Dresden 2017 – scientific programme

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DS: Fachverband Dünne Schichten

DS 47: Organic-Inorganic Hybride Interfaces

DS 47.8: Talk

Friday, March 24, 2017, 11:30–11:45, CHE 91

Analytical Study of Solution-Processed Nickel Oxide and its Application in Organic Electronics: (3) Application in Organic Solar Cells — •Jakob Bombsch^1,2,4, Sebastian Hietzschold^1,2,4, Valentina Rohnacher^2,4, Florian Ullrich^3,4, Robert Lovrincic^1,4, and Wolfgang Kowalsky^1,2,4 — ¹TU Braunschweig — ²Uni Heidelberg — ³TU Darmstadt — ⁴InnovationLab, Heidelberg

Nickel oxide (NiO) has shown promising properties as a carrier-selective hole contact material with high transparency, and a good matching ionization potential to most donor materials [1,2]. Here we apply solution-processed NiO films as an interlayer in small molecule flat- and bulk-heterojunction solar cells with F4ZnPc and C60 as a donor and acceptor, respectively, and correlate the observed IV-characteristics with annealing temperature, thickness, and surface post-treatment of the NiO layer. While oxygen plasma treatment improves device performance, the application of dipolar self-assembled monolayers lead to strongly S-shaped IV curves. To examine the nature of the barrier introduced, we vary the doping density of the NiO film by adding copper oxide. Together with data from Infrared spectroscopy and Photoelectron spectroscopy measurements, we gain a more fundamental understanding of the impact of NiO surface properties on solar cell performance. [1] Manders, J. R. Et al. Adv. Funct. Mater., 23: 2993-3001 (2013). [2] Schulz, P. et al. Adv. Funct. Mater. 24, 701-706 (2014).