conversion efficiency of 2.2% has been achieved under an illumination of 100 mW/cm2 at room temperature. The open circuit voltage of 810 mV is close to the sum of the open circuit voltages of the constituent single cells. The recombination Mg:Ag-MoO3 layer system is investigated with regard to the requirements of high optical transparency, work function compatibility, and facilitation of light absorption. The respective characterizations were carried out by UV-Visible spectroscopy, Kelvin probe force microscopy in ultrahigh vacuum, current-voltage and external quantum efficiency methods.

Keywords

photovoltaicorganicdevices
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1737: Symposium U – Organic Photovoltaics—Fundamentals, Materials and Devices , 2015 , mrsf14-1737-u13-41
Copyright
Copyright © Materials Research Society 2015 

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References

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