Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 61: Posters III (Organic-inorganic perovskite semiconductors; Organic photovoltaics and electronics; Photovoltaics; Energy science; New materials and concepts)

HL 61.11: Poster

Wednesday, March 18, 2015, 15:00–20:00, Poster F

Processing Optimization for Vacuum Deposited Perovskite Layers — Enkhtur Erdenebileg, Lauren E. Polander, Christian Körner, and •Karl Leo — Instutut für Angewandte Photophysik, Technische Universität Dresden, 01069 Dresden, Germany

Organic-inorganic hybrid perovskites currently attract considerable attention as promising light harvesting materials for solar cells due to their panchromatic absorption, excellent charge-transport characteristics, and ease of fabrication from inexpensive, commercially available materials. As a result of many recent advances related to changes in the stack design and processing conditions, the power conversion efficiency values for this new class of solar cells is increasing rapidly. Extremely uniform perovskite films can be formed using dual source vapor deposition of PbX2 and CH3NH3X (where X = I, Br, Cl) to yield high performance devices when used in combination with either solution-processed or vacuum-deposited transport layers. In this work, we optimize the vapor deposition of perovskite layers by investigating the effects of evaporation and annealing temperature on the properties of isolated perovskite films. The films are thoroughly examined using UV-vis absorption spectroscopy, grazing incidence X-ray diffraction, and scanning electron microscopy. The newly developed deposition conditions are then applied to fabricate optimized perovskite solar cells with vapor-deposited electron- and hole-transport layers.