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HL: Fachverband Halbleiterphysik

HL 14: PhD-Symposium: Photoluminescence of halide perovskites:
What does it tell us and what not? (joint session DS/HL/AKjDPG)

HL 14.1: Hauptvortrag

Dienstag, 2. April 2019, 09:30–10:00, H32

Photoluminescence Analysis of Thin Films: What can it tell us about (Perovskite) Solar Cells? — •Thomas Unold — Helmholtz-Zentrum Berlin für Materialien und Energy

Photoluminescence analysis has been an important analytical tool in semiconductor characterization, and depending on the experimental conditions can reveal detailed information about various optical and electronic properties such as radiative recombination, non-radiative recombination, defects, carrier trapping and the quasi-Fermi level splitting[1-4]. The technique can be applied to thin films as well as to complete solar cell devices, but may require additional analysis to consider the presence of either free surfaces or built-in electrical fields, additional recombination processes as well as partial charge extraction. In the ideal case different types of luminescence measurements yield a consistent picture of the material properties and the limitations of device performance. Different aspects of such photoluminescence analyses will discused with a special focus on how results obtained on (hybrid) perosvkites comply with the state-of-the-art knowledge on more common inorganic semiconductor materials. [1] T. Unold, L. Gütay, in Advanced Characterization Techniques for Thin Film Solar Cells, Wiley VCH (2011) 151-175. doi.org/10.1002/9783527636280.ch7 [2] F. Staub et al., Phys. Review Applied 6 (2016) 044017 [3] C. Hages et al., Adv. Energy Mater. 7(2017) 1700167 [4] M. Stolterfoht et al., Nature Energy 3 (2018) 847.