Münster 2017 – wissenschaftliches Programm

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AKE: Arbeitskreis Energie

AKE 2: Renewable Energy: Photovoltaics

AKE 2.1: Hauptvortrag

Montag, 27. März 2017, 11:00–11:30, S Aula

Roadmap and roadblocks for multi-junction device technology based on metal halide perovskites — •Eva Unger — Department of Chemistry, Lund University, Lund, Sweden — Helmholtz Center Berlin for Materials and Energy, Berlin, Germany

Solar cells based on metal-halide perovskite semiconductors inspire high hopes for efficient low-cost solar cell technology. These materials are promising to realize efficient tandem solar cell technology compatible with conventional solar cell technology based on silicon. Multi-junction solar cell devices with efficiencies exceeding 30% could be achieved by boosting silicon solar panels with a device based on absorber materials with optical band gaps of about 1.7 eV. In this respect, the ease of tuning the optical properties of metal halide perovskite materials and the possibility to achieve highly efficient devices entirely by solution-based deposition methods make this class of evolving semiconductors an ideal case to develop low-cost and scalable multi-junction device technology. This talk will give an overview over the state of the art and current performance metrics of metal-halide perovskite device technology. Close to the ideal band gap for absorbers for tandem solar cell stacks of 1.7 eV, the onset of photo-induced halide migration becomes limiting to the open circuit voltage indicating an intriguing but potentially hampering intrinsic properties of metal halide perovskites to their application in solar energy conversion devices.