Dresden 2017 – wissenschaftliches Programm
CPP 64.8: Vortrag
Freitag, 24. März 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 Bombsch1,2,4, Sebastian Hietzschold1,2,4, Valentina Rohnacher2,4, Florian Ullrich3,4, Robert Lovrincic1,4, and Wolfgang Kowalsky1,2,4 — 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.  Manders, J. R. Et al. Adv. Funct. Mater., 23: 2993-3001 (2013).  Schulz, P. et al. Adv. Funct. Mater. 24, 701-706 (2014).