Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO23)
DOI: https://doi.org/10.29363/nanoge.nipho.2023.019
Publication date: 3rd April 2023
Metal halide perovskites are promising candidates for next-generation photovoltaics due to their excellent optoelectronic properties, ease of fabrication, and low-cost processing. Wide bandgap perovskite materials, such as methylammonium lead tribromide (MAPbBr3), have been shown to exhibit higher stability against air and moisture which makes them a promising alternative to the more widely studied iodide-based compositions. However, these materials suffer from non-radiative losses and limited lifetime under operating conditions. Ion migration, an inherent characteristic of halide perovskites, is one of the factors that contribute to this limited lifetime. One approach to control ion migration is the host-guest (HG) complexation strategy, which employs various macrocyclic host molecules that selectively bind and deliver geometrically compatible guest molecules through noncovalent interactions. We investigated the use of DB21C7 (dibenzo-21-crown-[7]) in wide-bandgap MAPbBr3 hybrid perovskite solar cells. The employment of DB21C7 as an interfacial modifier boosted open-circuit voltage to 1.5 V, accompanied by improved operational stability and comparable solar cell performance. This approach offers a viable route to regulate the behavior of hybrid perovskite photovoltaics.
(This abstract is part of a Manuscript in preparation "Ferdowsi, P. et al. Host-guest complexation in wide bandgap perovskite solar cells.")
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