Decoupling optical and electronic optimization of organic solar cells using high-performance temperature-stable TiO2/Ag/TiO2 electrodes

Kwang-Dae Kim; Thomas Pfadler; Eugen Zimmermann; Yuyi Feng; James A. Dorman; Jonas Weickert; Lukas Schmidt-Mende

doi:10.1063/1.4933414

APL Materials (Oct 2015)

Decoupling optical and electronic optimization of organic solar cells using high-performance temperature-stable TiO2/Ag/TiO2 electrodes

Kwang-Dae Kim,
Thomas Pfadler,
Eugen Zimmermann,
Yuyi Feng,
James A. Dorman,
Jonas Weickert,
Lukas Schmidt-Mende

Affiliations

Kwang-Dae Kim: Department of Physics, University of Konstanz, P.O. Box 680, 78467 Constance, Germany
Thomas Pfadler: Department of Physics, University of Konstanz, P.O. Box 680, 78467 Constance, Germany
Eugen Zimmermann: Department of Physics, University of Konstanz, P.O. Box 680, 78467 Constance, Germany
Yuyi Feng: Department of Physics, University of Konstanz, P.O. Box 680, 78467 Constance, Germany
James A. Dorman: Louisiana State University, Chemical Engineering Building, Baton Rouge, Louisiana 70803, USA
Jonas Weickert: Department of Physics, University of Konstanz, P.O. Box 680, 78467 Constance, Germany
Lukas Schmidt-Mende: Department of Physics, University of Konstanz, P.O. Box 680, 78467 Constance, Germany

DOI: https://doi.org/10.1063/1.4933414
Journal volume & issue: Vol. 3, no. 10
pp. 106105 – 106105-8

Abstract

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An electrode structured with a TiO2/Ag/TiO2 (TAT) multilayer as indium tin oxide (ITO) replacement with a superior thermal stability has been successfully fabricated. This electrode allows to directly tune the optical cavity mode towards maximized photocurrent generation by varying the thickness of the layers in the sandwich structure. This enables tailored optimization of the transparent electrode for different organic thin film photovoltaics without alteration of their electro-optical properties. Organic photovoltaic featuring our TAT multilayer shows an improvement of ∼12% over the ITO reference and allows power conversion efficiencies (PCEs) up to 8.7% in PTB7:PC71BM devices.

Published in APL Materials

ISSN: 2166-532X (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Technology: Chemical technology: Biotechnology; Science: Physics
Website: http://aplmaterials.aip.org

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