DOI: https://doi.org/10.29363/nanoge.emlem.2023.007
Publication date: 18th August 2023
Chemically synthesized metal halide perovskite nanocrystals have recently emerged as a new class of efficient light emitting materials which are particularly promising for development of light-emitting diodes (LEDs). Stability of perovskite-based LEDs is still an issue, which can be partially mitigated by proper interface design, such as the use of inter-layer amine terminated carbon dots. As for many other colloidal nanocrystals, proper surface passivation is a key to ensure high colloidal stability and processability of perovskites; this can be achieved by employment of multi-amine chelating ligands. We also show how water-stable perovskite nanocrystals with a mixed fluoropolymer shell can be applied for optical temperature sensing. The use of the lead-based metal halide perovskites is also considered as an issue because of the toxicity concerns related to the lead component. To avoid using lead in light-emitting perovskites, co-doping of cerium and bismuth, as well as tellurium and bismuth into lead-free double perovskite nanocrystals is a useful strategy resulting in their improved photoluminescence efficiency.
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