A two-step sequential deposition method has been applied to prepare the solar cells with two types of perovskites Cs0.15FA0.85Pb(I0.95Cl0.05)3 and Cs0.15FA0.85Pb(I0.95Br0.05)3. In order to obtain the perovskite layers, the different sources of bromine and chlorine atoms were used for synthesis. The performance and time stability of chloride-based photocells are worse in comparison to the bromide-based devices. It can be explained by the effect of an accumulation of Cl atoms at the interfaces between the chloride-based perovskites and the layer of PCBM. Such a process causes an increasing of interface recombination. Also, the bulk density of states and, consequently, the bulk recombination of charge carriers seem to be higher for the perovskite layers obtained with chlorine atoms. The two-step technique applied to create the bromide perovskites less influences the photocells performance as in the case of one-step deposition. We can explain this observation by an existence of nucleation sites in the inorganic layer which improve the growth of a perovskite material.
Authors
- dr hab. inż. Jędrzej Szmytkowski link open in new tab ,
- dr inż. Damian Głowienka link open in new tab ,
- Manon Verger,
- Dr. Harrie Gorter,
- Ilker Dogan,
- Wiljan Verhees,
- dr Mehrdad Najafi,
- Dr Sjoerd Veenstra,
- dr Yulia Galagan
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1016/j.jpowsour.2021.230528
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2021
