Effect of Different Bromine Sources on the Dual Cation Mixed Halide Perovskite Solar Cells - Publication - Bridge of Knowledge

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Effect of Different Bromine Sources on the Dual Cation Mixed Halide Perovskite Solar Cells

Abstract

Recent research has shown that perovskite solar cells with a mixed dual A-cation have much better structural stability without loss of efficiency than single cation devices. Mixed cation perovskites create a lot of questions about the salts being used for the formation of the best-quality layer. Here, we have investigated three sources of bromide in the perovskite absorption layer, using lead bromide (PbBr2), formamidinium bromide (FABr), and cesium bromide (CsBr). The experimental results have shown better performance for FABr and CsBr sources of bromide in comparison to the regularly used PbBr2. This effect has been explained with the complex species present in the not-annealed perovskite films which changes the defect states during the crystallization of the absorber layer. It has been found with numerical simulations that the observed phenomenon directly impacts the rates of the trap-assisted recombination. The results of this study are one more step forward in understanding the physics behind the crystallization process which is crucial in further improvement of the perovskite solar cells.

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
ACS Applied Energy Materials no. 3, pages 8285 - 8294,
ISSN: 2574-0962
Language:
English
Publication year:
2020
Bibliographic description:
Głowienka D., Giacomo Di F., Najafi M., Dogan I., Mameli A., Colberts F., Szmytkowski J., Galagan Y.: Effect of Different Bromine Sources on the Dual Cation Mixed Halide Perovskite Solar Cells// ACS Applied Energy Materials -Vol. 3,iss. 9 (2020), s.8285-8294
DOI:
Digital Object Identifier (open in new tab) 10.1021/acsaem.0c00767
Verified by:
Gdańsk University of Technology

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