https://doi.org/10.1051/epjconf/201819002011
Non-radiative processes in metal halide perovskite semiconductors probed by photoluminescence microscopy
1
Chemical Physics and NanoLund, Lund University, PO Box 124, SE-22100, Lund, Sweden
2
School of Chem. & Chem. Engineering, Nanjing University, 22 Hankou Rd, Nanjing 210023, China
3
Department of Chemistry, KU Leuven, Celestijenlaan 200F, B-3001 Leuven, Belgium
4
Helmholtz-Zentrum Berlin für Mater. und Energie GmbH, Kekulestraße 5, 12489 Berlin, Germany
* Corresponding author: ivan.scheblykin@chemphys.lu.se
Published online: 26 September 2018
Organo metal halide perovskites are solution processed semiconductors that recently attracted a great attention. They possess a rather “soft” and (photo) chemically active solid structure allowing for ion migration and other mass diffusion processes. This is a likely reason why non-radiative recombination centres in these materials are activated and deactivated on relatively slow time-scales. This dynamics reveals as photoluminescence (PL) fluctuations (blinking) of individual microcrystals and local areas of films and allows for application of a broad range of single molecule spectroscopy methods including optical super-resolution. Studying PL blinking resolves properties of individual non-radiative centres and helps to unravel their chemical nature.
© The Authors, published by EDP Sciences, 2018
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