Optical modeling and realization of transparent multilayer electrode and their application for solar cells

Bernard Ratier^a, Bruno Lucas^a, Sylvain Vedraine^a, Mahfoudh Raïssi^a, Richard Garuz^a, Malika Chalh^a

^aXLIM, University of Limoges, Faculty of science and Technology, 123 avenue Albert Thomas 8700 Limoges XLIM Research Institute UMR CNRS 6172, France

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Sylvain Vedraine, 074
Publication date: 5th February 2015

Nowadays, the transparent electrode (TE) mostly used is the indium tin oxide (ITO) because it presents many advantages such as high transmission and low sheet resistance due to a low resistivity.[1] Nevertheless, ITO has some drawbacks such as indium scarcity, aggressive technique of deposits for organic materials.[1] Therefore, the silver nanowires (AgNWs) have been explored as an alternative. The use of AgNWs as a metallic layer in the multilayer structure Oxide/Metal/Oxide (OMO) has demonstrated good optical and electrical properties.[2] A study is performed on silver nanowires embedded between two layers of zinc oxide nanoparticles. The impact of AgNWs on the optical properties of the ZnO/AgNWs/ZnO (ZAZ) multilayer structure is numerically investigated using a Finite Difference Time Domain (FDTD) method. We also realized ZAZ multilayer using spin-coating., These ZAZ multilayer were experimentally optimized and exhibit a low sheet resistance and a high optical transmission. These electrodes were successfully integrated in an inverted organic solar cell. The photovoltaic performances are compared to an organic solar cell using an ITO electrode.

1. Vedraine, S.; El Hajj, A.; Torchio, P.; Lucas, B. Optimized ITO-free tri-layer electrode for organic solar cells, Org. Electronics 2013, 14, 1122-1129. 2. Kim, A.; Won, Y.; Woo, K.; Kim, H.-H.; Moon, J. Highly Transparent Low Resistance ZnO/Ag Nanowire/ZnO Composite Electrode for Thin Film Solar Cells, ACS Nano 2013, 7, 1081.

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