Mitigating the photodegradation of all-inorganic mixed-halide perovskite nanocrystals by ligand exchange
SCIE
SCOPUS
- Title
- Mitigating the photodegradation of all-inorganic mixed-halide perovskite nanocrystals by ligand exchange
- Authors
- Wahl, Jan; Haizmann, Philipp; Kirsch, Christopher; Frecot, Rene; Mukharamova, Nastasia; Assalauova, Dameli; Kim, Young Yong; Zaluzhnyy, Ivan; Chassé, Thomas; Vartanyants, Ivan A.; Peisert, Heiko; Scheele, Marcus
- Date Issued
- 2022-05
- Publisher
- Royal Society of Chemistry
- Abstract
- We show that the decomposition of caesium lead halide perovskite nanocrystals under continuous X-ray illumination depends on the surface ligand. For oleic acid/oleylamine, we observe a fast decay accompanied by the formation of elemental lead and halogen. Upon surface functionalization with a metal porphyrin derivative, the decay is markedly slower and involves the disproportionation of lead to Pb-0 and Pb3+. In both cases, the decomposition is preceded by a contraction of the atomic lattice, which appears to initiate the decay. We find that the metal porphyrin derivative induces a strong surface dipole on the nanocrystals, which we hold responsible for the altered and slower decomposition pathway. These results are important for application of lead halide perovskite nanocrystals in X-ray scintillators.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/122958
- DOI
- 10.1039/d2cp00546h
- ISSN
- 1463-9076
- Article Type
- Article
- Citation
- Physical Chemistry Chemical Physics, vol. 24, no. 18, page. 10944 - 10951, 2022-05
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- There are no files associated with this item.
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