Dresden 2017 – scientific programme
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DS: Fachverband Dünne Schichten
DS 24: Fundamentals of Perovskite Photovoltaics IV (jointly with CPP/HL)
DS 24.7: Talk
Tuesday, March 21, 2017, 15:45–16:00, ZEU 222
Monolithic serial interconnection of perovskite solar cells using laser ablation — •Felix Schneider1, Christof Schultz1, Rutger Schlatmann1,2, Steve Albrecht3, and Bert Stegemann1 — 1HTW Berlin - University of Applied Sciences, Wilhelminenhofstr. 75a, 12459 Berlin, Germany — 2Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, PVcomB, Schwarzschildstr. 3, 12489 Berlin, Germany — 3Helmholtz-Zentrum Berlin, Institut für Silizium-Photovoltaik, Kekuléstraße 5, 12489 Berlin, Germany
Based on recent work on serial interconnection of thin film solar cells by laser ablation, the proper laser parameters for scribing planar, inverted perovskite solar cell samples were determined. A device design with the layer sequence ITO/PTAA/perovskite/PCBM/Ag was used in which the P1 scribes the ITO, the P2 separates the perovskite and the selective contact layers and the P3 the metal electrode. As a result, successful P1 to P3 laser scribes with sufficiently small area losses, i.e. small dead areas, were obtained. Degradation due to humidity of the perovskite layer during laser scribing was avoided by complete laser processing in nitrogen atmosphere. Detailed characterization of the sample composition by energy dispersive x-ray spectroscopy, the morphology by atomic force microscopy as well as of the electrical functionality of the P2 scribes will be provided. The influence of laser-induced material modifications in the vicinity of the laser scribes on the module performance will be discussed.