A universal method to form the equivalent ohmic contact for efficient solution-processed organic tandem solar cells - Li, Ning; Stubhan, Tobias; Krantz, Johannes; Machui, Florian; Turbiez, Mathieu; Ameri, Tayebeh; Brabec, Christoph J. (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2016)