Study of static and dynamic disorder in organic-inorganic halide perovskites

0502219 - FZÚ 2019 ES eng A - Abstract
Schönfeldová, Tereza - Holovský, Jakub - Hájková, Zdeňka - Abelová, Lucie - Neykova, Neda - Stuchlíková, Hana - Kočka, Jan - De Wolf, S. - Fejfar, Antonín - Ledinský, Martin
Study of static and dynamic disorder in organic-inorganic halide perovskites.
Proceedings of International Conference on Hybrid and Organic Photovoltaics /10./ (HOPV18). Valencia: Fundació Scito, 2018 - (Palomares, E.; Janssen, R.)
[International Conference on Hybrid and Organic Photovoltaics /10./. 28.05.2018-31.05.2018, Benidorm]
R&D Projects: GA ČR GJ17-26041Y
Institutional support: RVO:68378271
Keywords : organic-inorganic halide perovskites * Fourier-transform photocurrent spectroscopy * photoluminescence
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

Using two different techniques, Fourier-transform photocurrent spectroscopy (FTPS) and photoluminescence (PL), we have probed the temperature dependence of methylammonium lead iodide (MALI) absorption spectra to be able to distinguish the static and dynamic part of Urbach energy. We extract the Urbach energy as the reciprocal value of the slope of the absorption at the band edge plotted in logarithmic scale. Its value depends on the material disorder and generally correlates well with the loss in the open-circuit voltage (VOC) of optimized cells, compared to their bandgap, for a given photovoltaic technology.

Permanent Link: http://hdl.handle.net/11104/0294161